1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 2 "http://www.w3.org/TR/html4/loose.dtd"> 3 <html> 4 <head> 5 <title>The XML C parser and toolkit of Gnome</title> 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> 7 </head> 8 <body bgcolor="#ffffff"> 9 <h1 align="center">The XML C parser and toolkit of Gnome</h1> 10 11 <h1>Note: this is the flat content of the <a href="index.html">web 12 site</a></h1> 13 14 <h1 style="text-align: center">libxml, a.k.a. gnome-xml</h1> 15 16 <p></p> 17 18 <p 19 style="text-align: right; font-style: italic; font-size: 10pt">"Programming 20 with libxml2 is like the thrilling embrace of an exotic stranger." <a 21 href="http://diveintomark.org/archives/2004/02/18/libxml2">Mark 22 Pilgrim</a></p> 23 24 <p>Libxml2 is the XML C parser and toolkit developed for the Gnome project 25 (but usable outside of the Gnome platform), it is free software available 26 under the <a href="http://www.opensource.org/licenses/mit-license.html">MIT 27 License</a>. XML itself is a metalanguage to design markup languages, i.e. 28 text language where semantic and structure are added to the content using 29 extra "markup" information enclosed between angle brackets. HTML is the most 30 well-known markup language. Though the library is written in C <a 31 href="python.html">a variety of language bindings</a> make it available in 32 other environments.</p> 33 34 <p>Libxml2 is known to be very portable, the library should build and work 35 without serious troubles on a variety of systems (Linux, Unix, Windows, 36 CygWin, MacOS, MacOS X, RISC Os, OS/2, VMS, QNX, MVS, VxWorks, ...)</p> 37 38 <p>Libxml2 implements a number of existing standards related to markup 39 languages:</p> 40 <ul> 41 <li>the XML standard: <a 42 href="http://www.w3.org/TR/REC-xml">http://www.w3.org/TR/REC-xml</a></li> 43 <li>Namespaces in XML: <a 44 href="http://www.w3.org/TR/REC-xml-names/">http://www.w3.org/TR/REC-xml-names/</a></li> 45 <li>XML Base: <a 46 href="http://www.w3.org/TR/xmlbase/">http://www.w3.org/TR/xmlbase/</a></li> 47 <li><a href="http://www.cis.ohio-state.edu/rfc/rfc2396.txt">RFC 2396</a> : 48 Uniform Resource Identifiers <a 49 href="http://www.ietf.org/rfc/rfc2396.txt">http://www.ietf.org/rfc/rfc2396.txt</a></li> 50 <li>XML Path Language (XPath) 1.0: <a 51 href="http://www.w3.org/TR/xpath">http://www.w3.org/TR/xpath</a></li> 52 <li>HTML4 parser: <a 53 href="http://www.w3.org/TR/html401/">http://www.w3.org/TR/html401/</a></li> 54 <li>XML Pointer Language (XPointer) Version 1.0: <a 55 href="http://www.w3.org/TR/xptr">http://www.w3.org/TR/xptr</a></li> 56 <li>XML Inclusions (XInclude) Version 1.0: <a 57 href="http://www.w3.org/TR/xinclude/">http://www.w3.org/TR/xinclude/</a></li> 58 <li>ISO-8859-x encodings, as well as <a 59 href="http://www.cis.ohio-state.edu/rfc/rfc2044.txt">rfc2044</a> [UTF-8] 60 and <a href="http://www.cis.ohio-state.edu/rfc/rfc2781.txt">rfc2781</a> 61 [UTF-16] Unicode encodings, and more if using iconv support</li> 62 <li>part of SGML Open Technical Resolution TR9401:1997</li> 63 <li>XML Catalogs Working Draft 06 August 2001: <a 64 href="http://www.oasis-open.org/committees/entity/spec-2001-08-06.html">http://www.oasis-open.org/committees/entity/spec-2001-08-06.html</a></li> 65 <li>Canonical XML Version 1.0: <a 66 href="http://www.w3.org/TR/xml-c14n">http://www.w3.org/TR/xml-c14n</a> 67 and the Exclusive XML Canonicalization CR draft <a 68 href="http://www.w3.org/TR/xml-exc-c14n">http://www.w3.org/TR/xml-exc-c14n</a></li> 69 <li>Relax NG, ISO/IEC 19757-2:2003, <a 70 href="http://www.oasis-open.org/committees/relax-ng/spec-20011203.html">http://www.oasis-open.org/committees/relax-ng/spec-20011203.html</a></li> 71 <li>W3C XML Schemas Part 2: Datatypes <a 72 href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/">REC 02 May 73 2001</a></li> 74 <li>W3C <a href="http://www.w3.org/TR/xml-id/">xml:id</a> Working Draft 7 75 April 2004</li> 76 </ul> 77 78 <p>In most cases libxml2 tries to implement the specifications in a 79 relatively strictly compliant way. As of release 2.4.16, libxml2 passed all 80 1800+ tests from the <a 81 href="http://www.oasis-open.org/committees/xml-conformance/">OASIS XML Tests 82 Suite</a>.</p> 83 84 <p>To some extent libxml2 provides support for the following additional 85 specifications but doesn't claim to implement them completely:</p> 86 <ul> 87 <li>Document Object Model (DOM) <a 88 href="http://www.w3.org/TR/DOM-Level-2-Core/">http://www.w3.org/TR/DOM-Level-2-Core/</a> 89 the document model, but it doesn't implement the API itself, gdome2 does 90 this on top of libxml2</li> 91 <li><a href="http://www.cis.ohio-state.edu/rfc/rfc959.txt">RFC 959</a> : 92 libxml2 implements a basic FTP client code</li> 93 <li><a href="http://www.cis.ohio-state.edu/rfc/rfc1945.txt">RFC 1945</a> : 94 HTTP/1.0, again a basic HTTP client code</li> 95 <li>SAX: a SAX2 like interface and a minimal SAX1 implementation compatible 96 with early expat versions</li> 97 </ul> 98 99 <p>A partial implementation of <a 100 href="http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/">XML Schemas Part 101 1: Structure</a> is being worked on but it would be far too early to make any 102 conformance statement about it at the moment.</p> 103 104 <p>Separate documents:</p> 105 <ul> 106 <li><a href="http://xmlsoft.org/XSLT/">the libxslt page</a> providing an 107 implementation of XSLT 1.0 and common extensions like EXSLT for 108 libxml2</li> 109 <li><a href="http://gdome2.cs.unibo.it/">the gdome2 page</a> 110 : a standard DOM2 implementation for libxml2</li> 111 <li><a href="http://www.aleksey.com/xmlsec/">the XMLSec page</a>: an 112 implementation of <a href="http://www.w3.org/TR/xmldsig-core/">W3C XML 113 Digital Signature</a> for libxml2</li> 114 <li>also check the related links section for more related and active 115 projects.</li> 116 </ul> 117 <p> Hosting sponsored by <a href="http://www.aoemedia.de/opensource-cms.html" 118 >Open Source CMS services</a> from AOE media.</p> 119 120 <p>Logo designed by <a href="mailto:liyanage (a] access.ch">Marc Liyanage</a>.</p> 121 122 <h2><a name="Introducti">Introduction</a></h2> 123 124 <p>This document describes libxml, the <a 125 href="http://www.w3.org/XML/">XML</a> C parser and toolkit developed for the 126 <a href="http://www.gnome.org/">Gnome</a> project. <a 127 href="http://www.w3.org/XML/">XML is a standard</a> for building tag-based 128 structured documents/data.</p> 129 130 <p>Here are some key points about libxml:</p> 131 <ul> 132 <li>Libxml2 exports Push (progressive) and Pull (blocking) type parser 133 interfaces for both XML and HTML.</li> 134 <li>Libxml2 can do DTD validation at parse time, using a parsed document 135 instance, or with an arbitrary DTD.</li> 136 <li>Libxml2 includes complete <a 137 href="http://www.w3.org/TR/xpath">XPath</a>, <a 138 href="http://www.w3.org/TR/xptr">XPointer</a> and <a 139 href="http://www.w3.org/TR/xinclude">XInclude</a> implementations.</li> 140 <li>It is written in plain C, making as few assumptions as possible, and 141 sticking closely to ANSI C/POSIX for easy embedding. Works on 142 Linux/Unix/Windows, ported to a number of other platforms.</li> 143 <li>Basic support for HTTP and FTP client allowing applications to fetch 144 remote resources.</li> 145 <li>The design is modular, most of the extensions can be compiled out.</li> 146 <li>The internal document representation is as close as possible to the <a 147 href="http://www.w3.org/DOM/">DOM</a> interfaces.</li> 148 <li>Libxml2 also has a <a 149 href="http://www.megginson.com/SAX/index.html">SAX like interface</a>; 150 the interface is designed to be compatible with <a 151 href="http://www.jclark.com/xml/expat.html">Expat</a>.</li> 152 <li>This library is released under the <a 153 href="http://www.opensource.org/licenses/mit-license.html">MIT 154 License</a>. See the Copyright file in the distribution for the precise 155 wording.</li> 156 </ul> 157 158 <p>Warning: unless you are forced to because your application links with a 159 Gnome-1.X library requiring it, <strong><span 160 style="background-color: #FF0000">Do Not Use libxml1</span></strong>, use 161 libxml2</p> 162 163 <h2><a name="FAQ">FAQ</a></h2> 164 165 <p>Table of Contents:</p> 166 <ul> 167 <li><a href="FAQ.html#License">License(s)</a></li> 168 <li><a href="FAQ.html#Installati">Installation</a></li> 169 <li><a href="FAQ.html#Compilatio">Compilation</a></li> 170 <li><a href="FAQ.html#Developer">Developer corner</a></li> 171 </ul> 172 173 <h3><a name="License">License</a>(s)</h3> 174 <ol> 175 <li><em>Licensing Terms for libxml</em> 176 <p>libxml2 is released under the <a 177 href="http://www.opensource.org/licenses/mit-license.html">MIT 178 License</a>; see the file Copyright in the distribution for the precise 179 wording</p> 180 </li> 181 <li><em>Can I embed libxml2 in a proprietary application ?</em> 182 <p>Yes. The MIT License allows you to keep proprietary the changes you 183 made to libxml, but it would be graceful to send-back bug fixes and 184 improvements as patches for possible incorporation in the main 185 development tree.</p> 186 </li> 187 </ol> 188 189 <h3><a name="Installati">Installation</a></h3> 190 <ol> 191 <li><strong><span style="background-color: #FF0000">Do Not Use 192 libxml1</span></strong>, use libxml2</li> 193 <p></p> 194 <li><em>Where can I get libxml</em> ? 195 <p>The original distribution comes from <a 196 href="ftp://xmlsoft.org/libxml2/">xmlsoft.org</a> or <a 197 href="ftp://ftp.gnome.org/pub/GNOME/sources/libxml2/2.6/">gnome.org</a></p> 198 <p>Most Linux and BSD distributions include libxml, this is probably the 199 safer way for end-users to use libxml.</p> 200 <p>David Doolin provides precompiled Windows versions at <a 201 href="http://www.ce.berkeley.edu/~doolin/code/libxmlwin32/ ">http://www.ce.berkeley.edu/~doolin/code/libxmlwin32/</a></p> 202 </li> 203 <p></p> 204 <li><em>I see libxml and libxml2 releases, which one should I install ?</em> 205 <ul> 206 <li>If you are not constrained by backward compatibility issues with 207 existing applications, install libxml2 only</li> 208 <li>If you are not doing development, you can safely install both. 209 Usually the packages <a 210 href="http://rpmfind.net/linux/RPM/libxml.html">libxml</a> and <a 211 href="http://rpmfind.net/linux/RPM/libxml2.html">libxml2</a> are 212 compatible (this is not the case for development packages).</li> 213 <li>If you are a developer and your system provides separate packaging 214 for shared libraries and the development components, it is possible 215 to install libxml and libxml2, and also <a 216 href="http://rpmfind.net/linux/RPM/libxml-devel.html">libxml-devel</a> 217 and <a 218 href="http://rpmfind.net/linux/RPM/libxml2-devel.html">libxml2-devel</a> 219 too for libxml2 >= 2.3.0</li> 220 <li>If you are developing a new application, please develop against 221 libxml2(-devel)</li> 222 </ul> 223 </li> 224 <li><em>I can't install the libxml package, it conflicts with libxml0</em> 225 <p>You probably have an old libxml0 package used to provide the shared 226 library for libxml.so.0, you can probably safely remove it. The libxml 227 packages provided on <a 228 href="ftp://xmlsoft.org/libxml2/">xmlsoft.org</a> provide 229 libxml.so.0</p> 230 </li> 231 <li><em>I can't install the libxml(2) RPM package due to failed 232 dependencies</em> 233 <p>The most generic solution is to re-fetch the latest src.rpm , and 234 rebuild it locally with</p> 235 <p><code>rpm --rebuild libxml(2)-xxx.src.rpm</code>.</p> 236 <p>If everything goes well it will generate two binary rpm packages (one 237 providing the shared libs and xmllint, and the other one, the -devel 238 package, providing includes, static libraries and scripts needed to build 239 applications with libxml(2)) that you can install locally.</p> 240 </li> 241 </ol> 242 243 <h3><a name="Compilatio">Compilation</a></h3> 244 <ol> 245 <li><em>What is the process to compile libxml2 ?</em> 246 <p>As most UNIX libraries libxml2 follows the "standard":</p> 247 <p><code>gunzip -c xxx.tar.gz | tar xvf -</code></p> 248 <p><code>cd libxml-xxxx</code></p> 249 <p><code>./configure --help</code></p> 250 <p>to see the options, then the compilation/installation proper</p> 251 <p><code>./configure [possible options]</code></p> 252 <p><code>make</code></p> 253 <p><code>make install</code></p> 254 <p>At that point you may have to rerun ldconfig or a similar utility to 255 update your list of installed shared libs.</p> 256 </li> 257 <li><em>What other libraries are needed to compile/install libxml2 ?</em> 258 <p>Libxml2 does not require any other library, the normal C ANSI API 259 should be sufficient (please report any violation to this rule you may 260 find).</p> 261 <p>However if found at configuration time libxml2 will detect and use the 262 following libs:</p> 263 <ul> 264 <li><a href="http://www.info-zip.org/pub/infozip/zlib/">libz</a> : a 265 highly portable and available widely compression library.</li> 266 <li>iconv: a powerful character encoding conversion library. It is 267 included by default in recent glibc libraries, so it doesn't need to 268 be installed specifically on Linux. It now seems a <a 269 href="http://www.opennc.org/onlinepubs/7908799/xsh/iconv.html">part 270 of the official UNIX</a> specification. Here is one <a 271 href="http://www.gnu.org/software/libiconv/">implementation of the 272 library</a> which source can be found <a 273 href="ftp://ftp.ilog.fr/pub/Users/haible/gnu/">here</a>.</li> 274 </ul> 275 </li> 276 <p></p> 277 <li><em>Make check fails on some platforms</em> 278 <p>Sometimes the regression tests' results don't completely match the 279 value produced by the parser, and the makefile uses diff to print the 280 delta. On some platforms the diff return breaks the compilation process; 281 if the diff is small this is probably not a serious problem.</p> 282 <p>Sometimes (especially on Solaris) make checks fail due to limitations 283 in make. Try using GNU-make instead.</p> 284 </li> 285 <li><em>I use the SVN version and there is no configure script</em> 286 <p>The configure script (and other Makefiles) are generated. Use the 287 autogen.sh script to regenerate the configure script and Makefiles, 288 like:</p> 289 <p><code>./autogen.sh --prefix=/usr --disable-shared</code></p> 290 </li> 291 <li><em>I have troubles when running make tests with gcc-3.0</em> 292 <p>It seems the initial release of gcc-3.0 has a problem with the 293 optimizer which miscompiles the URI module. Please use another 294 compiler.</p> 295 </li> 296 </ol> 297 298 <h3><a name="Developer">Developer</a> corner</h3> 299 <ol> 300 <li><em>Troubles compiling or linking programs using libxml2</em> 301 <p>Usually the problem comes from the fact that the compiler doesn't get 302 the right compilation or linking flags. There is a small shell script 303 <code>xml2-config</code> which is installed as part of libxml2 usual 304 install process which provides those flags. Use</p> 305 <p><code>xml2-config --cflags</code></p> 306 <p>to get the compilation flags and</p> 307 <p><code>xml2-config --libs</code></p> 308 <p>to get the linker flags. Usually this is done directly from the 309 Makefile as:</p> 310 <p><code>CFLAGS=`xml2-config --cflags`</code></p> 311 <p><code>LIBS=`xml2-config --libs`</code></p> 312 </li> 313 <li><em>I want to install my own copy of libxml2 in my home directory and 314 link my programs against it, but it doesn't work</em> 315 <p>There are many different ways to accomplish this. Here is one way to 316 do this under Linux. Suppose your home directory is <code>/home/user. 317 </code>Then:</p> 318 <ul> 319 <li>Create a subdirectory, let's call it <code>myxml</code></li> 320 <li>unpack the libxml2 distribution into that subdirectory</li> 321 <li>chdir into the unpacked distribution 322 (<code>/home/user/myxml/libxml2 </code>)</li> 323 <li>configure the library using the "<code>--prefix</code>" switch, 324 specifying an installation subdirectory in 325 <code>/home/user/myxml</code>, e.g. 326 <p><code>./configure --prefix /home/user/myxml/xmlinst</code> {other 327 configuration options}</p> 328 </li> 329 <li>now run <code>make</code> followed by <code>make install</code></li> 330 <li>At this point, the installation subdirectory contains the complete 331 "private" include files, library files and binary program files (e.g. 332 xmllint), located in 333 <p><code>/home/user/myxml/xmlinst/lib, 334 /home/user/myxml/xmlinst/include </code> and <code> 335 /home/user/myxml/xmlinst/bin</code></p> 336 respectively.</li> 337 <li>In order to use this "private" library, you should first add it to 338 the beginning of your default PATH (so that your own private program 339 files such as xmllint will be used instead of the normal system 340 ones). To do this, the Bash command would be 341 <p><code>export PATH=/home/user/myxml/xmlinst/bin:$PATH</code></p> 342 </li> 343 <li>Now suppose you have a program <code>test1.c</code> that you would 344 like to compile with your "private" library. Simply compile it using 345 the command 346 <p><code>gcc `xml2-config --cflags --libs` -o test test.c</code></p> 347 Note that, because your PATH has been set with <code> 348 /home/user/myxml/xmlinst/bin</code> at the beginning, the xml2-config 349 program which you just installed will be used instead of the system 350 default one, and this will <em>automatically</em> get the correct 351 libraries linked with your program.</li> 352 </ul> 353 </li> 354 355 <p></p> 356 <li><em>xmlDocDump() generates output on one line.</em> 357 <p>Libxml2 will not <strong>invent</strong> spaces in the content of a 358 document since <strong>all spaces in the content of a document are 359 significant</strong>. If you build a tree from the API and want 360 indentation:</p> 361 <ol> 362 <li>the correct way is to generate those yourself too.</li> 363 <li>the dangerous way is to ask libxml2 to add those blanks to your 364 content <strong>modifying the content of your document in the 365 process</strong>. The result may not be what you expect. There is 366 <strong>NO</strong> way to guarantee that such a modification won't 367 affect other parts of the content of your document. See <a 368 href="http://xmlsoft.org/html/libxml-parser.html#xmlKeepBlanksDefault">xmlKeepBlanksDefault 369 ()</a> and <a 370 href="http://xmlsoft.org/html/libxml-tree.html#xmlSaveFormatFile">xmlSaveFormatFile 371 ()</a></li> 372 </ol> 373 </li> 374 <p></p> 375 <li><em>Extra nodes in the document:</em> 376 <p><em>For an XML file as below:</em></p> 377 <pre><?xml version="1.0"?> 378 <PLAN xmlns="http://www.argus.ca/autotest/1.0/"> 379 <NODE CommFlag="0"/> 380 <NODE CommFlag="1"/> 381 </PLAN></pre> 382 <p><em>after parsing it with the function 383 pxmlDoc=xmlParseFile(...);</em></p> 384 <p><em>I want to the get the content of the first node (node with the 385 CommFlag="0")</em></p> 386 <p><em>so I did it as following;</em></p> 387 <pre>xmlNodePtr pnode; 388 pnode=pxmlDoc->children->children;</pre> 389 <p><em>but it does not work. If I change it to</em></p> 390 <pre>pnode=pxmlDoc->children->children->next;</pre> 391 <p><em>then it works. Can someone explain it to me.</em></p> 392 <p></p> 393 <p>In XML all characters in the content of the document are significant 394 <strong>including blanks and formatting line breaks</strong>.</p> 395 <p>The extra nodes you are wondering about are just that, text nodes with 396 the formatting spaces which are part of the document but that people tend 397 to forget. There is a function <a 398 href="http://xmlsoft.org/html/libxml-parser.html">xmlKeepBlanksDefault 399 ()</a> to remove those at parse time, but that's an heuristic, and its 400 use should be limited to cases where you are certain there is no 401 mixed-content in the document.</p> 402 </li> 403 <li><em>I get compilation errors of existing code like when accessing 404 <strong>root</strong> or <strong>child fields</strong> of nodes.</em> 405 <p>You are compiling code developed for libxml version 1 and using a 406 libxml2 development environment. Either switch back to libxml v1 devel or 407 even better fix the code to compile with libxml2 (or both) by <a 408 href="upgrade.html">following the instructions</a>.</p> 409 </li> 410 <li><em>I get compilation errors about non existing 411 <strong>xmlRootNode</strong> or <strong>xmlChildrenNode</strong> 412 fields.</em> 413 <p>The source code you are using has been <a 414 href="upgrade.html">upgraded</a> to be able to compile with both libxml 415 and libxml2, but you need to install a more recent version: 416 libxml(-devel) >= 1.8.8 or libxml2(-devel) >= 2.1.0</p> 417 </li> 418 <li><em>Random crashes in threaded applications</em> 419 <p>Read and follow all advices on the <a href="threads.html">thread 420 safety</a> page, and make 100% sure you never call xmlCleanupParser() 421 while the library or an XML document might still be in use by another 422 thread.</p> 423 </li> 424 <li><em>The example provided in the web page does not compile.</em> 425 <p>It's hard to maintain the documentation in sync with the code 426 <grin/> ...</p> 427 <p>Check the previous points 1/ and 2/ raised before, and please send 428 patches.</p> 429 </li> 430 <li><em>Where can I get more examples and information than provided on the 431 web page?</em> 432 <p>Ideally a libxml2 book would be nice. I have no such plan ... But you 433 can:</p> 434 <ul> 435 <li>check more deeply the <a href="html/libxml-lib.html">existing 436 generated doc</a></li> 437 <li>have a look at <a href="examples/index.html">the set of 438 examples</a>.</li> 439 <li>look for examples of use for libxml2 function using the Gnome code 440 or by asking on Google.</li> 441 <li><a 442 href="http://svn.gnome.org/viewvc/libxml2/trunk/">Browse 443 the libxml2 source</a> , I try to write code as clean and documented 444 as possible, so looking at it may be helpful. In particular the code 445 of <a href="http://svn.gnome.org/viewvc/libxml2/trunk/xmllint.c?view=markup">xmllint.c</a> and of the various testXXX.c test programs should 446 provide good examples of how to do things with the library.</li> 447 </ul> 448 </li> 449 <p></p> 450 <li><em>What about C++ ?</em> 451 <p>libxml2 is written in pure C in order to allow easy reuse on a number 452 of platforms, including embedded systems. I don't intend to convert to 453 C++.</p> 454 <p>There is however a C++ wrapper which may fulfill your needs:</p> 455 <ul> 456 <li>by Ari Johnson <ari (a] btigate.com>: 457 <p>Website: <a 458 href="http://libxmlplusplus.sourceforge.net/">http://libxmlplusplus.sourceforge.net/</a></p> 459 <p>Download: <a 460 href="http://sourceforge.net/project/showfiles.php?group_id=12999">http://sourceforge.net/project/showfiles.php?group_id=12999</a></p> 461 </li> 462 </ul> 463 </li> 464 <li><em>How to validate a document a posteriori ?</em> 465 <p>It is possible to validate documents which had not been validated at 466 initial parsing time or documents which have been built from scratch 467 using the API. Use the <a 468 href="http://xmlsoft.org/html/libxml-valid.html#xmlValidateDtd">xmlValidateDtd()</a> 469 function. It is also possible to simply add a DTD to an existing 470 document:</p> 471 <pre>xmlDocPtr doc; /* your existing document */ 472 xmlDtdPtr dtd = xmlParseDTD(NULL, filename_of_dtd); /* parse the DTD */ 473 474 dtd->name = xmlStrDup((xmlChar*)"root_name"); /* use the given root */ 475 476 doc->intSubset = dtd; 477 if (doc->children == NULL) xmlAddChild((xmlNodePtr)doc, (xmlNodePtr)dtd); 478 else xmlAddPrevSibling(doc->children, (xmlNodePtr)dtd); 479 </pre> 480 </li> 481 <li><em>So what is this funky "xmlChar" used all the time?</em> 482 <p>It is a null terminated sequence of utf-8 characters. And only utf-8! 483 You need to convert strings encoded in different ways to utf-8 before 484 passing them to the API. This can be accomplished with the iconv library 485 for instance.</p> 486 </li> 487 <li>etc ...</li> 488 </ol> 489 490 <p></p> 491 492 <h2><a name="Documentat">Developer Menu</a></h2> 493 494 <p>There are several on-line resources related to using libxml:</p> 495 <ol> 496 <li>Use the <a href="search.php">search engine</a> to look up 497 information.</li> 498 <li>Check the <a href="FAQ.html">FAQ.</a></li> 499 <li>Check the <a href="http://xmlsoft.org/html/libxml-lib.html">extensive 500 documentation</a> automatically extracted from code comments.</li> 501 <li>Look at the documentation about <a href="encoding.html">libxml 502 internationalization support</a>.</li> 503 <li>This page provides a global overview and <a href="example.html">some 504 examples</a> on how to use libxml.</li> 505 <li><a href="examples/index.html">Code examples</a></li> 506 <li>John Fleck's libxml2 tutorial: <a href="tutorial/index.html">html</a> 507 or <a href="tutorial/xmltutorial.pdf">pdf</a>.</li> 508 <li>If you need to parse large files, check the <a 509 href="xmlreader.html">xmlReader</a> API tutorial</li> 510 <li><a href="mailto:james (a] daa.com.au">James Henstridge</a> wrote <a 511 href="http://www.jamesh.id.au/articles/libxml-sax/libxml-sax.html">some nice 512 documentation</a> explaining how to use the libxml SAX interface.</li> 513 <li>George Lebl wrote <a 514 href="http://www-106.ibm.com/developerworks/library/l-gnome3/">an article 515 for IBM developerWorks</a> about using libxml.</li> 516 <li>Check <a href="http://svn.gnome.org/viewvc/libxml2/trunk/TODO?view=markup">the TODO 517 file</a>.</li> 518 <li>Read the <a href="upgrade.html">1.x to 2.x upgrade path</a> 519 description. If you are starting a new project using libxml you should 520 really use the 2.x version.</li> 521 <li>And don't forget to look at the <a 522 href="http://mail.gnome.org/archives/xml/">mailing-list archive</a>.</li> 523 </ol> 524 525 <h2><a name="Reporting">Reporting bugs and getting help</a></h2> 526 527 <p>Well, bugs or missing features are always possible, and I will make a 528 point of fixing them in a timely fashion. The best way to report a bug is to 529 use the <a href="http://bugzilla.gnome.org/buglist.cgi?product=libxml2">Gnome 530 bug tracking database</a> (make sure to use the "libxml2" module name). I 531 look at reports there regularly and it's good to have a reminder when a bug 532 is still open. Be sure to specify that the bug is for the package libxml2.</p> 533 534 <p>For small problems you can try to get help on IRC, the #xml channel on 535 irc.gnome.org (port 6667) usually have a few person subscribed which may help 536 (but there is no guarantee and if a real issue is raised it should go on the 537 mailing-list for archival).</p> 538 539 <p>There is also a mailing-list <a 540 href="mailto:xml (a] gnome.org">xml (a] gnome.org</a> for libxml, with an <a 541 href="http://mail.gnome.org/archives/xml/">on-line archive</a> (<a 542 href="http://xmlsoft.org/messages">old</a>). To subscribe to this list, 543 please visit the <a 544 href="http://mail.gnome.org/mailman/listinfo/xml">associated Web</a> page and 545 follow the instructions. <strong>Do not send code, I won't debug it</strong> 546 (but patches are really appreciated!).</p> 547 548 <p>Please note that with the current amount of virus and SPAM, sending mail 549 to the list without being subscribed won't work. There is *far too many 550 bounces* (in the order of a thousand a day !) I cannot approve them manually 551 anymore. If your mail to the list bounced waiting for administrator approval, 552 it is LOST ! Repost it and fix the problem triggering the error. Also please 553 note that <span style="color: #FF0000; background-color: #FFFFFF">emails with 554 a legal warning asking to not copy or redistribute freely the information 555 they contain</span> are <strong>NOT</strong> acceptable for the mailing-list, 556 such mail will as much as possible be discarded automatically, and are less 557 likely to be answered if they made it to the list, <strong>DO NOT</strong> 558 post to the list from an email address where such legal requirements are 559 automatically added, get private paying support if you can't share 560 information.</p> 561 562 <p>Check the following <strong><span style="color: #FF0000">before 563 posting</span></strong>:</p> 564 <ul> 565 <li>Read the <a href="FAQ.html">FAQ</a> and <a href="search.php">use the 566 search engine</a> to get information related to your problem.</li> 567 <li>Make sure you are <a href="ftp://xmlsoft.org/libxml2/">using a recent 568 version</a>, and that the problem still shows up in a recent version.</li> 569 <li>Check the <a href="http://mail.gnome.org/archives/xml/">list 570 archives</a> to see if the problem was reported already. In this case 571 there is probably a fix available, similarly check the <a 572 href="http://bugzilla.gnome.org/buglist.cgi?product=libxml2">registered 573 open bugs</a>.</li> 574 <li>Make sure you can reproduce the bug with xmllint or one of the test 575 programs found in source in the distribution.</li> 576 <li>Please send the command showing the error as well as the input (as an 577 attachment)</li> 578 </ul> 579 580 <p>Then send the bug with associated information to reproduce it to the <a 581 href="mailto:xml (a] gnome.org">xml (a] gnome.org</a> list; if it's really libxml 582 related I will approve it. Please do not send mail to me directly, it makes 583 things really hard to track and in some cases I am not the best person to 584 answer a given question, ask on the list.</p> 585 586 <p>To <span style="color: #E50000">be really clear about support</span>:</p> 587 <ul> 588 <li>Support or help <span style="color: #E50000">requests MUST be sent to 589 the list or on bugzilla</span> in case of problems, so that the Question 590 and Answers can be shared publicly. Failing to do so carries the implicit 591 message "I want free support but I don't want to share the benefits with 592 others" and is not welcome. I will automatically Carbon-Copy the 593 xml (a] gnome.org mailing list for any technical reply made about libxml2 or 594 libxslt.</li> 595 <li>There is <span style="color: #E50000">no guarantee of support</span>. If 596 your question remains unanswered after a week, repost it, making sure you 597 gave all the detail needed and the information requested.</li> 598 <li>Failing to provide information as requested or double checking first 599 for prior feedback also carries the implicit message "the time of the 600 library maintainers is less valuable than my time" and might not be 601 welcome.</li> 602 </ul> 603 604 <p>Of course, bugs reported with a suggested patch for fixing them will 605 probably be processed faster than those without.</p> 606 607 <p>If you're looking for help, a quick look at <a 608 href="http://mail.gnome.org/archives/xml/">the list archive</a> may actually 609 provide the answer. I usually send source samples when answering libxml2 610 usage questions. The <a 611 href="http://xmlsoft.org/html/book1.html">auto-generated documentation</a> is 612 not as polished as I would like (i need to learn more about DocBook), but 613 it's a good starting point.</p> 614 615 <h2><a name="help">How to help</a></h2> 616 617 <p>You can help the project in various ways, the best thing to do first is to 618 subscribe to the mailing-list as explained before, check the <a 619 href="http://mail.gnome.org/archives/xml/">archives </a>and the <a 620 href="http://bugzilla.gnome.org/buglist.cgi?product=libxml2">Gnome bug 621 database</a>:</p> 622 <ol> 623 <li>Provide patches when you find problems.</li> 624 <li>Provide the diffs when you port libxml2 to a new platform. They may not 625 be integrated in all cases but help pinpointing portability problems 626 and</li> 627 <li>Provide documentation fixes (either as patches to the code comments or 628 as HTML diffs).</li> 629 <li>Provide new documentations pieces (translations, examples, etc 630 ...).</li> 631 <li>Check the TODO file and try to close one of the items.</li> 632 <li>Take one of the points raised in the archive or the bug database and 633 provide a fix. <a href="mailto:daniel (a] veillard.com">Get in touch with me 634 </a>before to avoid synchronization problems and check that the suggested 635 fix will fit in nicely :-)</li> 636 </ol> 637 638 <h2><a name="Downloads">Downloads</a></h2> 639 640 <p>The latest versions of libxml2 can be found on the <a 641 href="ftp://xmlsoft.org/libxml2/">xmlsoft.org</a> server ( <a 642 href="ftp://xmlsoft.org/libxml2/">FTP</a> and rsync are available), there are also 643 mirrors (<a href="ftp://fr.rpmfind.net/pub/libxml/">France</a> and 644 Antonin Sprinzl also provide <a href="ftp://gd.tuwien.ac.at/pub/libxml/">a 645 mirror in Austria</a>). (NOTE that you need both the <a 646 href="http://rpmfind.net/linux/RPM/libxml2.html">libxml(2)</a> and <a 647 href="http://rpmfind.net/linux/RPM/libxml2-devel.html">libxml(2)-devel</a> 648 packages installed to compile applications using libxml if using RPMs.)</p> 649 650 <p>You can find all the history of libxml(2) and libxslt releases in the <a 651 href="http://xmlsoft.org/sources/old/">old</a> directory. The precompiled 652 Windows binaries made by Igor Zlatovic are available in the <a 653 href="http://xmlsoft.org/sources/win32/">win32</a> directory.</p> 654 655 <p>Binary ports:</p> 656 <ul> 657 <li>RPMs for x86_64 are available directly on <a 658 href="ftp://xmlsoft.org/libxml2/">xmlsoft.org</a>, the source RPM will compile on 659 any architecture supported.</li> 660 <li><a href="mailto:igor (a] zlatkovic.com">Igor Zlatkovic</a> is now the 661 maintainer of the Windows port, <a 662 href="http://www.zlatkovic.com/projects/libxml/index.html">he provides 663 binaries</a>.</li> 664 <li>OpenCSW provides <a 665 href="http://opencsw.org/packages/libxml2">Solaris 666 binaries</a>.</li> 667 <li><a href="mailto:Steve.Ball (a] explain.com.au">Steve Ball</a> provides <a 668 href="http://www.explain.com.au/oss/libxml2xslt.html">Mac Os X 669 binaries</a>.</li> 670 <li>The HP-UX porting center provides <a 671 href="http://hpux.connect.org.uk/hppd/hpux/Gnome/">HP-UX binaries</a></li> 672 <li>Bull provides precompiled <a 673 href="http://gnome.bullfreeware.com/new_index.html">RPMs for AIX</a> as 674 patr of their GNOME packages</li> 675 </ul> 676 677 <p>If you know other supported binary ports, please <a 678 href="http://veillard.com/">contact me</a>.</p> 679 680 <p><a name="Snapshot">Snapshot:</a></p> 681 <ul> 682 <li>Code from the GNOME GIT base libxml2 module, updated hourly <a 683 href="ftp://xmlsoft.org/libxml2/libxml2-git-snapshot.tar.gz">libxml2-git-snapshot.tar.gz</a>.</li> 684 <li>Docs, content of the web site, the list archive included <a 685 href="ftp://xmlsoft.org/libxml2/libxml-docs.tar.gz">libxml-docs.tar.gz</a>.</li> 686 </ul> 687 688 <p><a name="Contribs">Contributions:</a></p> 689 690 <p>I do accept external contributions, especially if compiling on another 691 platform, get in touch with the list to upload the package, wrappers for 692 various languages have been provided, and can be found in the <a 693 href="python.html">bindings section</a></p> 694 695 <p>Libxml2 is also available from GIT:</p> 696 <ul> 697 <li><p>See <a href="http://git.gnome.org/browse/libxml2/">libxml2 Git web</a>. 698 To checkout a local tree use:</p> 699 <pre>git clone git://git.gnome.org/libxml2</pre> 700 </li> 701 <li>The <strong>libxslt</strong> module is also present 702 <a href="http://git.gnome.org/browse/libxslt/">there</a>.</li> 703 </ul> 704 705 <h2><a name="News">Releases</a></h2> 706 707 <p>The <a href="ChangeLog.html">change log</a> describes the recents commits 708 to the <a href="http://git.gnome.org/browse/libxml2/">GIT</a> code base.</p> 709 710 <p>Here is the list of public releases:</p> 711 712 <h3>v2.9.3: Nov 20 2015</h3> 713 <ul> 714 <li>Security:<br/> 715 CVE-2015-8242 Buffer overead with HTML parser in push mode (Hugh Davenport),<br/> 716 CVE-2015-7500 Fix memory access error due to incorrect entities boundaries (Daniel Veillard),<br/> 717 CVE-2015-7499-2 Detect incoherency on GROW (Daniel Veillard),<br/> 718 CVE-2015-7499-1 Add xmlHaltParser() to stop the parser (Daniel Veillard),<br/> 719 CVE-2015-5312 Another entity expansion issue (David Drysdale),<br/> 720 CVE-2015-7497 Avoid an heap buffer overflow in xmlDictComputeFastQKey (David Drysdale),<br/> 721 CVE-2015-7498 Avoid processing entities after encoding conversion failures (Daniel Veillard),<br/> 722 CVE-2015-8035 Fix XZ compression support loop (Daniel Veillard),<br/> 723 CVE-2015-7942-2 Fix an error in previous Conditional section patch (Daniel Veillard),<br/> 724 CVE-2015-7942 Another variation of overflow in Conditional sections (Daniel Veillard),<br/> 725 CVE-2015-1819 Enforce the reader to run in constant memory (Daniel Veillard)<br/> 726 CVE-2015-7941_2 Cleanup conditional section error handling (Daniel Veillard),<br/> 727 CVE-2015-7941_1 Stop parsing on entities boundaries errors (Daniel Veillard),<br/> 728 </li> 729 730 <li>Documentation:<br/> 731 Correct spelling of "calling" (Alex Henrie),<br/> 732 Fix a small error in xmllint --format description (Fabien Degomme),<br/> 733 Avoid XSS on the search of xmlsoft.org (Daniel Veillard)<br/> 734 </li> 735 736 <li>Portability:<br/> 737 threads: use forward declarations only for glibc (Michael Heimpold),<br/> 738 Update Win32 configure.js to search for configure.ac (Daniel Veillard)<br/> 739 </li> 740 741 <li>Bug Fixes:<br/> 742 Bug on creating new stream from entity (Daniel Veillard),<br/> 743 Fix some loop issues embedding NEXT (Daniel Veillard),<br/> 744 Do not print error context when there is none (Daniel Veillard),<br/> 745 Avoid extra processing of MarkupDecl when EOF (Hugh Davenport),<br/> 746 Fix parsing short unclosed comment uninitialized access (Daniel Veillard),<br/> 747 Add missing Null check in xmlParseExternalEntityPrivate (Gaurav Gupta),<br/> 748 Fix a bug in CData error handling in the push parser (Daniel Veillard),<br/> 749 Fix a bug on name parsing at the end of current input buffer (Daniel Veillard),<br/> 750 Fix the spurious ID already defined error (Daniel Veillard),<br/> 751 Fix previous change to node sort order (Nick Wellnhofer),<br/> 752 Fix a self assignment issue raised by clang (Scott Graham),<br/> 753 Fail parsing early on if encoding conversion failed (Daniel Veillard),<br/> 754 Do not process encoding values if the declaration if broken (Daniel Veillard),<br/> 755 Silence clang's -Wunknown-attribute (Michael Catanzaro),<br/> 756 xmlMemUsed is not thread-safe (Martin von Gagern),<br/> 757 Fix support for except in nameclasses (Daniel Veillard),<br/> 758 Fix order of root nodes (Nick Wellnhofer),<br/> 759 Allow attributes on descendant-or-self axis (Nick Wellnhofer),<br/> 760 Fix the fix to Windows locking (Steve Nairn),<br/> 761 Fix timsort invariant loop re: Envisage article (Christopher Swenson),<br/> 762 Don't add IDs in xmlSetTreeDoc (Nick Wellnhofer),<br/> 763 Account for ID attributes in xmlSetTreeDoc (Nick Wellnhofer),<br/> 764 Remove various unused value assignments (Philip Withnall),<br/> 765 Fix missing entities after CVE-2014-3660 fix (Daniel Veillard),<br/> 766 Revert "Missing initialization for the catalog module" (Daniel Veillard)<br/> 767 </li> 768 769 <li>Improvements:<br/> 770 Reuse xmlHaltParser() where it makes sense (Daniel Veillard),<br/> 771 xmlStopParser reset errNo (Daniel Veillard),<br/> 772 Reenable xz support by default (Daniel Veillard),<br/> 773 Recover unescaped less-than character in HTML recovery parsing (Daniel Veillard),<br/> 774 Allow HTML serializer to output HTML5 DOCTYPE (Shaun McCance),<br/> 775 Regression test for bug #695699 (Nick Wellnhofer),<br/> 776 Add a couple of XPath tests (Nick Wellnhofer),<br/> 777 Add Python 3 rpm subpackage (Tomas Radej),<br/> 778 libxml2-config.cmake.in: update include directories (Samuel Martin),<br/> 779 Adding example from bugs 738805 to regression tests (Daniel Veillard)<br/> 780 </li> 781 782 <li>Cleanups:<br/> 783 </li> 784 </ul> 785 <h3>2.9.2: Oct 16 2014</h3> 786 <ul> 787 <li>Security:<br/> 788 Fix for CVE-2014-3660 billion laugh variant (Daniel Veillard),<br/> 789 CVE-2014-0191 Do not fetch external parameter entities (Daniel Veillard)<br/> 790 </li> 791 792 <li>Bug Fixes:<br/> 793 fix memory leak xml header encoding field with XML_PARSE_IGNORE_ENC (Bart De Schuymer),<br/> 794 xmlmemory: handle realloc properly (Yegor Yefremov),<br/> 795 Python generator bug raised by the const change (Daniel Veillard),<br/> 796 Windows Critical sections not released correctly (Daniel Veillard),<br/> 797 Parser error on repeated recursive entity expansion containing &lt; (Daniel Veillard),<br/> 798 xpointer : fixing Null Pointers (Gaurav Gupta),<br/> 799 Remove Unnecessary Null check in xpointer.c (Gaurav Gupta),<br/> 800 parser bug on misformed namespace attributes (Dennis Filder),<br/> 801 Pointer dereferenced before null check (Daniel Veillard),<br/> 802 Leak of struct addrinfo in xmlNanoFTPConnect() (Gaurav Gupta),<br/> 803 Possible overflow in HTMLParser.c (Daniel Veillard),<br/> 804 python/tests/sync.py assumes Python dictionaries are ordered (John Beck),<br/> 805 Fix Enum check and missing break (Gaurav Gupta),<br/> 806 xmlIO: Handle error returns from dup() (Philip Withnall),<br/> 807 Fix a problem properly saving URIs (Daniel Veillard),<br/> 808 wrong error column in structured error when parsing attribute values (Juergen Keil),<br/> 809 wrong error column in structured error when skipping whitespace in xml decl (Juergen Keil),<br/> 810 no error column in structured error handler for xml schema validation errors (Juergen Keil),<br/> 811 Couple of Missing Null checks (Gaurav Gupta),<br/> 812 Add couple of missing Null checks (Daniel Veillard),<br/> 813 xmlschemastypes: Fix potential array overflow (Philip Withnall),<br/> 814 runtest: Fix a memory leak on parse failure (Philip Withnall),<br/> 815 xmlIO: Fix an FD leak on gzdopen() failure (Philip Withnall),<br/> 816 xmlcatalog: Fix a memory leak on quit (Philip Withnall),<br/> 817 HTMLparser: Correctly initialise a stack allocated structure (Philip Withnall),<br/> 818 Check for tmon in _xmlSchemaDateAdd() is incorrect (David Kilzer),<br/> 819 Avoid Possible Null Pointer in trio.c (Gaurav Gupta),<br/> 820 Fix processing in SAX2 in case of an allocation failure (Daniel Veillard),<br/> 821 XML Shell command "cd" does not handle "/" at end of path (Daniel Veillard),<br/> 822 Fix various Missing Null checks (Gaurav Gupta),<br/> 823 Fix a potential NULL dereference (Daniel Veillard),<br/> 824 Add a couple of misisng check in xmlRelaxNGCleanupTree (Gaurav Gupta),<br/> 825 Add a missing argument check (Gaurav Gupta),<br/> 826 Adding a check in case of allocation error (Gaurav Gupta),<br/> 827 xmlSaveUri() incorrectly recomposes URIs with rootless paths (Dennis Filder),<br/> 828 Adding some missing NULL checks (Gaurav),<br/> 829 Fixes for xmlInitParserCtxt (Daniel Veillard),<br/> 830 Fix regressions introduced by CVE-2014-0191 patch (Daniel Veillard),<br/> 831 erroneously ignores a validation error if no error callback set (Daniel Veillard),<br/> 832 xmllint was not parsing the --c14n11 flag (Srgio Batista),<br/> 833 Avoid Possible null pointer dereference in memory debug mode (Gaurav),<br/> 834 Avoid Double Null Check (Gaurav),<br/> 835 Restore context size and position after XPATH_OP_ARG (Nick Wellnhofer),<br/> 836 Fix xmlParseInNodeContext() if node is not element (Daniel Veillard),<br/> 837 Avoid a possible NULL pointer dereference (Gaurav),<br/> 838 Fix xmlTextWriterWriteElement when a null content is given (Daniel Veillard),<br/> 839 Fix an typo 'onrest' in htmlScriptAttributes (Daniel Veillard),<br/> 840 fixing a ptotential uninitialized access (Daniel Veillard),<br/> 841 Fix an fd leak in an error case (Daniel Veillard),<br/> 842 Missing initialization for the catalog module (Daniel Veillard),<br/> 843 Handling of XPath function arguments in error case (Nick Wellnhofer),<br/> 844 Fix a couple of missing NULL checks (Gaurav),<br/> 845 Avoid a possibility of dangling encoding handler (Gaurav),<br/> 846 Fix HTML push parser to accept HTML_PARSE_NODEFDTD (Arnold Hendriks),<br/> 847 Fix a bug loading some compressed files (Mike Alexander),<br/> 848 Fix XPath node comparison bug (Gaurav),<br/> 849 Type mismatch in xmlschemas.c (Gaurav),<br/> 850 Type mismatch in xmlschemastypes.c (Gaurav),<br/> 851 Avoid a deadcode in catalog.c (Daniel Veillard),<br/> 852 run close socket on Solaris, same as we do on other platforms (Denis Pauk),<br/> 853 Fix pointer dereferenced before null check (Gaurav),<br/> 854 Fix a potential NULL dereference in tree code (Daniel Veillard),<br/> 855 Fix potential NULL pointer dereferences in regexp code (Gaurav),<br/> 856 xmllint --pretty crashed without following numeric argument (Tim Galeckas),<br/> 857 Fix XPath expressions of the form '@ns:*' (Nick Wellnhofer),<br/> 858 Fix XPath '//' optimization with predicates (Nick Wellnhofer),<br/> 859 Clear up a potential NULL dereference (Daniel Veillard),<br/> 860 Fix a possible NULL dereference (Gaurav),<br/> 861 Avoid crash if allocation fails (Daniel Veillard),<br/> 862 Remove occasional leading space in XPath number formatting (Daniel Veillard),<br/> 863 Fix handling of mmap errors (Daniel Veillard),<br/> 864 Catch malloc error and exit accordingly (Daniel Veillard),<br/> 865 missing else in xlink.c (Ami Fischman),<br/> 866 Fix a parsing bug on non-ascii element and CR/LF usage (Daniel Veillard),<br/> 867 Fix a regression in xmlGetDocCompressMode() (Daniel Veillard),<br/> 868 properly quote the namespace uris written out during c14n (Aleksey Sanin),<br/> 869 Remove premature XInclude check on URI being relative (Alexey Neyman),<br/> 870 Fix missing break on last() function for attributes (dcb),<br/> 871 Do not URI escape in server side includes (Romain Bondue),<br/> 872 Fix an error in xmlCleanupParser (Alexander Pastukhov)<br/> 873 </li> 874 875 <li>Documentation:<br/> 876 typo in error messages "colon are forbidden from..." (Daniel Veillard),<br/> 877 Fix a link to James SAX documentation old page (Daniel Veillard),<br/> 878 Fix typos in relaxng.c (Jan Pokorn),<br/> 879 Fix a doc typo (Daniel Veillard),<br/> 880 Fix typos in {tree,xpath}.c (errror) (Jan Pokorn),<br/> 881 Add limitations about encoding conversion (Daniel Veillard),<br/> 882 Fix typos in xmlschemas{,types}.c (Jan Pokorn),<br/> 883 Fix incorrect spelling entites->entities (Jan Pokorn),<br/> 884 Forgot to document 2.9.1 release, regenerate docs (Daniel Veillard)<br/> 885 </li> 886 887 <li>Portability:<br/> 888 AC_CONFIG_FILES and executable bit (Roumen Petrov),<br/> 889 remove HAVE_CONFIG_H dependency in testlimits.c (Roumen Petrov),<br/> 890 fix some tabs mixing incompatible with python3 (Roumen Petrov),<br/> 891 Visual Studio 14 CTP defines snprintf() (Francis Dupont),<br/> 892 OS400: do not try to copy unexisting doc files (Patrick Monnerat),<br/> 893 OS400: use either configure.ac or configure.in. (Patrick Monnerat),<br/> 894 os400: make-src.sh: create physical file with target CCSID (Patrick Monnerat),<br/> 895 OS400: Add some more C macros equivalent procedures. (Patrick Monnerat),<br/> 896 OS400: use C macros to implement equivalent RPG support procedures. (Patrick Monnerat),<br/> 897 OS400: implement XPath macros as procedures for ILE/RPG support. (Patrick Monnerat),<br/> 898 OS400: include in distribution tarball. (Patrick Monnerat),<br/> 899 OS400: Add README: compilation directives and OS/400 specific stuff. (Patrick Monnerat),<br/> 900 OS400: Add compilation scripts. (Patrick Monnerat),<br/> 901 OS400: ILE RPG language header files. (Patrick Monnerat),<br/> 902 OS400: implement some macros as functions for ILE/RPG language support (that as no macros). (Patrick Monnerat),<br/> 903 OS400: UTF8<-->EBCDIC wrappers for system and external library calls (Patrick Monnerat),<br/> 904 OS400: Easy character transcoding support (Patrick Monnerat),<br/> 905 OS400: iconv functions compatibility wrappers and table builder. (Patrick Monnerat),<br/> 906 OS400: create architecture directory. Implement dlfcn emulation. (Patrick Monnerat),<br/> 907 Fix building when configuring without xpath and xptr (Daniel Veillard),<br/> 908 configure: Add --with-python-install-dir (Jonas Eriksson),<br/> 909 Fix compilation with minimum and xinclude. (Nicolas Le Cam),<br/> 910 Compile out use of xmlValidateNCName() when not available. (Nicolas Le Cam),<br/> 911 Fix compilation with minimum and schematron. (Nicolas Le Cam),<br/> 912 Legacy needs xmlSAX2StartElement() and xmlSAX2EndElement(). (Nicolas Le Cam),<br/> 913 Don't use xmlValidateName() when not available. (Nicolas Le Cam),<br/> 914 Fix a portability issue on Windows (Longstreth Jon),<br/> 915 Various portability patches for OpenVMS (Jacob (Jouk) Jansen),<br/> 916 Use specific macros for portability to OS/400 (Patrick Monnerat),<br/> 917 Add macros needed for OS/400 portability (Patrick Monnerat),<br/> 918 Portability patch for fopen on OS/400 (Patrick Monnerat),<br/> 919 Portability fixes for OS/400 (Patrick Monnerat),<br/> 920 Improve va_list portability (Patrick Monnerat),<br/> 921 Portability fix (Patrick Monnerat),<br/> 922 Portability fix (Patrick Monnerat),<br/> 923 Generic portability fix (Patrick Monnerat),<br/> 924 Shortening lines in headers (Patrick Monnerat),<br/> 925 build: Use pkg-config to find liblzma in preference to AC_CHECK_LIB (Philip Withnall),<br/> 926 build: Add @LZMA_LIBS@ to libxmls pkg-config files (Philip Withnall),<br/> 927 fix some tabs mixing incompatible with python3 (Daniel Veillard),<br/> 928 add additional defines checks for support "./configure --with-minimum" (Denis Pauk),<br/> 929 Another round of fixes for older versions of Python (Arfrever Frehtes Taifersar Arahesis),<br/> 930 python: fix drv_libxml2.py for python3 compatibility (Alexandre Rostovtsev),<br/> 931 python: Fix compiler warnings when building python3 bindings (Armin K),<br/> 932 Fix for compilation with python 2.6.8 (Petr Sumbera)<br/> 933 </li> 934 935 <li>Improvements:<br/> 936 win32/libxml2.def.src after rebuild in doc (Roumen Petrov),<br/> 937 elfgcchack.h: more legacy needs xmlSAX2StartElement() and xmlSAX2EndElement() (Roumen Petrov),<br/> 938 elfgcchack.h: add xmlXPathNodeEval and xmlXPathSetContextNode (Roumen Petrov),<br/> 939 Provide cmake module (Samuel Martin),<br/> 940 Fix a couple of issues raised by make dist (Daniel Veillard),<br/> 941 Fix and add const qualifiers (Kurt Roeckx),<br/> 942 Preparing for upcoming release of 2.9.2 (Daniel Veillard),<br/> 943 Fix zlib and lzma libraries check via command line (Dmitriy),<br/> 944 wrong error column in structured error when parsing end tag (Juergen Keil),<br/> 945 doc/news.html: small update to avoid line join while generating NEWS. (Patrick Monnerat),<br/> 946 Add methods for python3 iterator (Ron Angeles),<br/> 947 Support element node traversal in document fragments. (Kyle VanderBeek),<br/> 948 xmlNodeSetName: Allow setting the name to a substring of the currently set name (Tristan Van Berkom),<br/> 949 Added macros for argument casts (Eric Zurcher),<br/> 950 adding init calls to xml and html Read parsing entry points (Daniel Veillard),<br/> 951 Get rid of 'REPLACEMENT CHARACTER' Unicode chars in xmlschemas.c (Jan Pokorn),<br/> 952 Implement choice for name classes on attributes (Shaun McCance),<br/> 953 Two small namespace tweaks (Daniel Veillard),<br/> 954 xmllint --memory should fail on empty files (Daniel Veillard),<br/> 955 Cast encoding name to char pointer to match arg type (Nikolay Sivov)<br/> 956 </li> 957 958 <li>Cleanups:<br/> 959 Removal of old configure.in (Daniel Veillard),<br/> 960 Unreachable code in tree.c (Gaurav Gupta),<br/> 961 Remove a couple of dead conditions (Gaurav Gupta),<br/> 962 Avoid some dead code and cleanup in relaxng.c (Gaurav),<br/> 963 Drop not needed checks (Denis Pauk),<br/> 964 Fix a wrong test (Daniel Veillard)<br/> 965 </li> 966 </ul> 967 <h3>2.9.1: Apr 19 2013</h3> 968 <ul> 969 <li> Features:<br/> 970 Support for Python3 (Daniel Veillard),<br/> 971 Add xmlXPathSetContextNode and xmlXPathNodeEval (Alex Bligh)<br/> 972 </li> 973 974 <li> Documentation:<br/> 975 Add documentation for xmllint --xpath (Daniel Veillard),<br/> 976 Fix the URL of the SAX documentation from James (Daniel Veillard),<br/> 977 Fix spelling of "length". (Michael Wood)<br/> 978 </li> 979 980 <li> Portability:<br/> 981 Fix python bindings with versions older than 2.7 (Daniel Veillard),<br/> 982 rebuild docs:Makefile.am (Roumen Petrov),<br/> 983 elfgcchack.h after rebuild in doc (Roumen Petrov),<br/> 984 elfgcchack for buf module (Roumen Petrov),<br/> 985 Fix a uneeded and wrong extra link parameter (Daniel Veillard),<br/> 986 Few cleanup patches for Windows (Denis Pauk),<br/> 987 Fix rpmbuild --nocheck (Mark Salter),<br/> 988 Fix for win32/configure.js and WITH_THREAD_ALLOC (Daniel Richard),<br/> 989 Fix Broken multi-arch support in xml2-config (Daniel Veillard),<br/> 990 Fix a portability issue for GCC < 3.4.0 (Daniel Veillard),<br/> 991 Windows build fixes (Daniel Richard),<br/> 992 Fix a thread portability problem (Friedrich Haubensak),<br/> 993 Downgrade autoconf requirement to 2.63 (Daniel Veillard)<br/> 994 </li> 995 996 <li> Bug Fixes:<br/> 997 Fix a linking error for python bindings (Daniel Veillard),<br/> 998 Fix a couple of return without value (Jri Aedla),<br/> 999 Improve the hashing functions (Daniel Franke),<br/> 1000 Improve handling of xmlStopParser() (Daniel Veillard),<br/> 1001 Remove risk of lockup in dictionary initialization (Daniel Veillard),<br/> 1002 Activate detection of encoding in external subset (Daniel Veillard),<br/> 1003 Fix an output buffer flushing conversion bug (Mikhail Titov),<br/> 1004 Fix an old bug in xmlSchemaValidateOneElement (Csaba Lszl),<br/> 1005 Fix configure cannot remove messages (Gilles Espinasse),<br/> 1006 fix schema validation in combination with xsi:nil (Daniel Veillard),<br/> 1007 xmlCtxtReadFile doesn't work with literal IPv6 URLs (Steve Wolf),<br/> 1008 Fix a few problems with setEntityLoader (Alexey Neyman),<br/> 1009 Detect excessive entities expansion upon replacement (Daniel Veillard),<br/> 1010 Fix the flushing out of raw buffers on encoding conversions (Daniel,<br/> 1011 Veillard),<br/> 1012 Fix some buffer conversion issues (Daniel Veillard),<br/> 1013 When calling xmlNodeDump make sure we grow the buffer quickly (Daniel,<br/> 1014 Veillard),<br/> 1015 Fix an error in the progressive DTD parsing code (Dan Winship),<br/> 1016 xmllint should not load DTD by default when using the reader (Daniel,<br/> 1017 Veillard),<br/> 1018 Try IBM-037 when looking for EBCDIC handlers (Petr Sumbera),<br/> 1019 Fix potential out of bound access (Daniel Veillard),<br/> 1020 Fix large parse of file from memory (Daniel Veillard),<br/> 1021 Fix a bug in the nsclean option of the parser (Daniel Veillard),<br/> 1022 Fix a regression in 2.9.0 breaking validation while streaming (Daniel,<br/> 1023 Veillard),<br/> 1024 Remove potential calls to exit() (Daniel Veillard)<br/> 1025 </li> 1026 1027 <li> Improvements:<br/> 1028 Regenerated API, and testapi, rebuild documentation (Daniel Veillard),<br/> 1029 Fix tree iterators broken by 2to3 script (Daniel Veillard),<br/> 1030 update all tests for Python3 and Python2 (Daniel Veillard),<br/> 1031 A few more fixes for python 3 affecting libxml2.py (Daniel Veillard),<br/> 1032 Fix compilation on Python3 (Daniel Veillard),<br/> 1033 Converting apibuild.py to python3 (Daniel Veillard),<br/> 1034 First pass at starting porting to python3 (Daniel Veillard),<br/> 1035 updated configure.in for python3 (Daniel Veillard),<br/> 1036 Add support for xpathRegisterVariable in Python (Shaun McCance),<br/> 1037 Added a regression tests from bug 694228 data (Daniel Veillard),<br/> 1038 Cache presence of '<' in entities content (Daniel Veillard),<br/> 1039 Avoid extra processing on entities (Daniel Veillard),<br/> 1040 Python binding for xmlRegisterInputCallback (Alexey Neyman),<br/> 1041 Python bindings: DOM casts everything to xmlNode (Alexey Neyman),<br/> 1042 Define LIBXML_THREAD_ALLOC_ENABLED via xmlversion.h (Tim Starling),<br/> 1043 Adding streaming validation to runtest checks (Daniel Veillard),<br/> 1044 Add a --pushsmall option to xmllint (Daniel Veillard)<br/> 1045 </li> 1046 1047 <li> Cleanups:<br/> 1048 Switched comment in file to UTF-8 encoding (Daniel Veillard),<br/> 1049 Extend gitignore (Daniel Veillard),<br/> 1050 Silent the new python test on input (Alexey Neyman),<br/> 1051 Cleanup of a duplicate test (Daniel Veillard),<br/> 1052 Cleanup on duplicate test expressions (Daniel Veillard),<br/> 1053 Fix compiler warning after 153cf15905cf4ec080612ada6703757d10caba1e (Patrick,<br/> 1054 Gansterer),<br/> 1055 Spec cleanups and a fix for multiarch support (Daniel Veillard),<br/> 1056 Silence a clang warning (Daniel Veillard),<br/> 1057 Cleanup the Copyright to be pure MIT Licence wording (Daniel Veillard),<br/> 1058 rand_seed should be static in dict.c (Wouter Van Rooy),<br/> 1059 Fix typos in parser comments (Jan Pokorn)<br/> 1060 </li> 1061 </ul> 1062 <h3>2.9.0: Sep 11 2012</h3> 1063 <ul> 1064 <li> Features:<br/> 1065 A few new API entry points,<br/> 1066 More resilient push parser mode,<br/> 1067 A lot of portability improvement,<br/> 1068 Faster XPath evaluation<br/> 1069 </li> 1070 1071 <li> Documentation:<br/> 1072 xml2-config.1 markup error (Christian Weisgerber),<br/> 1073 libxml(3) manpage typo fix (John Bradshaw),<br/> 1074 More cleanups to the documentation part of libxml2 (Daniel Richard G)<br/> 1075 </li> 1076 1077 <li> Portability:<br/> 1078 Bug 676544 - fails to build with --without-sax1 (Akira TAGOH),<br/> 1079 fix builds not having stdint.h (Rob Richards),<br/> 1080 GetProcAddressA is available only on WinCE (Daniel Veillard),<br/> 1081 More updates and cleanups on autotools and Makefiles (Daniel Richard G),<br/> 1082 More changes for Win32 compilation (Eric Zurcher),<br/> 1083 Basic changes for Win32 builds of release 2.9.0: compile buf.c (Eric Zurcher),<br/> 1084 Bundles all generated files for python into the distribution (Daniel Richard G),<br/> 1085 Fix compiler warnings of wincecompat.c (Patrick Gansterer),<br/> 1086 Fix non __GNUC__ build (Patrick Gansterer),<br/> 1087 Fix windows unicode build (Patrick Gansterer),<br/> 1088 clean redefinition of {v}snprintf in C-source (Roumen Petrov),<br/> 1089 use xmlBuf... if DEBUG_INPUT is defined (Roumen Petrov),<br/> 1090 fix runtests to use pthreads support for various Unix platforms (Daniel Richard G),<br/> 1091 Various "make distcheck" and portability fixups 2nd part (Daniel Richard G),<br/> 1092 Various "make distcheck" and portability fixups (Daniel Richard G),<br/> 1093 Fix compilation on older Visual Studio (Daniel Veillard)<br/> 1094 </li> 1095 1096 <li> Bug Fixes:<br/> 1097 Change the XPath code to percolate allocation errors (Daniel Veillard),<br/> 1098 Fix reuse of xmlInitParser (Daniel Veillard),<br/> 1099 Fix potential crash on entities errors (Daniel Veillard),<br/> 1100 initialize var (Rob Richards),<br/> 1101 Fix the XPath arity check to also check the XPath stack limits (Daniel Veillard),<br/> 1102 Fix problem with specific and generic error handlers (Pietro Cerutti),<br/> 1103 Avoid a potential infinite recursion (Daniel Veillard),<br/> 1104 Fix an XSD error when generating internal automata (Daniel Veillard),<br/> 1105 Patch for xinclude of text using multibyte characters (Vitaly Ostanin),<br/> 1106 Fix a segfault on XSD validation on pattern error (Daniel Veillard),<br/> 1107 Fix missing xmlsave.h module which was ignored in recent builds (Daniel Veillard),<br/> 1108 Add a missing element check (Daniel Veillard),<br/> 1109 Adding various checks on node type though the API (Daniel Veillard),<br/> 1110 Namespace nodes can't be unlinked with xmlUnlinkNode (Daniel Veillard),<br/> 1111 Fix make dist to include new private header files (Daniel Veillard),<br/> 1112 More fixups on the push parser behaviour (Daniel Veillard),<br/> 1113 Strengthen behaviour of the push parser in problematic situations (Daniel Veillard),<br/> 1114 Enforce XML_PARSER_EOF state handling through the parser (Daniel Veillard),<br/> 1115 Fixup limits parser (Daniel Veillard),<br/> 1116 Do not fetch external parsed entities (Daniel Veillard),<br/> 1117 Fix an error in previous commit (Aron Xu),<br/> 1118 Fix entities local buffers size problems (Daniel Veillard),<br/> 1119 Fix parser local buffers size problems (Daniel Veillard),<br/> 1120 Fix a failure to report xmlreader parsing failures (Daniel Veillard)<br/> 1121 </li> 1122 1123 <li> Improvements:<br/> 1124 Keep libxml2.syms when running "make distclean" (Daniel Veillard),<br/> 1125 Allow to set the quoting character of an xmlWriter (Csaba Raduly),<br/> 1126 Keep non-significant blanks node in HTML parser (Daniel Veillard),<br/> 1127 Add a forbidden variable error number and message to XPath (Daniel Veillard),<br/> 1128 Support long path names on WNT (Michael Stahl),<br/> 1129 Improve HTML escaping of attribute on output (Daniel Veillard),<br/> 1130 Handle ICU_LIBS as LIBADD, not LDFLAGS to prevent linking errors (Arfrever Frehtes Taifersar Arahesis),<br/> 1131 Switching XPath node sorting to Timsort (Vojtech Fried),<br/> 1132 Optimizing '//' in XPath expressions (Nick Wellnhofer),<br/> 1133 Expose xmlBufShrink in the public tree API (Daniel Veillard),<br/> 1134 Visible HTML elements close the head tag (Conrad Irwin),<br/> 1135 Fix file and line report for XSD SAX and reader streaming validation (Daniel Veillard),<br/> 1136 Fix const qualifyer to definition of xmlBufferDetach (Daniel Veillard),<br/> 1137 minimize use of HAVE_CONFIG_H (Roumen Petrov),<br/> 1138 fixup regression in Various "make distcheck" and portability fixups (Roumen Petrov),<br/> 1139 Add support for big line numbers in error reporting (Daniel Veillard),<br/> 1140 Avoid using xmlBuffer for serialization (Daniel Veillard),<br/> 1141 Improve compatibility between xmlBuf and xmlBuffer (Daniel Veillard),<br/> 1142 Provide new accessors for xmlOutputBuffer (Daniel Veillard),<br/> 1143 Improvements for old buffer compatibility (Daniel Veillard),<br/> 1144 Expand the limit test program (Daniel Veillard),<br/> 1145 Improve error reporting on parser errors (Daniel Veillard),<br/> 1146 Implement some default limits in the XPath module (Daniel Veillard),<br/> 1147 Introduce some default parser limits (Daniel Veillard),<br/> 1148 Cleanups and new limit APIs for dictionaries (Daniel Veillard),<br/> 1149 Fixup for buf.c (Daniel Veillard),<br/> 1150 Cleanup URI module memory allocation code (Daniel Veillard),<br/> 1151 Extend testlimits (Daniel Veillard),<br/> 1152 More avoid quadratic behaviour (Daniel Veillard),<br/> 1153 Impose a reasonable limit on PI size (Daniel Veillard),<br/> 1154 first version of testlimits new test (Daniel Veillard),<br/> 1155 Avoid quadratic behaviour in some push parsing cases (Daniel Veillard),<br/> 1156 Impose a reasonable limit on comment size (Daniel Veillard),<br/> 1157 Impose a reasonable limit on attribute size (Daniel Veillard),<br/> 1158 Harden the buffer code and make it more compatible (Daniel Veillard),<br/> 1159 More cleanups for input/buffers code (Daniel Veillard),<br/> 1160 Cleanup function xmlBufResetInput(),<br/> to set input from Buffer (Daniel Veillard) 1161 Swicth the test program for characters to new input buffers (Daniel Veillard),<br/> 1162 Convert the HTML tree module to the new buffers (Daniel Veillard),<br/> 1163 Convert of the HTML parser to new input buffers (Daniel Veillard),<br/> 1164 Convert the writer to new output buffer and save APIs (Daniel Veillard),<br/> 1165 Convert XMLReader to the new input buffers (Daniel Veillard),<br/> 1166 New saving functions using xmlBuf and conversion (Daniel Veillard),<br/> 1167 Provide new xmlBuf based saving functions (Daniel Veillard),<br/> 1168 Convert XInclude to the new input buffers (Daniel Veillard),<br/> 1169 Convert catalog code to the new input buffers (Daniel Veillard),<br/> 1170 Convert C14N to the new Input buffer (Daniel Veillard),<br/> 1171 Convert xmlIO.c to the new input and output buffers (Daniel Veillard),<br/> 1172 Convert XML parser to the new input buffers (Daniel Veillard),<br/> 1173 Incompatible change to the Input and Output buffers (Daniel Veillard),<br/> 1174 Adding new encoding function to deal with the new structures (Daniel Veillard),<br/> 1175 Convert XPath to xmlBuf (Daniel Veillard),<br/> 1176 Adding a new buf module for buffers (Daniel Veillard),<br/> 1177 Memory error within SAX2 reuse common framework (Daniel Veillard),<br/> 1178 Fix xmllint --xpath node initialization (Daniel Veillard)<br/> 1179 </li> 1180 1181 <li> Cleanups:<br/> 1182 Various cleanups to avoid compiler warnings (Daniel Veillard),<br/> 1183 Big space and tab cleanup (Daniel Veillard),<br/> 1184 Followup to LibXML2 docs/examples cleanup patch (Daniel Veillard),<br/> 1185 Second round of cleanups for LibXML2 docs/examples (Daniel Richard),<br/> 1186 Remove all .cvsignore as they are not used anymore (Daniel Veillard),<br/> 1187 Fix a Timsort function helper comment (Daniel Veillard),<br/> 1188 Small cleanup for valgrind target (Daniel Veillard),<br/> 1189 Patch for portability of latin characters in C files (Daniel Veillard),<br/> 1190 Cleanup some of the parser code (Daniel Veillard),<br/> 1191 Fix a variable name in comment (Daniel Veillard),<br/> 1192 Regenerated testapi.c (Daniel Veillard),<br/> 1193 Regenerating docs and API files (Daniel Veillard),<br/> 1194 Small cleanup of unused variables in test (Daniel Veillard),<br/> 1195 Expand .gitignore with more files (Daniel Veillard)<br/> 1196 </li> 1197 </ul> 1198 <h3>2.8.0: May 23 2012</h3> 1199 <ul> 1200 <li>Features: 1201 add lzma compression support (Anders F Bjorklund) 1202 </li> 1203 1204 <li>Documentation: 1205 xmlcatalog: Add uri and delegateURI to possible add types in man page. (Ville Skytt), 1206 Update README.tests (Daniel Veillard), 1207 URI handling code is not OOM resilient (Daniel Veillard), 1208 Fix an error in comment (Daniel Veillard), 1209 Fixed bug #617016 (Daniel Mustieles), 1210 Fixed two typos in the README document (Daniel Neel), 1211 add generated html files (Anders F Bjorklund), 1212 Clarify the need to use xmlFreeNode after xmlUnlinkNode (Daniel Veillard), 1213 Improve documentation a bit (Daniel Veillard), 1214 Updated URL for lxml python bindings (Daniel Veillard) 1215 </li> 1216 1217 <li>Portability: 1218 Restore code for Windows compilation (Daniel Veillard), 1219 Remove git error message during configure (Christian Dywan), 1220 xmllint: Build fix for endTimer if !defined(HAVE_GETTIMEOFDAY) (Patrick R. Gansterer), 1221 remove a bashism in confgure.in (John Hein), 1222 undef ERROR if already defined (Patrick R. Gansterer), 1223 Fix library problems with mingw-w64 (Michael Cronenworth), 1224 fix windows build. ifdef addition from bug 666491 makes no sense (Rob Richards), 1225 prefer native threads on win32 (Sam Thursfield), 1226 Allow to compile with Visual Studio 2010 (Thomas Lemm), 1227 Fix mingw's snprintf configure check (Andoni Morales), 1228 fixed a 64bit big endian issue (Marcus Meissner), 1229 Fix portability failure if netdb.h lacks NO_ADDRESS (Daniel Veillard), 1230 Fix windows build from lzma addition (Rob Richards), 1231 autogen: Only check for libtoolize (Colin Walters), 1232 Fix the Windows build files (Patrick von Reth), 1233 634846 Remove a linking option breaking Windows VC10 (Daniel Veillard), 1234 599241 fix an initialization problem on Win64 (Andrew W. Nosenko), 1235 fix win build (Rob Richards) 1236 </li> 1237 1238 <li>Bug fixes: 1239 Part for rand_r checking missing (Daniel Veillard), 1240 Cleanup on randomization (Daniel Veillard), 1241 Fix undefined reference in python module (Pacho Ramos), 1242 Fix a race in xmlNewInputStream (Daniel Veillard), 1243 Fix weird streaming RelaxNG errors (Noam), 1244 Fix various bugs in new code raised by the API checking (Daniel Veillard), 1245 Fix various problems with "make dist" (Daniel Veillard), 1246 Fix a memory leak in the xzlib code (Daniel Veillard), 1247 HTML parser error with <noscript> in the <head> (Denis Pauk), 1248 XSD: optional element in complex type extension (Remi Gacogne), 1249 Fix html serialization error and htmlSetMetaEncoding() (Daniel Veillard), 1250 Fix a wrong return value in previous patch (Daniel Veillard), 1251 Fix an uninitialized variable use (Daniel Veillard), 1252 Fix a compilation problem with --minimum (Brandon Slack), 1253 Remove redundant and ungarded include of resolv.h (Daniel Veillard), 1254 xinclude with parse="text" does not use the entity loader (Shaun McCance), 1255 Allow to parse 1 byte HTML files (Denis Pauk), 1256 Patch that fixes the skipping of the HTML_PARSE_NOIMPLIED flag (Martin Schrder), 1257 Avoid memory leak if xmlParserInputBufferCreateIO fails (Lin Yi-Li), 1258 Prevent an infinite loop when dumping a node with encoding problems (Timothy Elliott), 1259 xmlParseNodeInContext problems with an empty document (Tim Elliott), 1260 HTML element position is not detected propperly (Pavel Andrejs), 1261 Fix an off by one pointer access (Jri Aedla), 1262 Try to fix a problem with entities in SAX mode (Daniel Veillard), 1263 Fix a crash with xmllint --path on empty results (Daniel Veillard), 1264 Fixed bug #667946 (Daniel Mustieles), 1265 Fix a logic error in Schemas Component Constraints (Ryan Sleevi), 1266 Fix a wrong enum type use in Schemas Types (Nico Weber), 1267 Fix SAX2 builder in case of undefined attributes namespace (Daniel Veillard), 1268 Fix SAX2 builder in case of undefined element namespaces (Daniel Veillard), 1269 fix reference to STDOUT_FILENO on MSVC (Tay Ray Chuan), 1270 fix a pair of possible out of array char references (Daniel Veillard), 1271 Fix an allocation error when copying entities (Daniel Veillard), 1272 Make sure the parser returns when getting a Stop order (Chris Evans), 1273 Fix some potential problems on reallocation failures(parser.c) (Xia Xinfeng), 1274 Fix a schema type duration comparison overflow (Daniel Veillard), 1275 Fix an unimplemented part in RNG value validation (Daniel Veillard), 1276 Fix missing error status in XPath evaluation (Daniel Veillard), 1277 Hardening of XPath evaluation (Daniel Veillard), 1278 Fix an off by one error in encoding (Daniel Veillard), 1279 Fix RELAX NG include bug #655288 (Shaun McCance), 1280 Fix XSD validation bug #630130 (Toyoda Eizi), 1281 Fix some potential problems on reallocation failures (Chris Evans), 1282 __xmlRaiseError: fix use of the structured callback channel (Dmitry V. Levin), 1283 __xmlRaiseError: fix the structured callback channel's data initialization (Dmitry V. Levin), 1284 Fix memory corruption when xmlParseBalancedChunkMemoryInternal is called from xmlParseBalancedChunk (Rob Richards), 1285 Small fix for previous commit (Daniel Veillard), 1286 Fix a potential freeing error in XPath (Daniel Veillard), 1287 Fix a potential memory access error (Daniel Veillard), 1288 Reactivate the shared library versionning script (Daniel Veillard) 1289 </li> 1290 1291 <li>Improvements: 1292 use mingw C99 compatible functions {v}snprintf instead those from MSVC runtime (Roumen Petrov), 1293 New symbols added for the next release (Daniel Veillard), 1294 xmlTextReader bails too quickly on error (Andy Lutomirski), 1295 Use a hybrid allocation scheme in xmlNodeSetContent (Conrad Irwin), 1296 Use buffers when constructing string node lists. (Conrad Irwin), 1297 Add HTML parser support for HTML5 meta charset encoding declaration (Denis Pauk), 1298 wrong message for double hyphen in comment XML error (Bryan Henderson), 1299 Fix "make tst" to grab lzma lib too (Daniel Veillard), 1300 Add "whereis" command to xmllint shell (Ryan), 1301 Improve xmllint shell (Ryan), 1302 add function xmlTextReaderRelaxNGValidateCtxt() (Noam Postavsky), 1303 Add --system support to autogen.sh (Daniel Veillard), 1304 Add hash randomization to hash and dict structures (Daniel Veillard), 1305 included xzlib in dist (Anders F Bjorklund), 1306 move xz/lzma helpers to separate included files (Anders F Bjorklund), 1307 add generated devhelp files (Anders F Bjorklund), 1308 add XML_WITH_LZMA to api (Anders F Bjorklund), 1309 autogen.sh: Honor NOCONFIGURE environment variable (Colin Walters), 1310 Improve the error report on undefined REFs (Daniel Veillard), 1311 Add exception for new W3C PI xml-model (Daniel Veillard), 1312 Add options to ignore the internal encoding (Daniel Veillard), 1313 testapi: use the right type for the check (Stefan Kost), 1314 various: handle return values of write calls (Stefan Kost), 1315 testWriter: xmlTextWriterWriteFormatElement wants an int instead of a long int (Stefan Kost), 1316 runxmlconf: update to latest testsuite version (Stefan Kost), 1317 configure: add -Wno-long-long to CFLAGS (Stefan Kost), 1318 configure: support silent automake rules if possible (Stefan Kost), 1319 xmlmemory: add a cast as size_t has no portable printf modifier (Stefan Kost), 1320 __xmlRaiseError: remove redundant schannel initialization (Dmitry V. Levin), 1321 __xmlRaiseError: do cheap code check early (Dmitry V. Levin) 1322 </li> 1323 1324 <li>Cleanups: 1325 Cleanups before 2.8.0-rc2 (Daniel Veillard), 1326 Avoid an extra operation (Daniel Veillard), 1327 Remove vestigial de-ANSI-fication support. (Javier Jardn), 1328 autogen.sh: Fix typo (Javier Jardn), 1329 Do not use unsigned but unsigned int (Daniel Veillard), 1330 Remove two references to u_short (Daniel Veillard), 1331 Fix -Wempty-body warning from clang (Nico Weber), 1332 Cleanups of lzma support (Daniel Veillard), 1333 Augment the list of ignored files (Daniel Veillard), 1334 python: remove unused variable (Stefan Kost), 1335 python: flag two unused args (Stefan Kost), 1336 configure: acconfig.h is deprecated since autoconf-2.50 (Stefan Kost), 1337 xpath: remove unused variable (Stefan Kost) 1338 </li> 1339 </ul> 1340 <h3>2.7.8: Nov 4 2010</h3> 1341 <ul> 1342 <li> Features: 1343 480323 add code to plug in ICU converters by default (Giuseppe Iuculano), 1344 Add xmlSaveOption XML_SAVE_WSNONSIG (Adam Spragg) 1345 </li> 1346 <li> Documentation: 1347 Fix devhelp documentation installation (Mike Hommey), 1348 Fix web site encoding problems (Daniel Veillard), 1349 Fix a couple of typo in HTML parser error messages (Michael Day), 1350 Forgot to update the news page for 0.7.7 (Daniel Veillard) 1351 </li> 1352 <li> Portability: 1353 607273 Fix python detection on MSys/Windows (LRN), 1354 614087 Fix Socket API usage to allow Windows64 compilation (Ozkan Sezer), 1355 Fix compilation with Clang (Koop Mast), 1356 Fix Win32 build (Rob Richards) 1357 </li> 1358 <li> Bug Fixes: 1359 595789 fix a remaining potential Solaris problem (Daniel Veillard), 1360 617468 fix progressive HTML parsing with style using "'" (Denis Pauk), 1361 616478 Fix xmllint shell write command (Gwenn Kahz), 1362 614005 Possible erroneous HTML parsing on unterminated script (Pierre Belzile), 1363 627987 Fix XSD IDC errors in imported schemas (Jim Panetta), 1364 629325 XPath rounding errors first cleanup (Phil Shafer), 1365 630140 fix iso995x encoding error (Daniel Veillard), 1366 make sure htmlCtxtReset do reset the disableSAX field (Daniel Veillard), 1367 Fix a change of semantic on XPath preceding and following axis (Daniel Veillard), 1368 Fix a potential segfault due to weak symbols on pthreads (Mike Hommey), 1369 Fix a leak in XPath compilation (Daniel Veillard), 1370 Fix the semantic of XPath axis for namespace/attribute context nodes (Daniel Veillard), 1371 Avoid a descriptor leak in catalog loading code (Carlo Bramini), 1372 Fix a small bug in XPath evaluation code (Marius Wachtler), 1373 Fix handling of XML-1.0 XML namespace declaration (Daniel Veillard), 1374 Fix errors in XSD double validation check (Csaba Raduly), 1375 Fix handling of apos in URIs (Daniel Veillard), 1376 xmlTextReaderReadOuterXml should handle DTD (Rob Richards), 1377 Autogen.sh needs to create m4 directory (Rob Richards) 1378 </li> 1379 <li> Improvements: 1380 606592 update language ID parser to RFC 5646 (Daniel Veillard), 1381 Sort python generated stubs (Mike Hommey), 1382 Add an HTML parser option to avoid a default doctype (Daniel Veillard) 1383 </li> 1384 <li> Cleanups: 1385 618831 don't ship generated files in git (Adrian Bunk), 1386 Switch from the obsolete mkinstalldirs to AC_PROG_MKDIR_P (Adrian Bunk), 1387 Various cleanups on encoding handling (Daniel Veillard), 1388 Fix xmllint to use format=1 for default formatting (Adam Spragg), 1389 Force _xmlSaveCtxt.format to be 0 or 1 (Adam Spragg), 1390 Cleanup encoding pointer comparison (Nikolay Sivov), 1391 Small code cleanup on previous patch (Daniel Veillard) 1392 </li> 1393 </ul> 1394 <h3>2.7.7: Mar 15 2010</h3> 1395 <ul> 1396 <li> Improvements: 1397 Adding a --xpath option to xmllint (Daniel Veillard), 1398 Make HTML parser non-recursive (Eugene Pimenov) 1399 </li> 1400 <li> Portability: 1401 relaxng.c: cast to allow compilation with sun studio 11 (Ben Walton), 1402 Fix build failure on Sparc solaris (Roumen Petrov), 1403 use autoreconf in autogen.sh (Daniel Veillard), 1404 Fix build with mingw (Roumen Petrov), 1405 Upgrade some of the configure and autogen (Daniel Veillard), 1406 Fix relaxNG tests in runtest for Windows runtest.c: initialize ret (Rob Richards), 1407 Fix a const warning in xmlNodeSetBase (Martin Trappel), 1408 Fix python generator to not use deprecated xmllib (Daniel Veillard), 1409 Update some automake files (Daniel Veillard), 1410 598785 Fix nanohttp on Windows (spadix) 1411 </li> 1412 <li> Bug Fixes: 1413 libxml violates the zlib interface and crashes (Mark Adler), 1414 Fix broken escape behaviour in regexp ranges (Daniel Veillard), 1415 Fix missing win32 libraries in libxml-2.0.pc (Volker Grabsch), 1416 Fix detection of python linker flags (Daniel Macks), 1417 fix build error in libxml2/python (Paul Smith), 1418 ChunkParser: Incorrect decoding of small xml files (Raul Hudea), 1419 htmlCheckEncoding doesn't update input-end after shrink (Eugene Pimenov), 1420 Fix a missing #ifdef (Daniel Veillard), 1421 Fix encoding selection for xmlParseInNodeContext (Daniel Veillard), 1422 xmlPreviousElementSibling mistake (Franois Delyon), 1423 608773 add a missing check in xmlGROW (Daniel Veillard), 1424 Fix xmlParseInNodeContext for HTML content (Daniel Veillard), 1425 Fix lost namespace when copying node * tree.c: reconcile namespace if not found (Rob Richards), 1426 Fix some missing commas in HTML element lists (Eugene Pimenov), 1427 Correct variable type to unsigned (Nikolay Sivov), 1428 Recognize ID attribute in HTML without DOCTYPE (Daniel Veillard), 1429 Fix memory leak in xmlXPathEvalExpression() (Martin), 1430 Fix an init bug in global.c (Kai Henning), 1431 Fix xmlNodeSetBase() comment (Daniel Veillard), 1432 Fix broken escape behaviour in regexp ranges (Daniel Veillard), 1433 Don't give default HTML boolean attribute values in parser (Daniel Veillard), 1434 xmlCtxtResetLastError should reset ctxt-errNo (Daniel Veillard) 1435 </li> 1436 <li> Cleanups: 1437 Cleanup a couple of weirdness in HTML parser (Eugene Pimenov) 1438 </li> 1439 </ul> 1440 <h3>2.7.6: Oct 6 2009</h3> 1441 <ul> 1442 <li> Bug Fixes: 1443 Restore thread support in default configuration (Andrew W. Nosenko), 1444 URI with no path parsing problem (Daniel Veillard), 1445 Minor patch for conditional defines in threads.c (Eric Zurcher) 1446 </li> 1447 </ul> 1448 <h3>2.7.5: Sep 24 2009</h3> 1449 <ul> 1450 <li> Bug Fixes: 1451 Restore behavior of --with-threads without argument (Andrew W. Nosenko), 1452 Fix memory leak when doc is NULL (Rob Richards), 1453 595792 fixing a RelaxNG bug introduced in 2.7.4 (Daniel Veillard), 1454 Fix a Relaxng bug raised by libvirt test suite (Daniel Veillard), 1455 Fix a parsing problem with little data at startup (Daniel Veillard), 1456 link python module with python library (Frederic Crozat), 1457 594874 Forgot an fclose in xmllint (Daniel Veillard) 1458 </li> 1459 <li> Cleanup: 1460 Adding symbols.xml to EXTRA_DIST (Daniel Veillard) 1461 </li> 1462 </ul> 1463 <h3>2.7.4: Sep 10 2009</h3> 1464 <ul> 1465 <li>Improvements: 1466 Switch to GIT (GNOME), 1467 Add symbol versioning to libxml2 shared libs (Daniel Veillard) 1468 </li> 1469 <li>Portability: 1470 593857 try to work around thread pbm MinGW 4.4 (Daniel Veillard), 1471 594250 rename ATTRIBUTE_ALLOC_SIZE to avoid clashes (Daniel Veillard), 1472 Fix Windows build * relaxng.c: fix windows build (Rob Richards), 1473 Fix the globals.h to use XMLPUBFUN (Paul Smith), 1474 Problem with extern extern in header (Daniel Veillard), 1475 Add -lnetwork for compiling on Haiku (Scott McCreary), 1476 Runtest portability patch for Solaris (Tim Rice), 1477 Small patch to accomodate the Haiku OS (Scott McCreary), 1478 584605 package VxWorks folder in the distribution (Daniel Veillard), 1479 574017 Realloc too expensive on most platform (Daniel Veillard), 1480 Fix windows build (Rob Richards), 1481 545579 doesn't compile without schema support (Daniel Veillard), 1482 xmllint use xmlGetNodePath when not compiled in (Daniel Veillard), 1483 Try to avoid __imp__xmlFree link trouble on msys (Daniel Veillard), 1484 Allow to select the threading system on Windows (LRN), 1485 Fix Solaris binary links, cleanups (Daniel Veillard), 1486 Bug 571059 MSVC doesn't work with the bakefile (Intron), 1487 fix ATTRIBUTE_PRINTF header clash (Belgabor and Mike Hommey), 1488 fixes for Borland/CodeGear/Embarcadero compilers (Eric Zurcher) 1489 </li> 1490 <li>Documentation: 1491 544910 typo: "renciliateNs" (Leonid Evdokimov), 1492 Add VxWorks to list of OSes (Daniel Veillard), 1493 Regenerate the documentation and update for git (Daniel Veillard), 1494 560524 xmlTextReaderLocalName description (Daniel Veillard), 1495 Added sponsoring by AOE media for the server (Daniel Veillard), 1496 updated URLs for GNOME (Vincent Lefevre), 1497 more warnings about xmlCleanupThreads and xmlCleanupParser (Daniel Veillard) 1498 </li> 1499 <li>Bug fixes: 1500 594514 memory leaks - duplicate initialization (MOD), 1501 Wrong block opening in htmlNodeDumpOutputInternal (Daniel Veillard), 1502 492317 Fix Relax-NG validation problems (Daniel Veillard), 1503 558452 fight with reg test and error report (Daniel Veillard), 1504 558452 RNG compilation of optional multiple child (Daniel Veillard), 1505 579746 XSD validation not correct / nilable groups (Daniel Veillard), 1506 502960 provide namespace stack when parsing entity (Daniel Veillard), 1507 566012 part 2 fix regresion tests and push mode (Daniel Veillard), 1508 566012 autodetected encoding and encoding conflict (Daniel Veillard), 1509 584220 xpointer(/) and xinclude problems (Daniel Veillard), 1510 587663 Incorrect Attribute-Value Normalization (Daniel Veillard), 1511 444994 HTML chunked failure for attribute with <> (Daniel Veillard), 1512 Fix end of buffer char being split in XML parser (Daniel Veillard), 1513 Non ASCII character may be split at buffer end (Adiel Mittmann), 1514 440226 Add xmlXIncludeProcessTreeFlagsData API (Stefan Behnel), 1515 572129 speed up parsing of large HTML text nodes (Markus Kull), 1516 Fix HTML parsing with 0 character in CDATA (Daniel Veillard), 1517 Fix SetGenericErrorFunc and SetStructured clash (Wang Lam), 1518 566012 Incomplete EBCDIC parsing support (Martin Kogler), 1519 541335 HTML avoid creating 2 head or 2 body element (Daniel Veillard), 1520 541237 error correcting missing end tags in HTML (Daniel Veillard), 1521 583439 missing line numbers in push mode (Daniel Veillard), 1522 587867 xmllint --html --xmlout serializing as HTML (Daniel Veillard), 1523 559501 avoid select and use poll for nanohttp (Raphael Prevost), 1524 559410 - Regexp bug on (...)? constructs (Daniel Veillard), 1525 Fix a small problem on previous HTML parser patch (Daniel Veillard), 1526 592430 - HTML parser runs into endless loop (Daniel Veillard), 1527 447899 potential double free in xmlFreeTextReader (Daniel Veillard), 1528 446613 small validation bug mixed content with NS (Daniel Veillard), 1529 Fix the problem of revalidating a doc with RNG (Daniel Veillard), 1530 Fix xmlKeepBlanksDefault to not break indent (Nick Wellnhofer), 1531 512131 refs from externalRef part need to be added (Daniel Veillard), 1532 512131 crash in xmlRelaxNGValidateFullElement (Daniel Veillard), 1533 588441 allow '.' in HTML Names even if invalid (Daniel Veillard), 1534 582913 Fix htmlSetMetaEncoding() to be nicer (Daniel Veillard), 1535 579317 Try to find the HTML encoding information (Daniel Veillard), 1536 575875 don't output charset=html (Daniel Veillard), 1537 571271 fix semantic of xsd:all with minOccurs=0 (Daniel Veillard), 1538 570702 fix a bug in regexp determinism checking (Daniel Veillard), 1539 567619 xmlValidateNotationUse missing param test (Daniel Veillard), 1540 574393 utf-8 filename magic for compressed files (Hans Breuer), 1541 Fix a couple of problems in the parser (Daniel Veillard), 1542 585505 Document ids and refs populated by XSD (Wayne Jensen), 1543 582906 XSD validating multiple imports of the same schema (Jason Childs), 1544 Bug 582887 problems validating complex schemas (Jason Childs), 1545 Bug 579729 fix XSD schemas parsing crash (Miroslav Bajtos), 1546 576368 htmlChunkParser with special attributes (Jiri Netolicky), 1547 Bug 565747 relax anyURI data character checking (Vincent Lefevre), 1548 Preserve attributes of include start on tree copy (Petr Pajas), 1549 Skip silently unrecognized XPointer schemes (Jakub Wilk), 1550 Fix leak on SAX1, xmllint --sax1 option and debug (Daniel Veillard), 1551 potential NULL dereference on non-glibc (Jim Meyering), 1552 Fix an XSD validation crash (Daniel Veillard), 1553 Fix a regression in streaming entities support (Daniel Veillard), 1554 Fix a couple of ABI issues with C14N 1.1 (Aleksey Sanin), 1555 Aleksey Sanin support for c14n 1.1 (Aleksey Sanin), 1556 reader bug fix with entities (Daniel Veillard), 1557 use options from current parser ctxt for external entities (Rob Richards), 1558 581612 use %s to printf strings (Christian Persch), 1559 584605 change the threading initialization sequence (Igor Novoseltsev), 1560 580705 keep line numbers in HTML parser (Aaron Patterson), 1561 581803 broken HTML table attributes init (Roland Steiner), 1562 do not set error code in xmlNsWarn (Rob Richards), 1563 564217 fix structured error handling problems, 1564 reuse options from current parser for entities (Rob Richards), 1565 xmlXPathRegisterNs should not allow enpty prefixes (Daniel Veillard), 1566 add a missing check in xmlAddSibling (Kris Breuker), 1567 avoid leaks on errors (Jinmei Tatuya) 1568 </li> 1569 <li>Cleanup: 1570 Chasing dead assignments reported by clang-scan (Daniel Veillard), 1571 A few more safety cleanup raised by scan (Daniel Veillard), 1572 Fixing assorted potential problems raised by scan (Daniel Veillard), 1573 Potential uninitialized arguments raised by scan (Daniel Veillard), 1574 Fix a bunch of scan 'dead increments' and cleanup (Daniel Veillard), 1575 Remove a pedantic warning (Daniel Veillard), 1576 555833 always use rm -f in uninstall-local (Daniel Veillard), 1577 542394 xmlRegisterOutputCallbacks MAX_INPUT_CALLBACK (Daniel Veillard), 1578 Autoregenerate libxml2.syms automated checkings (Daniel Veillard), 1579 Make xmlRecoverDoc const (Martin Trappel) (Daniel Veillard), 1580 Both args of xmlStrcasestr are const (Daniel Veillard), 1581 hide the nbParse* variables used for debugging (Mike Hommey), 1582 570806 changed include of config.h (William M. Brack), 1583 cleanups and error reports when xmlTextWriterVSprintf fails (Jinmei Tatuya) 1584 </li> 1585 </ul> 1586 <h3>2.7.3: Jan 18 2009</h3> 1587 <ul> 1588 <li>Build fix: fix build when HTML support is not included.</li> 1589 <li>Bug fixes: avoid memory overflow in gigantic text nodes, 1590 indentation problem on the writed (Rob Richards), 1591 xmlAddChildList pointer problem (Rob Richards and Kevin Milburn), 1592 xmlAddChild problem with attribute (Rob Richards and Kris Breuker), 1593 avoid a memory leak in an edge case (Daniel Zimmermann), 1594 deallocate some pthread data (Alex Ott).</li> 1595 <li>Improvements: configure option to avoid rebuilding docs (Adrian Bunk), 1596 limit text nodes to 10MB max by default, add element traversal 1597 APIs, add a parser option to enable pre 2.7 SAX behavior (Rob Richards), 1598 add gcc malloc checking (Marcus Meissner), add gcc printf like functions 1599 parameters checking (Marcus Meissner).</li> 1600 </ul> 1601 <h3>2.7.2: Oct 3 2008</h3> 1602 <ul> 1603 <li>Portability fix: fix solaris compilation problem, fix compilation 1604 if XPath is not configured in</li> 1605 <li>Bug fixes: nasty entity bug introduced in 2.7.0, restore old behaviour 1606 when saving an HTML doc with an xml dump function, HTML UTF-8 parsing 1607 bug, fix reader custom error handlers (Riccardo Scussat) 1608 <li>Improvement: xmlSave options for more flexibility to save as 1609 XML/HTML/XHTML, handle leading BOM in HTML documents</li> 1610 </ul> 1611 1612 <h3>2.7.1: Sep 1 2008</h3> 1613 <ul> 1614 <li>Portability fix: Borland C fix (Moritz Both)</li> 1615 <li>Bug fixes: python serialization wrappers, XPath QName corner 1616 case handking and leaks (Martin)</li> 1617 <li>Improvement: extend the xmlSave to handle HTML documents and trees</li> 1618 <li>Cleanup: python serialization wrappers</li> 1619 </ul> 1620 1621 <h3>2.7.0: Aug 30 2008</h3> 1622 <ul> 1623 <li>Documentation: switch ChangeLog to UTF-8, improve mutithreads and 1624 xmlParserCleanup docs</li> 1625 <li>Portability fixes: Older Win32 platforms (Rob Richards), MSVC 1626 porting fix (Rob Richards), Mac OS X regression tests (Sven Herzberg), 1627 non GNUCC builds (Rob Richards), compilation on Haiku (Andreas Frber) 1628 </li> 1629 <li>Bug fixes: various realloc problems (Ashwin), potential double-free 1630 (Ashwin), regexp crash, icrash with invalid whitespace facets (Rob 1631 Richards), pattern fix when streaming (William Brack), various XML 1632 parsing and validation fixes based on the W3C regression tests, reader 1633 tree skipping function fix (Ashwin), Schemas regexps escaping fix 1634 (Volker Grabsch), handling of entity push errors (Ashwin), fix a slowdown 1635 when encoder cant serialize characters on output</li> 1636 <li>Code cleanup: compilation fix without the reader, without the output 1637 (Robert Schwebel), python whitespace (Martin), many space/tabs cleanups, 1638 serious cleanup of the entity handling code</li> 1639 <li>Improvement: switch parser to XML-1.0 5th edition, add parsing flags 1640 for old versions, switch URI parsing to RFC 3986, 1641 add xmlSchemaValidCtxtGetParserCtxt (Holger Kaelberer), 1642 new hashing functions for dictionnaries (based on Stefan Behnel work), 1643 improve handling of misplaced html/head/body in HTML parser, better 1644 regression test tools and code coverage display, better algorithms 1645 to detect various versions of the billion laughts attacks, make 1646 arbitrary parser limits avoidable as a parser option</li> 1647 </ul> 1648 <h3>2.6.32: Apr 8 2008</h3> 1649 <ul> 1650 <li>Documentation: returning heap memory to kernel (Wolfram Sang), 1651 trying to clarify xmlCleanupParser() use, xmlXPathContext improvement 1652 (Jack Jansen), improve the *Recover* functions documentation, 1653 XmlNodeType doc link fix (Martijn Arts)</li> 1654 <li>Bug fixes: internal subset memory leak (Ashwin), avoid problem with 1655 paths starting with // (Petr Sumbera), streaming XSD validation callback 1656 patches (Ashwin), fix redirection on port other than 80 (William Brack), 1657 SAX2 leak (Ashwin), XInclude fragment of own document (Chris Ryan), 1658 regexp bug with '.' (Andrew Tosh), flush the writer at the end of the 1659 document (Alfred Mickautsch), output I/O bug fix (William Brack), 1660 writer CDATA output after a text node (Alex Khesin), UTF-16 encoding 1661 detection (William Brack), fix handling of empty CDATA nodes for Safari 1662 team, python binding problem with namespace nodes, improve HTML parsing 1663 (Arnold Hendriks), regexp automata build bug, memory leak fix (Vasily 1664 Chekalkin), XSD test crash, weird system parameter entity parsing problem, 1665 allow save to file:///X:/ windows paths, various attribute normalisation 1666 problems, externalSubsetSplit fix (Ashwin), attribute redefinition in 1667 the DTD (Ashwin), fix in char ref parsing check (Alex Khesin), many 1668 out of memory handling fixes (Ashwin), XPath out of memory handling fixes 1669 (Alvaro Herrera), various realloc problems (Ashwin), UCS4 encoding 1670 conversion buffer size (Christian Fruth), problems with EatName 1671 functions on memory errors, BOM handling in external parsed entities 1672 (Mark Rowe)</li> 1673 <li>Code cleanup: fix build under VS 2008 (David Wimsey), remove useless 1674 mutex in xmlDict (Florent Guilian), Mingw32 compilation fix (Carlo 1675 Bramini), Win and MacOS EOL cleanups (Florent Guiliani), iconv need 1676 a const detection (Roumen Petrov), simplify xmlSetProp (Julien Charbon), 1677 cross compilation fixes for Mingw (Roumen Petrov), SCO Openserver build 1678 fix (Florent Guiliani), iconv uses const on Win32 (Rob Richards), 1679 duplicate code removal (Ashwin), missing malloc test and error reports 1680 (Ashwin), VMS makefile fix (Tycho Hilhorst)</li> 1681 <li>improvements: better plug of schematron in the normal error handling 1682 (Tobias Minich)</li> 1683 </ul> 1684 1685 <h3>2.6.31: Jan 11 2008</h3> 1686 <ul> 1687 <li>Security fix: missing of checks in UTF-8 parsing</li> 1688 <li>Bug fixes: regexp bug, dump attribute from XHTML document, fix 1689 xmlFree(NULL) to not crash in debug mode, Schematron parsing crash 1690 (Rob Richards), global lock free on Windows (Marc-Antoine Ruel), 1691 XSD crash due to double free (Rob Richards), indentation fix in 1692 xmlTextWriterFullEndElement (Felipe Pena), error in attribute type 1693 parsing if attribute redeclared, avoid crash in hash list scanner if 1694 deleting elements, column counter bug fix (Christian Schmidt), 1695 HTML embed element saving fix (Stefan Behnel), avoid -L/usr/lib 1696 output from xml2-config (Fred Crozat), avoid an xmllint crash 1697 (Stefan Kost), don't stop HTML parsing on out of range chars. 1698 </li> 1699 <li>Code cleanup: fix open() call third argument, regexp cut'n paste 1700 copy error, unused variable in __xmlGlobalInitMutexLock (Hannes Eder), 1701 some make distcheck realted fixes (John Carr)</li> 1702 <li>Improvements: HTTP Header: includes port number (William Brack), 1703 testURI --debug option, </li> 1704 </ul> 1705 <h3>2.6.30: Aug 23 2007</h3> 1706 <ul> 1707 <li>Portability: Solaris crash on error handling, windows path fixes 1708 (Roland Schwarz and Rob Richards), mingw build (Roland Schwarz)</li> 1709 <li>Bugfixes: xmlXPathNodeSetSort problem (William Brack), leak when 1710 reusing a writer for a new document (Dodji Seketeli), Schemas 1711 xsi:nil handling patch (Frank Gross), relative URI build problem 1712 (Patrik Fimml), crash in xmlDocFormatDump, invalid char in comment 1713 detection bug, fix disparity with xmlSAXUserParseMemory, automata 1714 generation for complex regexp counts problems, Schemas IDC import 1715 problems (Frank Gross), xpath predicate evailation error handling 1716 (William Brack)</li> 1717 </ul> 1718 <h3>2.6.29: Jun 12 2007</h3> 1719 <ul> 1720 <li>Portability: patches from Andreas Stricke for WinCEi, 1721 fix compilation warnings (William Brack), avoid warnings on Apple OS/X 1722 (Wendy Doyle and Mark Rowe), Windows compilation and threading 1723 improvements (Rob Richards), compilation against old Python versions, 1724 new GNU tar changes (Ryan Hill)</li> 1725 <li>Documentation: xmlURIUnescapeString comment, </li> 1726 <li>Bugfixes: xmlBufferAdd problem (Richard Jones), 'make valgrind' 1727 flag fix (Richard Jones), regexp interpretation of \, 1728 htmlCreateDocParserCtxt (Jean-Daniel Dupas), configure.in 1729 typo (Bjorn Reese), entity content failure, xmlListAppend() fix 1730 (Georges-Andr Silber), XPath number serialization (William Brack), 1731 nanohttp gzipped stream fix (William Brack and Alex Cornejo), 1732 xmlCharEncFirstLine typo (Mark Rowe), uri bug (Franois Delyon), 1733 XPath string value of PI nodes (William Brack), XPath node set 1734 sorting bugs (William Brack), avoid outputting namespace decl 1735 dups in the writer (Rob Richards), xmlCtxtReset bug, UTF-8 encoding 1736 error handling, recustion on next in catalogs, fix a Relax-NG crash, 1737 workaround wrong file: URIs, htmlNodeDumpFormatOutput on attributes, 1738 invalid character in attribute detection bug, big comments before 1739 internal subset streaming bug, HTML parsing of attributes with : in 1740 the name, IDness of name in HTML (Dagfinn I. Mannsker) </li> 1741 <li>Improvement: keep URI query parts in raw form (Richard Jones), 1742 embed tag support in HTML (Michael Day) </li> 1743 </ul> 1744 1745 <h3>2.6.28: Apr 17 2007</h3> 1746 <ul> 1747 <li>Documentation: comment fixes (Markus Keim), xpath comments fixes too 1748 (James Dennett)</li> 1749 <li>Bug fixes: XPath bug (William Brack), HTML parser autoclose stack usage 1750 (Usamah Malik), various regexp bug fixes (DV and William), path conversion 1751 on Windows (Igor Zlatkovic), htmlCtxtReset fix (Michael Day), XPath 1752 principal node of axis bug, HTML serialization of some codepoint 1753 (Steven Rainwater), user data propagation in XInclude (Michael Day), 1754 standalone and XML decl detection (Michael Day), Python id ouptut 1755 for some id, fix the big python string memory leak, URI parsing fixes 1756 (Stphane Bidoul and William), long comments parsing bug (William), 1757 concurrent threads initialization (Ted Phelps), invalid char 1758 in text XInclude (William), XPath memory leak (William), tab in 1759 python problems (Andreas Hanke), XPath node comparison error 1760 (Oleg Paraschenko), cleanup patch for reader (Julien Reichel), 1761 XML Schemas attribute group (William), HTML parsing problem (William), 1762 fix char 0x2d in regexps (William), regexp quantifier range with 1763 min occurs of 0 (William), HTML script/style parsing (Mike Day)</li> 1764 <li>Improvement: make xmlTextReaderSetup() public</li> 1765 <li>Compilation and postability: fix a missing include problem (William), 1766 __ss_familly on AIX again (Bjrn Wiberg), compilation without zlib 1767 (Michael Day), catalog patch for Win32 (Christian Ehrlicher), 1768 Windows CE fixes (Andreas Stricke)</li> 1769 <li>Various CVS to SVN infrastructure changes</li> 1770 </ul> 1771 <h3>2.6.27: Oct 25 2006</h3> 1772 <ul> 1773 <li>Portability fixes: file names on windows (Roland Schwingel, 1774 Emelyanov Alexey), windows compile fixup (Rob Richards), 1775 AIX iconv() is apparently case sensitive</li> 1776 <li>improvements: Python XPath types mapping (Nic Ferrier), XPath optimization 1777 (Kasimier), add xmlXPathCompiledEvalToBoolean (Kasimier), Python node 1778 equality and comparison (Andreas Pakulat), xmlXPathCollectAndTest 1779 improvememt (Kasimier), expose if library was compiled with zlib 1780 support (Andrew Nosenko), cache for xmlSchemaIDCMatcher structs 1781 (Kasimier), xmlTextConcat should work with comments and PIs (Rob 1782 Richards), export htmlNewParserCtxt needed by Michael Day, refactoring 1783 of catalog entity loaders (Michael Day), add XPointer support to 1784 python bindings (Ross Reedstrom, Brian West and Stefan Anca), 1785 try to sort out most file path to URI conversions and xmlPathToUri, 1786 add --html --memory case to xmllint</li> 1787 <li>building fix: fix --with-minimum (Felipe Contreras), VMS fix, 1788 const'ification of HTML parser structures (Matthias Clasen), 1789 portability fix (Emelyanov Alexey), wget autodetection (Peter 1790 Breitenlohner), remove the build path recorded in the python 1791 shared module, separate library flags for shared and static builds 1792 (Mikhail Zabaluev), fix --with-minimum --with-sax1 builds, fix 1793 --with-minimum --with-schemas builds</li> 1794 <li>bug fix: xmlGetNodePath fix (Kasimier), xmlDOMWrapAdoptNode and 1795 attribute (Kasimier), crash when using the recover mode, 1796 xmlXPathEvalExpr problem (Kasimier), xmlXPathCompExprAdd bug (Kasimier), 1797 missing destry in xmlFreeRMutex (Andrew Nosenko), XML Schemas fixes 1798 (Kasimier), warning on entities processing, XHTML script and style 1799 serialization (Kasimier), python generator for long types, bug in 1800 xmlSchemaClearValidCtxt (Bertrand Fritsch), xmlSchemaXPathEvaluate 1801 allocation bug (Marton Illes), error message end of line (Rob Richards), 1802 fix attribute serialization in writer (Rob Richards), PHP4 DTD validation 1803 crasher, parser safety patch (Ben Darnell), _private context propagation 1804 when parsing entities (with Michael Day), fix entities behaviour when 1805 using SAX, URI to file path fix (Mikhail Zabaluev), disapearing validity 1806 context, arg error in SAX callback (Mike Hommey), fix mixed-content 1807 autodetect when using --noblanks, fix xmlIOParseDTD error handling, 1808 fix bug in xmlSplitQName on special Names, fix Relax-NG element content 1809 validation bug, fix xmlReconciliateNs bug, fix potential attribute 1810 XML parsing bug, fix line/column accounting in XML parser, chunking bug 1811 in the HTML parser on script, try to detect obviously buggy HTML 1812 meta encoding indications, bugs with encoding BOM and xmlSaveDoc, 1813 HTML entities in attributes parsing, HTML minimized attribute values, 1814 htmlReadDoc and htmlReadIO were broken, error handling bug in 1815 xmlXPathEvalExpression (Olaf Walkowiak), fix a problem in 1816 htmlCtxtUseOptions, xmlNewInputFromFile could leak (Marius Konitzer), 1817 bug on misformed SSD regexps (Christopher Boumenot) 1818 </li> 1819 <li>documentation: warning about XML_PARSE_COMPACT (Kasimier Buchcik), 1820 fix xmlXPathCastToString documentation, improve man pages for 1821 xmllitn and xmlcatalog (Daniel Leidert), fixed comments of a few 1822 functions</li> 1823 </ul> 1824 <h3>2.6.26: Jun 6 2006</h3> 1825 <ul> 1826 <li>portability fixes: Python detection (Joseph Sacco), compilation 1827 error(William Brack and Graham Bennett), LynxOS patch (Olli Savia)</li> 1828 <li>bug fixes: encoding buffer problem, mix of code and data in 1829 xmlIO.c(Kjartan Maraas), entities in XSD validation (Kasimier Buchcik), 1830 variousXSD validation fixes (Kasimier), memory leak in pattern (Rob 1831 Richards andKasimier), attribute with colon in name (Rob Richards), XPath 1832 leak inerror reporting (Aleksey Sanin), XInclude text include of 1833 selfdocument.</li> 1834 <li>improvements: Xpath optimizations (Kasimier), XPath object 1835 cache(Kasimier)</li> 1836 </ul> 1837 1838 <h3>2.6.25: Jun 6 2006:</h3> 1839 1840 <p>Do not use or package 2.6.25</p> 1841 1842 <h3>2.6.24: Apr 28 2006</h3> 1843 <ul> 1844 <li>Portability fixes: configure on Windows, testapi compile on windows 1845 (Kasimier Buchcik, venkat naidu), Borland C++ 6 compile (Eric Zurcher), 1846 HP-UX compiler workaround (Rick Jones), xml2-config bugfix, gcc-4.1 1847 cleanups, Python detection scheme (Joseph Sacco), UTF-8 file paths on 1848 Windows (Roland Schwingel). 1849 </li> 1850 <li>Improvements: xmlDOMWrapReconcileNamespaces xmlDOMWrapCloneNode (Kasimier 1851 Buchcik), XML catalog debugging (Rick Jones), update to Unicode 4.01.</li> 1852 <li>Bug fixes: xmlParseChunk() problem in 2.6.23, xmlParseInNodeContext() 1853 on HTML docs, URI behaviour on Windows (Rob Richards), comment streaming 1854 bug, xmlParseComment (with William Brack), regexp bug fixes (DV & 1855 Youri Golovanov), xmlGetNodePath on text/CDATA (Kasimier), 1856 one Relax-NG interleave bug, xmllint --path and --valid, 1857 XSD bugfixes (Kasimier), remove debug 1858 left in Python bindings (Nic Ferrier), xmlCatalogAdd bug (Martin Cole), 1859 xmlSetProp fixes (Rob Richards), HTML IDness (Rob Richards), a large 1860 number of cleanups and small fixes based on Coverity reports, bug 1861 in character ranges, Unicode tables const (Aivars Kalvans), schemas 1862 fix (Stefan Kost), xmlRelaxNGParse error deallocation, 1863 xmlSchemaAddSchemaDoc error deallocation, error handling on unallowed 1864 code point, ixmllint --nonet to never reach the net (Gary Coady), 1865 line break in writer after end PI (Jason Viers). </li> 1866 <li>Documentation: man pages updates and cleanups (Daniel Leidert).</li> 1867 <li>New features: Relax NG structure error handlers.</li> 1868 </ul> 1869 1870 <h3>2.6.23: Jan 5 2006</h3> 1871 <ul> 1872 <li>portability fixes: Windows (Rob Richards), getaddrinfo on Windows 1873 (Kolja Nowak, Rob Richards), icc warnings (Kjartan Maraas), 1874 --with-minimum compilation fixes (William Brack), error case handling fix 1875 on Solaris (Albert Chin), don't use 'list' as parameter name reported by 1876 Samuel Diaz Garcia, more old Unices portability fixes (Albert Chin), 1877 MinGW compilation (Mark Junker), HP-UX compiler warnings (Rick 1878 Jones),</li> 1879 <li>code cleanup: xmlReportError (Adrian Mouat), remove xmlBufferClose 1880 (Geert Jansen), unreachable code (Oleksandr Kononenko), refactoring 1881 parsing code (Bjorn Reese)</li> 1882 <li>bug fixes: xmlBuildRelativeURI and empty path (William Brack), 1883 combinatory explosion and performances in regexp code, leak in 1884 xmlTextReaderReadString(), xmlStringLenDecodeEntities problem (Massimo 1885 Morara), Identity Constraints bugs and a segfault (Kasimier Buchcik), 1886 XPath pattern based evaluation bugs (DV & Kasimier), 1887 xmlSchemaContentModelDump() memory leak (Kasimier), potential leak in 1888 xmlSchemaCheckCSelectorXPath(), xmlTextWriterVSprintf() misuse of 1889 vsnprintf (William Brack), XHTML serialization fix (Rob Richards), CRLF 1890 split problem (William), issues with non-namespaced attributes in 1891 xmlAddChild() xmlAddNextSibling() and xmlAddPrevSibling() (Rob Richards), 1892 HTML parsing of script, Python must not output to stdout (Nic Ferrier), 1893 exclusive C14N namespace visibility (Aleksey Sanin), XSD dataype 1894 totalDigits bug (Kasimier Buchcik), error handling when writing to an 1895 xmlBuffer (Rob Richards), runtest schemas error not reported (Hisashi 1896 Fujinaka), signed/unsigned problem in date/time code (Albert Chin), fix 1897 XSI driven XSD validation (Kasimier), parsing of xs:decimal (Kasimier), 1898 fix DTD writer output (Rob Richards), leak in xmlTextReaderReadInnerXml 1899 (Gary Coady), regexp bug affecting schemas (Kasimier), configuration of 1900 runtime debugging (Kasimier), xmlNodeBufGetContent bug on entity refs 1901 (Oleksandr Kononenko), xmlRegExecPushString2 bug (Sreeni Nair), 1902 compilation and build fixes (Michael Day), removed dependancies on 1903 xmlSchemaValidError (Kasimier), bug with <xml:foo/>, more XPath 1904 pattern based evaluation fixes (Kasimier)</li> 1905 <li>improvements: XSD Schemas redefinitions/restrictions (Kasimier 1906 Buchcik), node copy checks and fix for attribute (Rob Richards), counted 1907 transition bug in regexps, ctxt->standalone = -2 to indicate no 1908 standalone attribute was found, add xmlSchemaSetParserStructuredErrors() 1909 (Kasimier Buchcik), add xmlTextReaderSchemaValidateCtxt() to API 1910 (Kasimier), handle gzipped HTTP resources (Gary Coady), add 1911 htmlDocDumpMemoryFormat. (Rob Richards),</li> 1912 <li>documentation: typo (Michael Day), libxml man page (Albert Chin), save 1913 function to XML buffer (Geert Jansen), small doc fix (Aron Stansvik),</li> 1914 </ul> 1915 1916 <h3>2.6.22: Sep 12 2005</h3> 1917 <ul> 1918 <li>build fixes: compile without schematron (Stphane Bidoul)</li> 1919 <li>bug fixes: xmlDebugDumpNode on namespace node (Oleg Paraschenko)i, 1920 CDATA push parser bug, xmlElemDump problem with XHTML1 doc, 1921 XML_FEATURE_xxx clash with expat headers renamed XML_WITH_xxx, fix some 1922 output formatting for meta element (Rob Richards), script and style 1923 XHTML1 serialization (David Madore), Attribute derivation fixups in XSD 1924 (Kasimier Buchcik), better IDC error reports (Kasimier Buchcik)</li> 1925 <li>improvements: add XML_SAVE_NO_EMPTY xmlSaveOption (Rob Richards), add 1926 XML_SAVE_NO_XHTML xmlSaveOption, XML Schemas improvements preparing for 1927 derive (Kasimier Buchcik).</li> 1928 <li>documentation: generation of gtk-doc like docs, integration with 1929 devhelp.</li> 1930 </ul> 1931 1932 <h3>2.6.21: Sep 4 2005</h3> 1933 <ul> 1934 <li>build fixes: Cygwin portability fixes (Gerrit P. Haase), calling 1935 convention problems on Windows (Marcus Boerger), cleanups based on Linus' 1936 sparse tool, update of win32/configure.js (Rob Richards), remove warnings 1937 on Windows(Marcus Boerger), compilation without SAX1, detection of the 1938 Python binary, use $GCC inestad of $CC = 'gcc' (Andrew W. Nosenko), 1939 compilation/link with threads and old gcc, compile problem by C370 on 1940 Z/OS,</li> 1941 <li>bug fixes: http_proxy environments (Peter Breitenlohner), HTML UTF-8 1942 bug (Jiri Netolicky), XPath NaN compare bug (William Brack), 1943 htmlParseScript potential bug, Schemas regexp handling of spaces, Base64 1944 Schemas comparisons NIST passes, automata build error xsd:all, 1945 xmlGetNodePath for namespaced attributes (Alexander Pohoyda), xmlSchemas 1946 foreign namespaces handling, XML Schemas facet comparison (Kupriyanov 1947 Anatolij), xmlSchemaPSimpleTypeErr error report (Kasimier Buchcik), xml: 1948 namespace ahndling in Schemas (Kasimier), empty model group in Schemas 1949 (Kasimier), wilcard in Schemas (Kasimier), URI composition (William), 1950 xs:anyType in Schemas (Kasimier), Python resolver emmitting error 1951 messages directly, Python xmlAttr.parent (Jakub Piotr Clapa), trying to 1952 fix the file path/URI conversion, xmlTextReaderGetAttribute fix (Rob 1953 Richards), xmlSchemaFreeAnnot memleak (Kasimier), HTML UTF-8 1954 serialization, streaming XPath, Schemas determinism detection problem, 1955 XInclude bug, Schemas context type (Dean Hill), validation fix (Derek 1956 Poon), xmlTextReaderGetAttribute[Ns] namespaces (Rob Richards), Schemas 1957 type fix (Kuba Nowakowski), UTF-8 parser bug, error in encoding handling, 1958 xmlGetLineNo fixes, bug on entities handling, entity name extraction in 1959 error handling with XInclude, text nodes in HTML body tags (Gary Coady), 1960 xml:id and IDness at the treee level fixes, XPath streaming patterns 1961 bugs.</li> 1962 <li>improvements: structured interfaces for schemas and RNG error reports 1963 (Marcus Boerger), optimization of the char data inner loop parsing 1964 (thanks to Behdad Esfahbod for the idea), schematron validation though 1965 not finished yet, xmlSaveOption to omit XML declaration, keyref match 1966 error reports (Kasimier), formal expression handling code not plugged 1967 yet, more lax mode for the HTML parser, parser XML_PARSE_COMPACT option 1968 for text nodes allocation.</li> 1969 <li>documentation: xmllint man page had --nonet duplicated</li> 1970 </ul> 1971 1972 <h3>2.6.20: Jul 10 2005</h3> 1973 <ul> 1974 <li>build fixes: Windows build (Rob Richards), Mingw compilation (Igor 1975 Zlatkovic), Windows Makefile (Igor), gcc warnings (Kasimier and 1976 andriy (a] google.com), use gcc weak references to pthread to avoid the 1977 pthread dependancy on Linux, compilation problem (Steve Nairn), compiling 1978 of subset (Morten Welinder), IPv6/ss_family compilation (William Brack), 1979 compilation when disabling parts of the library, standalone test 1980 distribution.</li> 1981 <li>bug fixes: bug in lang(), memory cleanup on errors (William Brack), 1982 HTTP query strings (Aron Stansvik), memory leak in DTD (William), integer 1983 overflow in XPath (William), nanoftp buffer size, pattern "." apth fixup 1984 (Kasimier), leak in tree reported by Malcolm Rowe, replaceNode patch 1985 (Brent Hendricks), CDATA with NULL content (Mark Vakoc), xml:base fixup 1986 on XInclude (William), pattern fixes (William), attribute bug in 1987 exclusive c14n (Aleksey Sanin), xml:space and xml:lang with SAX2 (Rob 1988 Richards), namespace trouble in complex parsing (Malcolm Rowe), XSD type 1989 QNames fixes (Kasimier), XPath streaming fixups (William), RelaxNG bug 1990 (Rob Richards), Schemas for Schemas fixes (Kasimier), removal of ID (Rob 1991 Richards), a small RelaxNG leak, HTML parsing in push mode bug (James 1992 Bursa), failure to detect UTF-8 parsing bugs in CDATA sections, 1993 areBlanks() heuristic failure, duplicate attributes in DTD bug 1994 (William).</li> 1995 <li>improvements: lot of work on Schemas by Kasimier Buchcik both on 1996 conformance and streaming, Schemas validation messages (Kasimier Buchcik, 1997 Matthew Burgess), namespace removal at the python level (Brent 1998 Hendricks), Update to new Schemas regression tests from W3C/Nist 1999 (Kasimier), xmlSchemaValidateFile() (Kasimier), implementation of 2000 xmlTextReaderReadInnerXml and xmlTextReaderReadOuterXml (James Wert), 2001 standalone test framework and programs, new DOM import APIs 2002 xmlDOMWrapReconcileNamespaces() xmlDOMWrapAdoptNode() and 2003 xmlDOMWrapRemoveNode(), extension of xmllint capabilities for SAX and 2004 Schemas regression tests, xmlStopParser() available in pull mode too, 2005 ienhancement to xmllint --shell namespaces support, Windows port of the 2006 standalone testing tools (Kasimier and William), 2007 xmlSchemaValidateStream() xmlSchemaSAXPlug() and xmlSchemaSAXUnplug() SAX 2008 Schemas APIs, Schemas xmlReader support.</li> 2009 </ul> 2010 2011 <h3>2.6.19: Apr 02 2005</h3> 2012 <ul> 2013 <li>build fixes: drop .la from RPMs, --with-minimum build fix (William 2014 Brack), use XML_SOCKLEN_T instead of SOCKLEN_T because it breaks with AIX 2015 5.3 compiler, fixed elfgcchack.h generation and PLT reduction code on 2016 Linux/ELF/gcc4</li> 2017 <li>bug fixes: schemas type decimal fixups (William Brack), xmmlint return 2018 code (Gerry Murphy), small schemas fixes (Matthew Burgess and GUY 2019 Fabrice), workaround "DAV:" namespace brokeness in c14n (Aleksey Sanin), 2020 segfault in Schemas (Kasimier Buchcik), Schemas attribute validation 2021 (Kasimier), Prop related functions and xmlNewNodeEatName (Rob Richards), 2022 HTML serialization of name attribute on a elements, Python error handlers 2023 leaks and improvement (Brent Hendricks), uninitialized variable in 2024 encoding code, Relax-NG validation bug, potential crash if 2025 gnorableWhitespace is NULL, xmlSAXParseDoc and xmlParseDoc signatures, 2026 switched back to assuming UTF-8 in case no encoding is given at 2027 serialization time</li> 2028 <li>improvements: lot of work on Schemas by Kasimier Buchcik on facets 2029 checking and also mixed handling.</li> 2030 <li></li> 2031 </ul> 2032 2033 <h3>2.6.18: Mar 13 2005</h3> 2034 <ul> 2035 <li>build fixes: warnings (Peter Breitenlohner), testapi.c generation, 2036 Bakefile support (Francesco Montorsi), Windows compilation (Joel Reed), 2037 some gcc4 fixes, HP-UX portability fixes (Rick Jones).</li> 2038 <li>bug fixes: xmlSchemaElementDump namespace (Kasimier Buchcik), push and 2039 xmlreader stopping on non-fatal errors, thread support for dictionnaries 2040 reference counting (Gary Coady), internal subset and push problem, URL 2041 saved in xmlCopyDoc, various schemas bug fixes (Kasimier), Python paths 2042 fixup (Stephane Bidoul), xmlGetNodePath and namespaces, xmlSetNsProp fix 2043 (Mike Hommey), warning should not count as error (William Brack), 2044 xmlCreatePushParser empty chunk, XInclude parser flags (William), cleanup 2045 FTP and HTTP code to reuse the uri parsing and IPv6 (William), 2046 xmlTextWriterStartAttributeNS fix (Rob Richards), XMLLINT_INDENT being 2047 empty (William), xmlWriter bugs (Rob Richards), multithreading on Windows 2048 (Rich Salz), xmlSearchNsByHref fix (Kasimier), Python binding leak (Brent 2049 Hendricks), aliasing bug exposed by gcc4 on s390, xmlTextReaderNext bug 2050 (Rob Richards), Schemas decimal type fixes (William Brack), 2051 xmlByteConsumed static buffer (Ben Maurer).</li> 2052 <li>improvement: speedup parsing comments and DTDs, dictionnary support for 2053 hash tables, Schemas Identity constraints (Kasimier), streaming XPath 2054 subset, xmlTextReaderReadString added (Bjorn Reese), Schemas canonical 2055 values handling (Kasimier), add xmlTextReaderByteConsumed (Aron 2056 Stansvik),</li> 2057 <li>Documentation: Wiki support (Joel Reed)</li> 2058 </ul> 2059 2060 <h3>2.6.17: Jan 16 2005</h3> 2061 <ul> 2062 <li>build fixes: Windows, warnings removal (William Brack), 2063 maintainer-clean dependency(William), build in a different directory 2064 (William), fixing --with-minimum configure build (William), BeOS build 2065 (Marcin Konicki), Python-2.4 detection (William), compilation on AIX (Dan 2066 McNichol)</li> 2067 <li>bug fixes: xmlTextReaderHasAttributes (Rob Richards), xmlCtxtReadFile() 2068 to use the catalog(s), loop on output (William Brack), XPath memory leak, 2069 ID deallocation problem (Steve Shepard), debugDumpNode crash (William), 2070 warning not using error callback (William), xmlStopParser bug (William), 2071 UTF-16 with BOM on DTDs (William), namespace bug on empty elements in 2072 push mode (Rob Richards), line and col computations fixups (Aleksey 2073 Sanin), xmlURIEscape fix (William), xmlXPathErr on bad range (William), 2074 patterns with too many steps, bug in RNG choice optimization, line number 2075 sometimes missing.</li> 2076 <li>improvements: XSD Schemas (Kasimier Buchcik), python generator 2077 (William), xmlUTF8Strpos speedup (William), unicode Python strings 2078 (William), XSD error reports (Kasimier Buchcik), Python __str__ call 2079 serialize().</li> 2080 <li>new APIs: added xmlDictExists(), GetLineNumber and GetColumnNumber for 2081 the xmlReader (Aleksey Sanin), Dynamic Shared Libraries APIs (mostly Joel 2082 Reed), error extraction API from regexps, new XMLSave option for format 2083 (Phil Shafer)</li> 2084 <li>documentation: site improvement (John Fleck), FAQ entries 2085 (William).</li> 2086 </ul> 2087 2088 <h3>2.6.16: Nov 10 2004</h3> 2089 <ul> 2090 <li>general hardening and bug fixing crossing all the API based on new 2091 automated regression testing</li> 2092 <li>build fix: IPv6 build and test on AIX (Dodji Seketeli)</li> 2093 <li>bug fixes: problem with XML::Libxml reported by Petr Pajas, encoding 2094 conversion functions return values, UTF-8 bug affecting XPath reported by 2095 Markus Bertheau, catalog problem with NULL entries (William Brack)</li> 2096 <li>documentation: fix to xmllint man page, some API function descritpion 2097 were updated.</li> 2098 <li>improvements: DTD validation APIs provided at the Python level (Brent 2099 Hendricks)</li> 2100 </ul> 2101 2102 <h3>2.6.15: Oct 27 2004</h3> 2103 <ul> 2104 <li>security fixes on the nanoftp and nanohttp modules</li> 2105 <li>build fixes: xmllint detection bug in configure, building outside the 2106 source tree (Thomas Fitzsimmons)</li> 2107 <li>bug fixes: HTML parser on broken ASCII chars in names (William), Python 2108 paths (Malcolm Tredinnick), xmlHasNsProp and default namespace (William), 2109 saving to python file objects (Malcolm Tredinnick), DTD lookup fix 2110 (Malcolm), save back <group> in catalogs (William), tree build 2111 fixes (DV and Rob Richards), Schemas memory bug, structured error handler 2112 on Python 64bits, thread local memory deallocation, memory leak reported 2113 by Volker Roth, xmlValidateDtd in the presence of an internal subset, 2114 entities and _private problem (William), xmlBuildRelativeURI error 2115 (William).</li> 2116 <li>improvements: better XInclude error reports (William), tree debugging 2117 module and tests, convenience functions at the Reader API (Graham 2118 Bennett), add support for PI in the HTML parser.</li> 2119 </ul> 2120 2121 <h3>2.6.14: Sep 29 2004</h3> 2122 <ul> 2123 <li>build fixes: configure paths for xmllint and xsltproc, compilation 2124 without HTML parser, compilation warning cleanups (William Brack & 2125 Malcolm Tredinnick), VMS makefile update (Craig Berry),</li> 2126 <li>bug fixes: xmlGetUTF8Char (William Brack), QName properties (Kasimier 2127 Buchcik), XInclude testing, Notation serialization, UTF8ToISO8859x 2128 transcoding (Mark Itzcovitz), lots of XML Schemas cleanup and fixes 2129 (Kasimier), ChangeLog cleanup (Stepan Kasal), memory fixes (Mark Vakoc), 2130 handling of failed realloc(), out of bound array adressing in Schemas 2131 date handling, Python space/tabs cleanups (Malcolm Tredinnick), NMTOKENS 2132 E20 validation fix (Malcolm),</li> 2133 <li>improvements: added W3C XML Schemas testsuite (Kasimier Buchcik), add 2134 xmlSchemaValidateOneElement (Kasimier), Python exception hierearchy 2135 (Malcolm Tredinnick), Python libxml2 driver improvement (Malcolm 2136 Tredinnick), Schemas support for xsi:schemaLocation, 2137 xsi:noNamespaceSchemaLocation, xsi:type (Kasimier Buchcik)</li> 2138 </ul> 2139 2140 <h3>2.6.13: Aug 31 2004</h3> 2141 <ul> 2142 <li>build fixes: Windows and zlib (Igor Zlatkovic), -O flag with gcc, 2143 Solaris compiler warning, fixing RPM BuildRequires,</li> 2144 <li>fixes: DTD loading on Windows (Igor), Schemas error reports APIs 2145 (Kasimier Buchcik), Schemas validation crash, xmlCheckUTF8 (William Brack 2146 and Julius Mittenzwei), Schemas facet check (Kasimier), default namespace 2147 problem (William), Schemas hexbinary empty values, encoding error could 2148 genrate a serialization loop.</li> 2149 <li>Improvements: Schemas validity improvements (Kasimier), added --path 2150 and --load-trace options to xmllint</li> 2151 <li>documentation: tutorial update (John Fleck)</li> 2152 </ul> 2153 2154 <h3>2.6.12: Aug 22 2004</h3> 2155 <ul> 2156 <li>build fixes: fix --with-minimum, elfgcchack.h fixes (Peter 2157 Breitenlohner), perl path lookup (William), diff on Solaris (Albert 2158 Chin), some 64bits cleanups.</li> 2159 <li>Python: avoid a warning with 2.3 (William Brack), tab and space mixes 2160 (William), wrapper generator fixes (William), Cygwin support (Gerrit P. 2161 Haase), node wrapper fix (Marc-Antoine Parent), XML Schemas support 2162 (Torkel Lyng)</li> 2163 <li>Schemas: a lot of bug fixes and improvements from Kasimier Buchcik</li> 2164 <li>fixes: RVT fixes (William), XPath context resets bug (William), memory 2165 debug (Steve Hay), catalog white space handling (Peter Breitenlohner), 2166 xmlReader state after attribute reading (William), structured error 2167 handler (William), XInclude generated xml:base fixup (William), Windows 2168 memory reallocation problem (Steve Hay), Out of Memory conditions 2169 handling (William and Olivier Andrieu), htmlNewDoc() charset bug, 2170 htmlReadMemory init (William), a posteriori validation DTD base 2171 (William), notations serialization missing, xmlGetNodePath (Dodji), 2172 xmlCheckUTF8 (Diego Tartara), missing line numbers on entity 2173 (William)</li> 2174 <li>improvements: DocBook catalog build scrip (William), xmlcatalog tool 2175 (Albert Chin), xmllint --c14n option, no_proxy environment (Mike Hommey), 2176 xmlParseInNodeContext() addition, extend xmllint --shell, allow XInclude 2177 to not generate start/end nodes, extend xmllint --version to include CVS 2178 tag (William)</li> 2179 <li>documentation: web pages fixes, validity API docs fixes (William) 2180 schemas API fix (Eric Haszlakiewicz), xmllint man page (John Fleck)</li> 2181 </ul> 2182 2183 <h3>2.6.11: July 5 2004</h3> 2184 <ul> 2185 <li>Schemas: a lot of changes and improvements by Kasimier Buchcik for 2186 attributes, namespaces and simple types.</li> 2187 <li>build fixes: --with-minimum (William Brack), some gcc cleanup 2188 (William), --with-thread-alloc (William)</li> 2189 <li>portability: Windows binary package change (Igor Zlatkovic), Catalog 2190 path on Windows</li> 2191 <li>documentation: update to the tutorial (John Fleck), xmllint return code 2192 (John Fleck), man pages (Ville Skytta),</li> 2193 <li>bug fixes: C14N bug serializing namespaces (Aleksey Sanin), testSAX 2194 properly initialize the library (William), empty node set in XPath 2195 (William), xmlSchemas errors (William), invalid charref problem pointed 2196 by Morus Walter, XInclude xml:base generation (William), Relax-NG bug 2197 with div processing (William), XPointer and xml:base problem(William), 2198 Reader and entities, xmllint return code for schemas (William), reader 2199 streaming problem (Steve Ball), DTD serialization problem (William), 2200 libxml.m4 fixes (Mike Hommey), do not provide destructors as methods on 2201 Python classes, xmlReader buffer bug, Python bindings memory interfaces 2202 improvement (with Stphane Bidoul), Fixed the push parser to be back to 2203 synchronous behaviour.</li> 2204 <li>improvement: custom per-thread I/O enhancement (Rob Richards), register 2205 namespace in debug shell (Stefano Debenedetti), Python based regression 2206 test for non-Unix users (William), dynamically increase the number of 2207 XPath extension functions in Python and fix a memory leak (Marc-Antoine 2208 Parent and William)</li> 2209 <li>performance: hack done with Arjan van de Ven to reduce ELF footprint 2210 and generated code on Linux, plus use gcc runtime profiling to optimize 2211 the code generated in the RPM packages.</li> 2212 </ul> 2213 2214 <h3>2.6.10: May 17 2004</h3> 2215 <ul> 2216 <li>Web page generated for ChangeLog</li> 2217 <li>build fixes: --without-html problems, make check without make all</li> 2218 <li>portability: problem with xpath.c on Windows (MSC and Borland), memcmp 2219 vs. strncmp on Solaris, XPath tests on Windows (Mark Vakoc), C++ do not 2220 use "list" as parameter name, make tests work with Python 1.5 (Ed 2221 Davis),</li> 2222 <li>improvements: made xmlTextReaderMode public, small buffers resizing 2223 (Morten Welinder), add --maxmem option to xmllint, add 2224 xmlPopInputCallback() for Matt Sergeant, refactoring of serialization 2225 escaping, added escaping customization</li> 2226 <li>bugfixes: xsd:extension (Taihei Goi), assorted regexp bugs (William 2227 Brack), xmlReader end of stream problem, node deregistration with reader, 2228 URI escaping and filemanes, XHTML1 formatting (Nick Wellnhofer), regexp 2229 transition reduction (William), various XSD Schemas fixes (Kasimier 2230 Buchcik), XInclude fallback problem (William), weird problems with DTD 2231 (William), structured error handler callback context (William), reverse 2232 xmlEncodeSpecialChars() behaviour back to escaping '"'</li> 2233 </ul> 2234 2235 <h3>2.6.9: Apr 18 2004</h3> 2236 <ul> 2237 <li>implement xml:id Working Draft, relaxed XPath id() checking</li> 2238 <li>bugfixes: xmlCtxtReset (Brent Hendricks), line number and CDATA (Dave 2239 Beckett), Relax-NG compilation (William Brack), Regexp patches (with 2240 William), xmlUriEscape (Mark Vakoc), a Relax-NG notAllowed problem (with 2241 William), Relax-NG name classes compares (William), XInclude duplicate 2242 fallback (William), external DTD encoding detection (William), a DTD 2243 validation bug (William), xmlReader Close() fix, recusive extention 2244 schemas</li> 2245 <li>improvements: use xmlRead* APIs in test tools (Mark Vakoc), indenting 2246 save optimization, better handle IIS broken HTTP redirect behaviour (Ian 2247 Hummel), HTML parser frameset (James Bursa), libxml2-python RPM 2248 dependancy, XML Schemas union support (Kasimier Buchcik), warning removal 2249 clanup (William), keep ChangeLog compressed when installing from RPMs</li> 2250 <li>documentation: examples and xmlDocDumpMemory docs (John Fleck), new 2251 example (load, xpath, modify, save), xmlCatalogDump() comments,</li> 2252 <li>Windows: Borland C++ builder (Eric Zurcher), work around Microsoft 2253 compiler NaN handling bug (Mark Vakoc)</li> 2254 </ul> 2255 2256 <h3>2.6.8: Mar 23 2004</h3> 2257 <ul> 2258 <li>First step of the cleanup of the serialization code and APIs</li> 2259 <li>XML Schemas: mixed content (Adam Dickmeiss), QName handling fixes (Adam 2260 Dickmeiss), anyURI for "" (John Belmonte)</li> 2261 <li>Python: Canonicalization C14N support added (Anthony Carrico)</li> 2262 <li>xmlDocCopyNode() extension (William)</li> 2263 <li>Relax-NG: fix when processing XInclude results (William), external 2264 reference in interleave (William), missing error on <choice> 2265 failure (William), memory leak in schemas datatype facets.</li> 2266 <li>xmlWriter: patch for better DTD support (Alfred Mickautsch)</li> 2267 <li>bug fixes: xmlXPathLangFunction memory leak (Mike Hommey and William 2268 Brack), no ID errors if using HTML_PARSE_NOERROR, xmlcatalog fallbacks to 2269 URI on SYSTEM lookup failure, XInclude parse flags inheritance (William), 2270 XInclude and XPointer fixes for entities (William), XML parser bug 2271 reported by Holger Rauch, nanohttp fd leak (William), regexps char 2272 groups '-' handling (William), dictionnary reference counting problems, 2273 do not close stderr.</li> 2274 <li>performance patches from Petr Pajas</li> 2275 <li>Documentation fixes: XML_CATALOG_FILES in man pages (Mike Hommey)</li> 2276 <li>compilation and portability fixes: --without-valid, catalog cleanups 2277 (Peter Breitenlohner), MingW patch (Roland Schwingel), cross-compilation 2278 to Windows (Christophe de Vienne), --with-html-dir fixup (Julio Merino 2279 Vidal), Windows build (Eric Zurcher)</li> 2280 </ul> 2281 2282 <h3>2.6.7: Feb 23 2004</h3> 2283 <ul> 2284 <li>documentation: tutorial updates (John Fleck), benchmark results</li> 2285 <li>xmlWriter: updates and fixes (Alfred Mickautsch, Lucas Brasilino)</li> 2286 <li>XPath optimization (Petr Pajas)</li> 2287 <li>DTD ID handling optimization</li> 2288 <li>bugfixes: xpath number with > 19 fractional (William Brack), push 2289 mode with unescaped '>' characters, fix xmllint --stream --timing, fix 2290 xmllint --memory --stream memory usage, xmlAttrSerializeTxtContent 2291 handling NULL, trying to fix Relax-NG/Perl interface.</li> 2292 <li>python: 2.3 compatibility, whitespace fixes (Malcolm Tredinnick)</li> 2293 <li>Added relaxng option to xmllint --shell</li> 2294 </ul> 2295 2296 <h3>2.6.6: Feb 12 2004</h3> 2297 <ul> 2298 <li>nanohttp and nanoftp: buffer overflow error on URI parsing (Igor and 2299 William) reported by Yuuichi Teranishi</li> 2300 <li>bugfixes: make test and path issues, xmlWriter attribute serialization 2301 (William Brack), xmlWriter indentation (William), schemas validation 2302 (Eric Haszlakiewicz), XInclude dictionnaries issues (William and Oleg 2303 Paraschenko), XInclude empty fallback (William), HTML warnings (William), 2304 XPointer in XInclude (William), Python namespace serialization, 2305 isolat1ToUTF8 bound error (Alfred Mickautsch), output of parameter 2306 entities in internal subset (William), internal subset bug in push mode, 2307 <xs:all> fix (Alexey Sarytchev)</li> 2308 <li>Build: fix for automake-1.8 (Alexander Winston), warnings removal 2309 (Philip Ludlam), SOCKLEN_T detection fixes (Daniel Richard), fix 2310 --with-minimum configuration.</li> 2311 <li>XInclude: allow the 2001 namespace without warning.</li> 2312 <li>Documentation: missing example/index.html (John Fleck), version 2313 dependancies (John Fleck)</li> 2314 <li>reader API: structured error reporting (Steve Ball)</li> 2315 <li>Windows compilation: mingw, msys (Mikhail Grushinskiy), function 2316 prototype (Cameron Johnson), MSVC6 compiler warnings, _WINSOCKAPI_ 2317 patch</li> 2318 <li>Parsers: added xmlByteConsumed(ctxt) API to get the byte offest in 2319 input.</li> 2320 </ul> 2321 2322 <h3>2.6.5: Jan 25 2004</h3> 2323 <ul> 2324 <li>Bugfixes: dictionnaries for schemas (William Brack), regexp segfault 2325 (William), xs:all problem (William), a number of XPointer bugfixes 2326 (William), xmllint error go to stderr, DTD validation problem with 2327 namespace, memory leak (William), SAX1 cleanup and minimal options fixes 2328 (Mark Vadoc), parser context reset on error (Shaun McCance), XPath union 2329 evaluation problem (William) , xmlReallocLoc with NULL (Aleksey Sanin), 2330 XML Schemas double free (Steve Ball), XInclude with no href, argument 2331 callbacks order for XPath callbacks (Frederic Peters)</li> 2332 <li>Documentation: python scripts (William Brack), xslt stylesheets (John 2333 Fleck), doc (Sven Zimmerman), I/O example.</li> 2334 <li>Python bindings: fixes (William), enum support (Stphane Bidoul), 2335 structured error reporting (Stphane Bidoul)</li> 2336 <li>XInclude: various fixes for conformance, problem related to dictionnary 2337 references (William & me), recursion (William)</li> 2338 <li>xmlWriter: indentation (Lucas Brasilino), memory leaks (Alfred 2339 Mickautsch),</li> 2340 <li>xmlSchemas: normalizedString datatype (John Belmonte)</li> 2341 <li>code cleanup for strings functions (William)</li> 2342 <li>Windows: compiler patches (Mark Vakoc)</li> 2343 <li>Parser optimizations, a few new XPath and dictionnary APIs for future 2344 XSLT optimizations.</li> 2345 </ul> 2346 2347 <h3>2.6.4: Dec 24 2003</h3> 2348 <ul> 2349 <li>Windows build fixes (Igor Zlatkovic)</li> 2350 <li>Some serious XInclude problems reported by Oleg Paraschenko and</li> 2351 <li>Unix and Makefile packaging fixes (me, William Brack,</li> 2352 <li>Documentation improvements (John Fleck, William Brack), example fix 2353 (Lucas Brasilino)</li> 2354 <li>bugfixes: xmlTextReaderExpand() with xmlReaderWalker, XPath handling of 2355 NULL strings (William Brack) , API building reader or parser from 2356 filedescriptor should not close it, changed XPath sorting to be stable 2357 again (William Brack), xmlGetNodePath() generating '(null)' (William 2358 Brack), DTD validation and namespace bug (William Brack), XML Schemas 2359 double inclusion behaviour</li> 2360 </ul> 2361 2362 <h3>2.6.3: Dec 10 2003</h3> 2363 <ul> 2364 <li>documentation updates and cleanup (DV, William Brack, John Fleck)</li> 2365 <li>added a repository of examples, examples from Aleksey Sanin, Dodji 2366 Seketeli, Alfred Mickautsch</li> 2367 <li>Windows updates: Mark Vakoc, Igor Zlatkovic, Eric Zurcher, Mingw 2368 (Kenneth Haley)</li> 2369 <li>Unicode range checking (William Brack)</li> 2370 <li>code cleanup (William Brack)</li> 2371 <li>Python bindings: doc (John Fleck), bug fixes</li> 2372 <li>UTF-16 cleanup and BOM issues (William Brack)</li> 2373 <li>bug fixes: ID and xmlReader validation, XPath (William Brack), 2374 xmlWriter (Alfred Mickautsch), hash.h inclusion problem, HTML parser 2375 (James Bursa), attribute defaulting and validation, some serialization 2376 cleanups, XML_GET_LINE macro, memory debug when using threads (William 2377 Brack), serialization of attributes and entities content, xmlWriter 2378 (Daniel Schulman)</li> 2379 <li>XInclude bugfix, new APIs and update to the last version including the 2380 namespace change.</li> 2381 <li>XML Schemas improvements: include (Robert Stepanek), import and 2382 namespace handling, fixed the regression tests troubles, added examples 2383 based on Eric van der Vlist book, regexp fixes</li> 2384 <li>preliminary pattern support for streaming (needed for schemas 2385 constraints), added xmlTextReaderPreservePattern() to collect subdocument 2386 when streaming.</li> 2387 <li>various fixes in the structured error handling</li> 2388 </ul> 2389 2390 <h3>2.6.2: Nov 4 2003</h3> 2391 <ul> 2392 <li>XPath context unregistration fixes</li> 2393 <li>text node coalescing fixes (Mark Lilback)</li> 2394 <li>API to screate a W3C Schemas from an existing document (Steve Ball)</li> 2395 <li>BeOS patches (Marcin 'Shard' Konicki)</li> 2396 <li>xmlStrVPrintf function added (Aleksey Sanin)</li> 2397 <li>compilation fixes (Mark Vakoc)</li> 2398 <li>stdin parsing fix (William Brack)</li> 2399 <li>a posteriori DTD validation fixes</li> 2400 <li>xmlReader bug fixes: Walker fixes, python bindings</li> 2401 <li>fixed xmlStopParser() to really stop the parser and errors</li> 2402 <li>always generate line numbers when using the new xmlReadxxx 2403 functions</li> 2404 <li>added XInclude support to the xmlReader interface</li> 2405 <li>implemented XML_PARSE_NONET parser option</li> 2406 <li>DocBook XSLT processing bug fixed</li> 2407 <li>HTML serialization for <p> elements (William Brack and me)</li> 2408 <li>XPointer failure in XInclude are now handled as resource errors</li> 2409 <li>fixed xmllint --html to use the HTML serializer on output (added 2410 --xmlout to implement the previous behaviour of saving it using the XML 2411 serializer)</li> 2412 </ul> 2413 2414 <h3>2.6.1: Oct 28 2003</h3> 2415 <ul> 2416 <li>Mostly bugfixes after the big 2.6.0 changes</li> 2417 <li>Unix compilation patches: libxml.m4 (Patrick Welche), warnings cleanup 2418 (William Brack)</li> 2419 <li>Windows compilation patches (Joachim Bauch, Stephane Bidoul, Igor 2420 Zlatkovic)</li> 2421 <li>xmlWriter bugfix (Alfred Mickautsch)</li> 2422 <li>chvalid.[ch]: couple of fixes from Stephane Bidoul</li> 2423 <li>context reset: error state reset, push parser reset (Graham 2424 Bennett)</li> 2425 <li>context reuse: generate errors if file is not readable</li> 2426 <li>defaulted attributes for element coming from internal entities 2427 (Stephane Bidoul)</li> 2428 <li>Python: tab and spaces mix (William Brack)</li> 2429 <li>Error handler could crash in DTD validation in 2.6.0</li> 2430 <li>xmlReader: do not use the document or element _private field</li> 2431 <li>testSAX.c: avoid a problem with some PIs (Massimo Morara)</li> 2432 <li>general bug fixes: mandatory encoding in text decl, serializing 2433 Document Fragment nodes, xmlSearchNs 2.6.0 problem (Kasimier Buchcik), 2434 XPath errors not reported, slow HTML parsing of large documents.</li> 2435 </ul> 2436 2437 <h3>2.6.0: Oct 20 2003</h3> 2438 <ul> 2439 <li>Major revision release: should be API and ABI compatible but got a lot 2440 of change</li> 2441 <li>Increased the library modularity, far more options can be stripped out, 2442 a --with-minimum configuration will weight around 160KBytes</li> 2443 <li>Use per parser and per document dictionnary, allocate names and small 2444 text nodes from the dictionnary</li> 2445 <li>Switch to a SAX2 like parser rewrote most of the XML parser core, 2446 provides namespace resolution and defaulted attributes, minimize memory 2447 allocations and copies, namespace checking and specific error handling, 2448 immutable buffers, make predefined entities static structures, etc...</li> 2449 <li>rewrote all the error handling in the library, all errors can be 2450 intercepted at a structured level, with precise information 2451 available.</li> 2452 <li>New simpler and more generic XML and HTML parser APIs, allowing to 2453 easilly modify the parsing options and reuse parser context for multiple 2454 consecutive documents.</li> 2455 <li>Similar new APIs for the xmlReader, for options and reuse, provided new 2456 functions to access content as const strings, use them for Python 2457 bindings</li> 2458 <li>a lot of other smaller API improvements: xmlStrPrintf (Aleksey Sanin), 2459 Walker i.e. reader on a document tree based on Alfred Mickautsch code, 2460 make room in nodes for line numbers, reference counting and future PSVI 2461 extensions, generation of character ranges to be checked with faster 2462 algorithm (William), xmlParserMaxDepth (Crutcher Dunnavant), buffer 2463 access</li> 2464 <li>New xmlWriter API provided by Alfred Mickautsch</li> 2465 <li>Schemas: base64 support by Anthony Carrico</li> 2466 <li>Parser<->HTTP integration fix, proper processing of the Mime-Type 2467 and charset information if available.</li> 2468 <li>Relax-NG: bug fixes including the one reported by Martijn Faassen and 2469 zeroOrMore, better error reporting.</li> 2470 <li>Python bindings (Stphane Bidoul), never use stdout for errors 2471 output</li> 2472 <li>Portability: all the headers have macros for export and calling 2473 convention definitions (Igor Zlatkovic), VMS update (Craig A. Berry), 2474 Windows: threads (Jesse Pelton), Borland compiler (Eric Zurcher, Igor), 2475 Mingw (Igor), typos (Mark Vakoc), beta version (Stephane Bidoul), 2476 warning cleanups on AIX and MIPS compilers (William Brack), BeOS (Marcin 2477 'Shard' Konicki)</li> 2478 <li>Documentation fixes and README (William Brack), search fix (William), 2479 tutorial updates (John Fleck), namespace docs (Stefan Kost)</li> 2480 <li>Bug fixes: xmlCleanupParser (Dave Beckett), threading uninitialized 2481 mutexes, HTML doctype lowercase, SAX/IO (William), compression detection 2482 and restore (William), attribute declaration in DTDs (William), namespace 2483 on attribute in HTML output (William), input filename (Rob Richards), 2484 namespace DTD validation, xmlReplaceNode (Chris Ryland), I/O callbacks 2485 (Markus Keim), CDATA serialization (Shaun McCance), xmlReader (Peter 2486 Derr), high codepoint charref like &#x10FFFF;, buffer access in push 2487 mode (Justin Fletcher), TLS threads on Windows (Jesse Pelton), XPath bug 2488 (William), xmlCleanupParser (Marc Liyanage), CDATA output (William), HTTP 2489 error handling.</li> 2490 <li>xmllint options: --dtdvalidfpi for Tobias Reif, --sax1 for compat 2491 testing, --nodict for building without tree dictionnary, --nocdata to 2492 replace CDATA by text, --nsclean to remove surperfluous namespace 2493 declarations</li> 2494 <li>added xml2-config --libtool-libs option from Kevin P. Fleming</li> 2495 <li>a lot of profiling and tuning of the code, speedup patch for 2496 xmlSearchNs() by Luca Padovani. The xmlReader should do far less 2497 allocation and it speed should get closer to SAX. Chris Anderson worked 2498 on speeding and cleaning up repetitive checking code.</li> 2499 <li>cleanup of "make tests"</li> 2500 <li>libxml-2.0-uninstalled.pc from Malcolm Tredinnick</li> 2501 <li>deactivated the broken docBook SGML parser code and plugged the XML 2502 parser instead.</li> 2503 </ul> 2504 2505 <h3>2.5.11: Sep 9 2003</h3> 2506 2507 <p>A bugfix only release:</p> 2508 <ul> 2509 <li>risk of crash in Relax-NG</li> 2510 <li>risk of crash when using multithreaded programs</li> 2511 </ul> 2512 2513 <h3>2.5.10: Aug 15 2003</h3> 2514 2515 <p>A bugfixes only release</p> 2516 <ul> 2517 <li>Windows Makefiles (William Brack)</li> 2518 <li>UTF-16 support fixes (Mark Itzcovitz)</li> 2519 <li>Makefile and portability (William Brack) automake, Linux alpha, Mingw 2520 on Windows (Mikhail Grushinskiy)</li> 2521 <li>HTML parser (Oliver Stoeneberg)</li> 2522 <li>XInclude performance problem reported by Kevin Ruscoe</li> 2523 <li>XML parser performance problem reported by Grant Goodale</li> 2524 <li>xmlSAXParseDTD() bug fix from Malcolm Tredinnick</li> 2525 <li>and a couple other cleanup</li> 2526 </ul> 2527 2528 <h3>2.5.9: Aug 9 2003</h3> 2529 <ul> 2530 <li>bugfixes: IPv6 portability, xmlHasNsProp (Markus Keim), Windows build 2531 (Wiliam Brake, Jesse Pelton, Igor), Schemas (Peter Sobisch), threading 2532 (Rob Richards), hexBinary type (), UTF-16 BOM (Dodji Seketeli), 2533 xmlReader, Relax-NG schemas compilation, namespace handling, EXSLT (Sean 2534 Griffin), HTML parsing problem (William Brack), DTD validation for mixed 2535 content + namespaces, HTML serialization, library initialization, 2536 progressive HTML parser</li> 2537 <li>better interfaces for Relax-NG error handling (Joachim Bauch, )</li> 2538 <li>adding xmlXIncludeProcessTree() for XInclud'ing in a subtree</li> 2539 <li>doc fixes and improvements (John Fleck)</li> 2540 <li>configure flag for -with-fexceptions when embedding in C++</li> 2541 <li>couple of new UTF-8 helper functions (William Brack)</li> 2542 <li>general encoding cleanup + ISO-8859-x without iconv (Peter Jacobi)</li> 2543 <li>xmlTextReader cleanup + enum for node types (Bjorn Reese)</li> 2544 <li>general compilation/warning cleanup Solaris/HP-UX/... (William 2545 Brack)</li> 2546 </ul> 2547 2548 <h3>2.5.8: Jul 6 2003</h3> 2549 <ul> 2550 <li>bugfixes: XPath, XInclude, file/URI mapping, UTF-16 save (Mark 2551 Itzcovitz), UTF-8 checking, URI saving, error printing (William Brack), 2552 PI related memleak, compilation without schemas or without xpath (Joerg 2553 Schmitz-Linneweber/Garry Pennington), xmlUnlinkNode problem with DTDs, 2554 rpm problem on , i86_64, removed a few compilation problems from 2.5.7, 2555 xmlIOParseDTD, and xmlSAXParseDTD (Malcolm Tredinnick)</li> 2556 <li>portability: DJGPP (MsDos) , OpenVMS (Craig A. Berry)</li> 2557 <li>William Brack fixed multithreading lock problems</li> 2558 <li>IPv6 patch for FTP and HTTP accesses (Archana Shah/Wipro)</li> 2559 <li>Windows fixes (Igor Zlatkovic, Eric Zurcher), threading (Stphane 2560 Bidoul)</li> 2561 <li>A few W3C Schemas Structure improvements</li> 2562 <li>W3C Schemas Datatype improvements (Charlie Bozeman)</li> 2563 <li>Python bindings for thread globals (Stphane Bidoul), and method/class 2564 generator</li> 2565 <li>added --nonet option to xmllint</li> 2566 <li>documentation improvements (John Fleck)</li> 2567 </ul> 2568 2569 <h3>2.5.7: Apr 25 2003</h3> 2570 <ul> 2571 <li>Relax-NG: Compiling to regexp and streaming validation on top of the 2572 xmlReader interface, added to xmllint --stream</li> 2573 <li>xmlReader: Expand(), Next() and DOM access glue, bug fixes</li> 2574 <li>Support for large files: RGN validated a 4.5GB instance</li> 2575 <li>Thread support is now configured in by default</li> 2576 <li>Fixes: update of the Trio code (Bjorn), WXS Date and Duration fixes 2577 (Charles Bozeman), DTD and namespaces (Brent Hendricks), HTML push parser 2578 and zero bytes handling, some missing Windows file path conversions, 2579 behaviour of the parser and validator in the presence of "out of memory" 2580 error conditions</li> 2581 <li>extended the API to be able to plug a garbage collecting memory 2582 allocator, added xmlMallocAtomic() and modified the allocations 2583 accordingly.</li> 2584 <li>Performances: removed excessive malloc() calls, speedup of the push and 2585 xmlReader interfaces, removed excessive thread locking</li> 2586 <li>Documentation: man page (John Fleck), xmlReader documentation</li> 2587 <li>Python: adding binding for xmlCatalogAddLocal (Brent M Hendricks)</li> 2588 </ul> 2589 2590 <h3>2.5.6: Apr 1 2003</h3> 2591 <ul> 2592 <li>Fixed W3C XML Schemas datatype, should be compliant now except for 2593 binHex and base64 which are not supported yet.</li> 2594 <li>bug fixes: non-ASCII IDs, HTML output, XInclude on large docs and 2595 XInclude entities handling, encoding detection on external subsets, XML 2596 Schemas bugs and memory leaks, HTML parser (James Bursa)</li> 2597 <li>portability: python/trio (Albert Chin), Sun compiler warnings</li> 2598 <li>documentation: added --relaxng option to xmllint man page (John)</li> 2599 <li>improved error reporting: xml:space, start/end tag mismatches, Relax NG 2600 errors</li> 2601 </ul> 2602 2603 <h3>2.5.5: Mar 24 2003</h3> 2604 <ul> 2605 <li>Lot of fixes on the Relax NG implementation. More testing including 2606 DocBook and TEI examples.</li> 2607 <li>Increased the support for W3C XML Schemas datatype</li> 2608 <li>Several bug fixes in the URI handling layer</li> 2609 <li>Bug fixes: HTML parser, xmlReader, DTD validation, XPath, encoding 2610 conversion, line counting in the parser.</li> 2611 <li>Added support for $XMLLINT_INDENT environment variable, FTP delete</li> 2612 <li>Fixed the RPM spec file name</li> 2613 </ul> 2614 2615 <h3>2.5.4: Feb 20 2003</h3> 2616 <ul> 2617 <li>Conformance testing and lot of fixes on Relax NG and XInclude 2618 implementation</li> 2619 <li>Implementation of XPointer element() scheme</li> 2620 <li>Bug fixes: XML parser, XInclude entities merge, validity checking on 2621 namespaces, 2622 <p>2 serialization bugs, node info generation problems, a DTD regexp 2623 generation problem.</p> 2624 </li> 2625 <li>Portability: windows updates and path canonicalization (Igor)</li> 2626 <li>A few typo fixes (Kjartan Maraas)</li> 2627 <li>Python bindings generator fixes (Stephane Bidoul)</li> 2628 </ul> 2629 2630 <h3>2.5.3: Feb 10 2003</h3> 2631 <ul> 2632 <li>RelaxNG and XML Schemas datatypes improvements, and added a first 2633 version of RelaxNG Python bindings</li> 2634 <li>Fixes: XLink (Sean Chittenden), XInclude (Sean Chittenden), API fix for 2635 serializing namespace nodes, encoding conversion bug, XHTML1 2636 serialization</li> 2637 <li>Portability fixes: Windows (Igor), AMD 64bits RPM spec file</li> 2638 </ul> 2639 2640 <h3>2.5.2: Feb 5 2003</h3> 2641 <ul> 2642 <li>First implementation of RelaxNG, added --relaxng flag to xmllint</li> 2643 <li>Schemas support now compiled in by default.</li> 2644 <li>Bug fixes: DTD validation, namespace checking, XInclude and entities, 2645 delegateURI in XML Catalogs, HTML parser, XML reader (Stphane Bidoul), 2646 XPath parser and evaluation, UTF8ToUTF8 serialization, XML reader memory 2647 consumption, HTML parser, HTML serialization in the presence of 2648 namespaces</li> 2649 <li>added an HTML API to check elements and attributes.</li> 2650 <li>Documentation improvement, PDF for the tutorial (John Fleck), doc 2651 patches (Stefan Kost)</li> 2652 <li>Portability fixes: NetBSD (Julio Merino), Windows (Igor Zlatkovic)</li> 2653 <li>Added python bindings for XPointer, contextual error reporting 2654 (Stphane Bidoul)</li> 2655 <li>URI/file escaping problems (Stefano Zacchiroli)</li> 2656 </ul> 2657 2658 <h3>2.5.1: Jan 8 2003</h3> 2659 <ul> 2660 <li>Fixes a memory leak and configuration/compilation problems in 2.5.0</li> 2661 <li>documentation updates (John)</li> 2662 <li>a couple of XmlTextReader fixes</li> 2663 </ul> 2664 2665 <h3>2.5.0: Jan 6 2003</h3> 2666 <ul> 2667 <li>New <a href="xmlreader.html">XmltextReader interface</a> based on C# 2668 API (with help of Stphane Bidoul)</li> 2669 <li>Windows: more exports, including the new API (Igor)</li> 2670 <li>XInclude fallback fix</li> 2671 <li>Python: bindings for the new API, packaging (Stphane Bidoul), 2672 drv_libxml2.py Python xml.sax driver (Stphane Bidoul), fixes, speedup 2673 and iterators for Python-2.2 (Hannu Krosing)</li> 2674 <li>Tutorial fixes (john Fleck and Niraj Tolia) xmllint man update 2675 (John)</li> 2676 <li>Fix an XML parser bug raised by Vyacheslav Pindyura</li> 2677 <li>Fix for VMS serialization (Nigel Hall) and config (Craig A. Berry)</li> 2678 <li>Entities handling fixes</li> 2679 <li>new API to optionally track node creation and deletion (Lukas 2680 Schroeder)</li> 2681 <li>Added documentation for the XmltextReader interface and some <a 2682 href="guidelines.html">XML guidelines</a></li> 2683 </ul> 2684 2685 <h3>2.4.30: Dec 12 2002</h3> 2686 <ul> 2687 <li>2.4.29 broke the python bindings, rereleasing</li> 2688 <li>Improvement/fixes of the XML API generator, and couple of minor code 2689 fixes.</li> 2690 </ul> 2691 2692 <h3>2.4.29: Dec 11 2002</h3> 2693 <ul> 2694 <li>Windows fixes (Igor): Windows CE port, pthread linking, python bindings 2695 (Stphane Bidoul), Mingw (Magnus Henoch), and export list updates</li> 2696 <li>Fix for prev in python bindings (ERDI Gergo)</li> 2697 <li>Fix for entities handling (Marcus Clarke)</li> 2698 <li>Refactored the XML and HTML dumps to a single code path, fixed XHTML1 2699 dump</li> 2700 <li>Fix for URI parsing when handling URNs with fragment identifiers</li> 2701 <li>Fix for HTTP URL escaping problem</li> 2702 <li>added an TextXmlReader (C#) like API (work in progress)</li> 2703 <li>Rewrote the API in XML generation script, includes a C parser and saves 2704 more information needed for C# bindings</li> 2705 </ul> 2706 2707 <h3>2.4.28: Nov 22 2002</h3> 2708 <ul> 2709 <li>a couple of python binding fixes</li> 2710 <li>2 bug fixes in the XML push parser</li> 2711 <li>potential memory leak removed (Martin Stoilov)</li> 2712 <li>fix to the configure script for Unix (Dimitri Papadopoulos)</li> 2713 <li>added encoding support for XInclude parse="text"</li> 2714 <li>autodetection of XHTML1 and specific serialization rules added</li> 2715 <li>nasty threading bug fixed (William Brack)</li> 2716 </ul> 2717 2718 <h3>2.4.27: Nov 17 2002</h3> 2719 <ul> 2720 <li>fixes for the Python bindings</li> 2721 <li>a number of bug fixes: SGML catalogs, xmlParseBalancedChunkMemory(), 2722 HTML parser, Schemas (Charles Bozeman), document fragment support 2723 (Christian Glahn), xmlReconciliateNs (Brian Stafford), XPointer, 2724 xmlFreeNode(), xmlSAXParseMemory (Peter Jones), xmlGetNodePath (Petr 2725 Pajas), entities processing</li> 2726 <li>added grep to xmllint --shell</li> 2727 <li>VMS update patch from Craig A. Berry</li> 2728 <li>cleanup of the Windows build with support for more compilers (Igor), 2729 better thread support on Windows</li> 2730 <li>cleanup of Unix Makefiles and spec file</li> 2731 <li>Improvements to the documentation (John Fleck)</li> 2732 </ul> 2733 2734 <h3>2.4.26: Oct 18 2002</h3> 2735 <ul> 2736 <li>Patches for Windows CE port, improvements on Windows paths handling</li> 2737 <li>Fixes to the validation code (DTD and Schemas), xmlNodeGetPath() , 2738 HTML serialization, Namespace compliance, and a number of small 2739 problems</li> 2740 </ul> 2741 2742 <h3>2.4.25: Sep 26 2002</h3> 2743 <ul> 2744 <li>A number of bug fixes: XPath, validation, Python bindings, DOM and 2745 tree, xmlI/O, Html</li> 2746 <li>Serious rewrite of XInclude</li> 2747 <li>Made XML Schemas regexp part of the default build and APIs, small fix 2748 and improvement of the regexp core</li> 2749 <li>Changed the validation code to reuse XML Schemas regexp APIs</li> 2750 <li>Better handling of Windows file paths, improvement of Makefiles (Igor, 2751 Daniel Gehriger, Mark Vakoc)</li> 2752 <li>Improved the python I/O bindings, the tests, added resolver and regexp 2753 APIs</li> 2754 <li>New logos from Marc Liyanage</li> 2755 <li>Tutorial improvements: John Fleck, Christopher Harris</li> 2756 <li>Makefile: Fixes for AMD x86_64 (Mandrake), DESTDIR (Christophe 2757 Merlet)</li> 2758 <li>removal of all stderr/perror use for error reporting</li> 2759 <li>Better error reporting: XPath and DTD validation</li> 2760 <li>update of the trio portability layer (Bjorn Reese)</li> 2761 </ul> 2762 2763 <p><strong>2.4.24: Aug 22 2002</strong></p> 2764 <ul> 2765 <li>XPath fixes (William), xf:escape-uri() (Wesley Terpstra)</li> 2766 <li>Python binding fixes: makefiles (William), generator, rpm build, x86-64 2767 (fcrozat)</li> 2768 <li>HTML <style> and boolean attributes serializer fixes</li> 2769 <li>C14N improvements by Aleksey</li> 2770 <li>doc cleanups: Rick Jones</li> 2771 <li>Windows compiler makefile updates: Igor and Elizabeth Barham</li> 2772 <li>XInclude: implementation of fallback and xml:base fixup added</li> 2773 </ul> 2774 2775 <h3>2.4.23: July 6 2002</h3> 2776 <ul> 2777 <li>performances patches: Peter Jacobi</li> 2778 <li>c14n fixes, testsuite and performances: Aleksey Sanin</li> 2779 <li>added xmlDocFormatDump: Chema Celorio</li> 2780 <li>new tutorial: John Fleck</li> 2781 <li>new hash functions and performances: Sander Vesik, portability fix from 2782 Peter Jacobi</li> 2783 <li>a number of bug fixes: XPath (William Brack, Richard Jinks), XML and 2784 HTML parsers, ID lookup function</li> 2785 <li>removal of all remaining sprintf: Aleksey Sanin</li> 2786 </ul> 2787 2788 <h3>2.4.22: May 27 2002</h3> 2789 <ul> 2790 <li>a number of bug fixes: configure scripts, base handling, parser, memory 2791 usage, HTML parser, XPath, documentation (Christian Cornelssen), 2792 indentation, URI parsing</li> 2793 <li>Optimizations for XMLSec, fixing and making public some of the network 2794 protocol handlers (Aleksey)</li> 2795 <li>performance patch from Gary Pennington</li> 2796 <li>Charles Bozeman provided date and time support for XML Schemas 2797 datatypes</li> 2798 </ul> 2799 2800 <h3>2.4.21: Apr 29 2002</h3> 2801 2802 <p>This release is both a bug fix release and also contains the early XML 2803 Schemas <a href="http://www.w3.org/TR/xmlschema-1/">structures</a> and <a 2804 href="http://www.w3.org/TR/xmlschema-2/">datatypes</a> code, beware, all 2805 interfaces are likely to change, there is huge holes, it is clearly a work in 2806 progress and don't even think of putting this code in a production system, 2807 it's actually not compiled in by default. The real fixes are: 2808 </p> 2809 2810 <ul> 2811 <li>a couple of bugs or limitations introduced in 2.4.20</li> 2812 <li>patches for Borland C++ and MSC by Igor</li> 2813 <li>some fixes on XPath strings and conformance patches by Richard 2814 Jinks</li> 2815 <li>patch from Aleksey for the ExcC14N specification</li> 2816 <li>OSF/1 bug fix by Bjorn</li> 2817 </ul> 2818 2819 <h3>2.4.20: Apr 15 2002</h3> 2820 <ul> 2821 <li>bug fixes: file descriptor leak, XPath, HTML output, DTD validation</li> 2822 <li>XPath conformance testing by Richard Jinks</li> 2823 <li>Portability fixes: Solaris, MPE/iX, Windows, OSF/1, python bindings, 2824 libxml.m4</li> 2825 </ul> 2826 2827 <h3>2.4.19: Mar 25 2002</h3> 2828 <ul> 2829 <li>bug fixes: half a dozen XPath bugs, Validation, ISO-Latin to UTF8 2830 encoder</li> 2831 <li>portability fixes in the HTTP code</li> 2832 <li>memory allocation checks using valgrind, and profiling tests</li> 2833 <li>revamp of the Windows build and Makefiles</li> 2834 </ul> 2835 2836 <h3>2.4.18: Mar 18 2002</h3> 2837 <ul> 2838 <li>bug fixes: tree, SAX, canonicalization, validation, portability, 2839 XPath</li> 2840 <li>removed the --with-buffer option it was becoming unmaintainable</li> 2841 <li>serious cleanup of the Python makefiles</li> 2842 <li>speedup patch to XPath very effective for DocBook stylesheets</li> 2843 <li>Fixes for Windows build, cleanup of the documentation</li> 2844 </ul> 2845 2846 <h3>2.4.17: Mar 8 2002</h3> 2847 <ul> 2848 <li>a lot of bug fixes, including "namespace nodes have no parents in 2849 XPath"</li> 2850 <li>fixed/improved the Python wrappers, added more examples and more 2851 regression tests, XPath extension functions can now return node-sets</li> 2852 <li>added the XML Canonicalization support from Aleksey Sanin</li> 2853 </ul> 2854 2855 <h3>2.4.16: Feb 20 2002</h3> 2856 <ul> 2857 <li>a lot of bug fixes, most of them were triggered by the XML Testsuite 2858 from OASIS and W3C. Compliance has been significantly improved.</li> 2859 <li>a couple of portability fixes too.</li> 2860 </ul> 2861 2862 <h3>2.4.15: Feb 11 2002</h3> 2863 <ul> 2864 <li>Fixed the Makefiles, especially the python module ones</li> 2865 <li>A few bug fixes and cleanup</li> 2866 <li>Includes cleanup</li> 2867 </ul> 2868 2869 <h3>2.4.14: Feb 8 2002</h3> 2870 <ul> 2871 <li>Change of License to the <a 2872 href="http://www.opensource.org/licenses/mit-license.html">MIT 2873 License</a> basically for integration in XFree86 codebase, and removing 2874 confusion around the previous dual-licensing</li> 2875 <li>added Python bindings, beta software but should already be quite 2876 complete</li> 2877 <li>a large number of fixes and cleanups, especially for all tree 2878 manipulations</li> 2879 <li>cleanup of the headers, generation of a reference API definition in 2880 XML</li> 2881 </ul> 2882 2883 <h3>2.4.13: Jan 14 2002</h3> 2884 <ul> 2885 <li>update of the documentation: John Fleck and Charlie Bozeman</li> 2886 <li>cleanup of timing code from Justin Fletcher</li> 2887 <li>fixes for Windows and initial thread support on Win32: Igor and Serguei 2888 Narojnyi</li> 2889 <li>Cygwin patch from Robert Collins</li> 2890 <li>added xmlSetEntityReferenceFunc() for Keith Isdale work on xsldbg</li> 2891 </ul> 2892 2893 <h3>2.4.12: Dec 7 2001</h3> 2894 <ul> 2895 <li>a few bug fixes: thread (Gary Pennington), xmllint (Geert Kloosterman), 2896 XML parser (Robin Berjon), XPointer (Danny Jamshy), I/O cleanups 2897 (robert)</li> 2898 <li>Eric Lavigne contributed project files for MacOS</li> 2899 <li>some makefiles cleanups</li> 2900 </ul> 2901 2902 <h3>2.4.11: Nov 26 2001</h3> 2903 <ul> 2904 <li>fixed a couple of errors in the includes, fixed a few bugs, some code 2905 cleanups</li> 2906 <li>xmllint man pages improvement by Heiko Rupp</li> 2907 <li>updated VMS build instructions from John A Fotheringham</li> 2908 <li>Windows Makefiles updates from Igor</li> 2909 </ul> 2910 2911 <h3>2.4.10: Nov 10 2001</h3> 2912 <ul> 2913 <li>URI escaping fix (Joel Young)</li> 2914 <li>added xmlGetNodePath() (for paths or XPointers generation)</li> 2915 <li>Fixes namespace handling problems when using DTD and validation</li> 2916 <li>improvements on xmllint: Morus Walter patches for --format and 2917 --encode, Stefan Kost and Heiko Rupp improvements on the --shell</li> 2918 <li>fixes for xmlcatalog linking pointed by Weiqi Gao</li> 2919 <li>fixes to the HTML parser</li> 2920 </ul> 2921 2922 <h3>2.4.9: Nov 6 2001</h3> 2923 <ul> 2924 <li>fixes more catalog bugs</li> 2925 <li>avoid a compilation problem, improve xmlGetLineNo()</li> 2926 </ul> 2927 2928 <h3>2.4.8: Nov 4 2001</h3> 2929 <ul> 2930 <li>fixed SGML catalogs broken in previous release, updated xmlcatalog 2931 tool</li> 2932 <li>fixed a compile errors and some includes troubles.</li> 2933 </ul> 2934 2935 <h3>2.4.7: Oct 30 2001</h3> 2936 <ul> 2937 <li>exported some debugging interfaces</li> 2938 <li>serious rewrite of the catalog code</li> 2939 <li>integrated Gary Pennington thread safety patch, added configure option 2940 and regression tests</li> 2941 <li>removed an HTML parser bug</li> 2942 <li>fixed a couple of potentially serious validation bugs</li> 2943 <li>integrated the SGML DocBook support in xmllint</li> 2944 <li>changed the nanoftp anonymous login passwd</li> 2945 <li>some I/O cleanup and a couple of interfaces for Perl wrapper</li> 2946 <li>general bug fixes</li> 2947 <li>updated xmllint man page by John Fleck</li> 2948 <li>some VMS and Windows updates</li> 2949 </ul> 2950 2951 <h3>2.4.6: Oct 10 2001</h3> 2952 <ul> 2953 <li>added an updated man pages by John Fleck</li> 2954 <li>portability and configure fixes</li> 2955 <li>an infinite loop on the HTML parser was removed (William)</li> 2956 <li>Windows makefile patches from Igor</li> 2957 <li>fixed half a dozen bugs reported for libxml or libxslt</li> 2958 <li>updated xmlcatalog to be able to modify SGML super catalogs</li> 2959 </ul> 2960 2961 <h3>2.4.5: Sep 14 2001</h3> 2962 <ul> 2963 <li>Remove a few annoying bugs in 2.4.4</li> 2964 <li>forces the HTML serializer to output decimal charrefs since some 2965 version of Netscape can't handle hexadecimal ones</li> 2966 </ul> 2967 2968 <h3>1.8.16: Sep 14 2001</h3> 2969 <ul> 2970 <li>maintenance release of the old libxml1 branch, couple of bug and 2971 portability fixes</li> 2972 </ul> 2973 2974 <h3>2.4.4: Sep 12 2001</h3> 2975 <ul> 2976 <li>added --convert to xmlcatalog, bug fixes and cleanups of XML 2977 Catalog</li> 2978 <li>a few bug fixes and some portability changes</li> 2979 <li>some documentation cleanups</li> 2980 </ul> 2981 2982 <h3>2.4.3: Aug 23 2001</h3> 2983 <ul> 2984 <li>XML Catalog support see the doc</li> 2985 <li>New NaN/Infinity floating point code</li> 2986 <li>A few bug fixes</li> 2987 </ul> 2988 2989 <h3>2.4.2: Aug 15 2001</h3> 2990 <ul> 2991 <li>adds xmlLineNumbersDefault() to control line number generation</li> 2992 <li>lot of bug fixes</li> 2993 <li>the Microsoft MSC projects files should now be up to date</li> 2994 <li>inheritance of namespaces from DTD defaulted attributes</li> 2995 <li>fixes a serious potential security bug</li> 2996 <li>added a --format option to xmllint</li> 2997 </ul> 2998 2999 <h3>2.4.1: July 24 2001</h3> 3000 <ul> 3001 <li>possibility to keep line numbers in the tree</li> 3002 <li>some computation NaN fixes</li> 3003 <li>extension of the XPath API</li> 3004 <li>cleanup for alpha and ia64 targets</li> 3005 <li>patch to allow saving through HTTP PUT or POST</li> 3006 </ul> 3007 3008 <h3>2.4.0: July 10 2001</h3> 3009 <ul> 3010 <li>Fixed a few bugs in XPath, validation, and tree handling.</li> 3011 <li>Fixed XML Base implementation, added a couple of examples to the 3012 regression tests</li> 3013 <li>A bit of cleanup</li> 3014 </ul> 3015 3016 <h3>2.3.14: July 5 2001</h3> 3017 <ul> 3018 <li>fixed some entities problems and reduce memory requirement when 3019 substituting them</li> 3020 <li>lots of improvements in the XPath queries interpreter can be 3021 substantially faster</li> 3022 <li>Makefiles and configure cleanups</li> 3023 <li>Fixes to XPath variable eval, and compare on empty node set</li> 3024 <li>HTML tag closing bug fixed</li> 3025 <li>Fixed an URI reference computation problem when validating</li> 3026 </ul> 3027 3028 <h3>2.3.13: June 28 2001</h3> 3029 <ul> 3030 <li>2.3.12 configure.in was broken as well as the push mode XML parser</li> 3031 <li>a few more fixes for compilation on Windows MSC by Yon Derek</li> 3032 </ul> 3033 3034 <h3>1.8.14: June 28 2001</h3> 3035 <ul> 3036 <li>Zbigniew Chyla gave a patch to use the old XML parser in push mode</li> 3037 <li>Small Makefile fix</li> 3038 </ul> 3039 3040 <h3>2.3.12: June 26 2001</h3> 3041 <ul> 3042 <li>lots of cleanup</li> 3043 <li>a couple of validation fix</li> 3044 <li>fixed line number counting</li> 3045 <li>fixed serious problems in the XInclude processing</li> 3046 <li>added support for UTF8 BOM at beginning of entities</li> 3047 <li>fixed a strange gcc optimizer bugs in xpath handling of float, gcc-3.0 3048 miscompile uri.c (William), Thomas Leitner provided a fix for the 3049 optimizer on Tru64</li> 3050 <li>incorporated Yon Derek and Igor Zlatkovic fixes and improvements for 3051 compilation on Windows MSC</li> 3052 <li>update of libxml-doc.el (Felix Natter)</li> 3053 <li>fixed 2 bugs in URI normalization code</li> 3054 </ul> 3055 3056 <h3>2.3.11: June 17 2001</h3> 3057 <ul> 3058 <li>updates to trio, Makefiles and configure should fix some portability 3059 problems (alpha)</li> 3060 <li>fixed some HTML serialization problems (pre, script, and block/inline 3061 handling), added encoding aware APIs, cleanup of this code</li> 3062 <li>added xmlHasNsProp()</li> 3063 <li>implemented a specific PI for encoding support in the DocBook SGML 3064 parser</li> 3065 <li>some XPath fixes (-Infinity, / as a function parameter and namespaces 3066 node selection)</li> 3067 <li>fixed a performance problem and an error in the validation code</li> 3068 <li>fixed XInclude routine to implement the recursive behaviour</li> 3069 <li>fixed xmlFreeNode problem when libxml is included statically twice</li> 3070 <li>added --version to xmllint for bug reports</li> 3071 </ul> 3072 3073 <h3>2.3.10: June 1 2001</h3> 3074 <ul> 3075 <li>fixed the SGML catalog support</li> 3076 <li>a number of reported bugs got fixed, in XPath, iconv detection, 3077 XInclude processing</li> 3078 <li>XPath string function should now handle unicode correctly</li> 3079 </ul> 3080 3081 <h3>2.3.9: May 19 2001</h3> 3082 3083 <p>Lots of bugfixes, and added a basic SGML catalog support: 3084 </p> 3085 <ul> 3086 <li>HTML push bugfix #54891 and another patch from Jonas Borgstrom</li> 3087 <li>some serious speed optimization again</li> 3088 <li>some documentation cleanups</li> 3089 <li>trying to get better linking on Solaris (-R)</li> 3090 <li>XPath API cleanup from Thomas Broyer</li> 3091 <li>Validation bug fixed #54631, added a patch from Gary Pennington, fixed 3092 xmlValidGetValidElements()</li> 3093 <li>Added an INSTALL file</li> 3094 <li>Attribute removal added to API: #54433</li> 3095 <li>added a basic support for SGML catalogs</li> 3096 <li>fixed xmlKeepBlanksDefault(0) API</li> 3097 <li>bugfix in xmlNodeGetLang()</li> 3098 <li>fixed a small configure portability problem</li> 3099 <li>fixed an inversion of SYSTEM and PUBLIC identifier in HTML document</li> 3100 </ul> 3101 3102 <h3>1.8.13: May 14 2001</h3> 3103 <ul> 3104 <li>bugfixes release of the old libxml1 branch used by Gnome</li> 3105 </ul> 3106 3107 <h3>2.3.8: May 3 2001</h3> 3108 <ul> 3109 <li>Integrated an SGML DocBook parser for the Gnome project</li> 3110 <li>Fixed a few things in the HTML parser</li> 3111 <li>Fixed some XPath bugs raised by XSLT use, tried to fix the floating 3112 point portability issue</li> 3113 <li>Speed improvement (8M/s for SAX, 3M/s for DOM, 1.5M/s for 3114 DOM+validation using the XML REC as input and a 700MHz celeron).</li> 3115 <li>incorporated more Windows cleanup</li> 3116 <li>added xmlSaveFormatFile()</li> 3117 <li>fixed problems in copying nodes with entities references (gdome)</li> 3118 <li>removed some troubles surrounding the new validation module</li> 3119 </ul> 3120 3121 <h3>2.3.7: April 22 2001</h3> 3122 <ul> 3123 <li>lots of small bug fixes, corrected XPointer</li> 3124 <li>Non deterministic content model validation support</li> 3125 <li>added xmlDocCopyNode for gdome2</li> 3126 <li>revamped the way the HTML parser handles end of tags</li> 3127 <li>XPath: corrections of namespaces support and number formatting</li> 3128 <li>Windows: Igor Zlatkovic patches for MSC compilation</li> 3129 <li>HTML output fixes from P C Chow and William M. Brack</li> 3130 <li>Improved validation speed sensible for DocBook</li> 3131 <li>fixed a big bug with ID declared in external parsed entities</li> 3132 <li>portability fixes, update of Trio from Bjorn Reese</li> 3133 </ul> 3134 3135 <h3>2.3.6: April 8 2001</h3> 3136 <ul> 3137 <li>Code cleanup using extreme gcc compiler warning options, found and 3138 cleared half a dozen potential problem</li> 3139 <li>the Eazel team found an XML parser bug</li> 3140 <li>cleaned up the user of some of the string formatting function. used the 3141 trio library code to provide the one needed when the platform is missing 3142 them</li> 3143 <li>xpath: removed a memory leak and fixed the predicate evaluation 3144 problem, extended the testsuite and cleaned up the result. XPointer seems 3145 broken ...</li> 3146 </ul> 3147 3148 <h3>2.3.5: Mar 23 2001</h3> 3149 <ul> 3150 <li>Biggest change is separate parsing and evaluation of XPath expressions, 3151 there is some new APIs for this too</li> 3152 <li>included a number of bug fixes(XML push parser, 51876, notations, 3153 52299)</li> 3154 <li>Fixed some portability issues</li> 3155 </ul> 3156 3157 <h3>2.3.4: Mar 10 2001</h3> 3158 <ul> 3159 <li>Fixed bugs #51860 and #51861</li> 3160 <li>Added a global variable xmlDefaultBufferSize to allow default buffer 3161 size to be application tunable.</li> 3162 <li>Some cleanup in the validation code, still a bug left and this part 3163 should probably be rewritten to support ambiguous content model :-\</li> 3164 <li>Fix a couple of serious bugs introduced or raised by changes in 2.3.3 3165 parser</li> 3166 <li>Fixed another bug in xmlNodeGetContent()</li> 3167 <li>Bjorn fixed XPath node collection and Number formatting</li> 3168 <li>Fixed a loop reported in the HTML parsing</li> 3169 <li>blank space are reported even if the Dtd content model proves that they 3170 are formatting spaces, this is for XML conformance</li> 3171 </ul> 3172 3173 <h3>2.3.3: Mar 1 2001</h3> 3174 <ul> 3175 <li>small change in XPath for XSLT</li> 3176 <li>documentation cleanups</li> 3177 <li>fix in validation by Gary Pennington</li> 3178 <li>serious parsing performances improvements</li> 3179 </ul> 3180 3181 <h3>2.3.2: Feb 24 2001</h3> 3182 <ul> 3183 <li>chasing XPath bugs, found a bunch, completed some TODO</li> 3184 <li>fixed a Dtd parsing bug</li> 3185 <li>fixed a bug in xmlNodeGetContent</li> 3186 <li>ID/IDREF support partly rewritten by Gary Pennington</li> 3187 </ul> 3188 3189 <h3>2.3.1: Feb 15 2001</h3> 3190 <ul> 3191 <li>some XPath and HTML bug fixes for XSLT</li> 3192 <li>small extension of the hash table interfaces for DOM gdome2 3193 implementation</li> 3194 <li>A few bug fixes</li> 3195 </ul> 3196 3197 <h3>2.3.0: Feb 8 2001 (2.2.12 was on 25 Jan but I didn't kept track)</h3> 3198 <ul> 3199 <li>Lots of XPath bug fixes</li> 3200 <li>Add a mode with Dtd lookup but without validation error reporting for 3201 XSLT</li> 3202 <li>Add support for text node without escaping (XSLT)</li> 3203 <li>bug fixes for xmlCheckFilename</li> 3204 <li>validation code bug fixes from Gary Pennington</li> 3205 <li>Patch from Paul D. Smith correcting URI path normalization</li> 3206 <li>Patch to allow simultaneous install of libxml-devel and 3207 libxml2-devel</li> 3208 <li>the example Makefile is now fixed</li> 3209 <li>added HTML to the RPM packages</li> 3210 <li>tree copying bugfixes</li> 3211 <li>updates to Windows makefiles</li> 3212 <li>optimization patch from Bjorn Reese</li> 3213 </ul> 3214 3215 <h3>2.2.11: Jan 4 2001</h3> 3216 <ul> 3217 <li>bunch of bug fixes (memory I/O, xpath, ftp/http, ...)</li> 3218 <li>added htmlHandleOmittedElem()</li> 3219 <li>Applied Bjorn Reese's IPV6 first patch</li> 3220 <li>Applied Paul D. Smith patches for validation of XInclude results</li> 3221 <li>added XPointer xmlns() new scheme support</li> 3222 </ul> 3223 3224 <h3>2.2.10: Nov 25 2000</h3> 3225 <ul> 3226 <li>Fix the Windows problems of 2.2.8</li> 3227 <li>integrate OpenVMS patches</li> 3228 <li>better handling of some nasty HTML input</li> 3229 <li>Improved the XPointer implementation</li> 3230 <li>integrate a number of provided patches</li> 3231 </ul> 3232 3233 <h3>2.2.9: Nov 25 2000</h3> 3234 <ul> 3235 <li>erroneous release :-(</li> 3236 </ul> 3237 3238 <h3>2.2.8: Nov 13 2000</h3> 3239 <ul> 3240 <li>First version of <a href="http://www.w3.org/TR/xinclude">XInclude</a> 3241 support</li> 3242 <li>Patch in conditional section handling</li> 3243 <li>updated MS compiler project</li> 3244 <li>fixed some XPath problems</li> 3245 <li>added an URI escaping function</li> 3246 <li>some other bug fixes</li> 3247 </ul> 3248 3249 <h3>2.2.7: Oct 31 2000</h3> 3250 <ul> 3251 <li>added message redirection</li> 3252 <li>XPath improvements (thanks TOM !)</li> 3253 <li>xmlIOParseDTD() added</li> 3254 <li>various small fixes in the HTML, URI, HTTP and XPointer support</li> 3255 <li>some cleanup of the Makefile, autoconf and the distribution content</li> 3256 </ul> 3257 3258 <h3>2.2.6: Oct 25 2000:</h3> 3259 <ul> 3260 <li>Added an hash table module, migrated a number of internal structure to 3261 those</li> 3262 <li>Fixed a posteriori validation problems</li> 3263 <li>HTTP module cleanups</li> 3264 <li>HTML parser improvements (tag errors, script/style handling, attribute 3265 normalization)</li> 3266 <li>coalescing of adjacent text nodes</li> 3267 <li>couple of XPath bug fixes, exported the internal API</li> 3268 </ul> 3269 3270 <h3>2.2.5: Oct 15 2000:</h3> 3271 <ul> 3272 <li>XPointer implementation and testsuite</li> 3273 <li>Lot of XPath fixes, added variable and functions registration, more 3274 tests</li> 3275 <li>Portability fixes, lots of enhancements toward an easy Windows build 3276 and release</li> 3277 <li>Late validation fixes</li> 3278 <li>Integrated a lot of contributed patches</li> 3279 <li>added memory management docs</li> 3280 <li>a performance problem when using large buffer seems fixed</li> 3281 </ul> 3282 3283 <h3>2.2.4: Oct 1 2000:</h3> 3284 <ul> 3285 <li>main XPath problem fixed</li> 3286 <li>Integrated portability patches for Windows</li> 3287 <li>Serious bug fixes on the URI and HTML code</li> 3288 </ul> 3289 3290 <h3>2.2.3: Sep 17 2000</h3> 3291 <ul> 3292 <li>bug fixes</li> 3293 <li>cleanup of entity handling code</li> 3294 <li>overall review of all loops in the parsers, all sprintf usage has been 3295 checked too</li> 3296 <li>Far better handling of larges Dtd. Validating against DocBook XML Dtd 3297 works smoothly now.</li> 3298 </ul> 3299 3300 <h3>1.8.10: Sep 6 2000</h3> 3301 <ul> 3302 <li>bug fix release for some Gnome projects</li> 3303 </ul> 3304 3305 <h3>2.2.2: August 12 2000</h3> 3306 <ul> 3307 <li>mostly bug fixes</li> 3308 <li>started adding routines to access xml parser context options</li> 3309 </ul> 3310 3311 <h3>2.2.1: July 21 2000</h3> 3312 <ul> 3313 <li>a purely bug fixes release</li> 3314 <li>fixed an encoding support problem when parsing from a memory block</li> 3315 <li>fixed a DOCTYPE parsing problem</li> 3316 <li>removed a bug in the function allowing to override the memory 3317 allocation routines</li> 3318 </ul> 3319 3320 <h3>2.2.0: July 14 2000</h3> 3321 <ul> 3322 <li>applied a lot of portability fixes</li> 3323 <li>better encoding support/cleanup and saving (content is now always 3324 encoded in UTF-8)</li> 3325 <li>the HTML parser now correctly handles encodings</li> 3326 <li>added xmlHasProp()</li> 3327 <li>fixed a serious problem with &#38;</li> 3328 <li>propagated the fix to FTP client</li> 3329 <li>cleanup, bugfixes, etc ...</li> 3330 <li>Added a page about <a href="encoding.html">libxml Internationalization 3331 support</a></li> 3332 </ul> 3333 3334 <h3>1.8.9: July 9 2000</h3> 3335 <ul> 3336 <li>fixed the spec the RPMs should be better</li> 3337 <li>fixed a serious bug in the FTP implementation, released 1.8.9 to solve 3338 rpmfind users problem</li> 3339 </ul> 3340 3341 <h3>2.1.1: July 1 2000</h3> 3342 <ul> 3343 <li>fixes a couple of bugs in the 2.1.0 packaging</li> 3344 <li>improvements on the HTML parser</li> 3345 </ul> 3346 3347 <h3>2.1.0 and 1.8.8: June 29 2000</h3> 3348 <ul> 3349 <li>1.8.8 is mostly a commodity package for upgrading to libxml2 according 3350 to <a href="upgrade.html">new instructions</a>. It fixes a nasty problem 3351 about &#38; charref parsing</li> 3352 <li>2.1.0 also ease the upgrade from libxml v1 to the recent version. it 3353 also contains numerous fixes and enhancements: 3354 <ul> 3355 <li>added xmlStopParser() to stop parsing</li> 3356 <li>improved a lot parsing speed when there is large CDATA blocs</li> 3357 <li>includes XPath patches provided by Picdar Technology</li> 3358 <li>tried to fix as much as possible DTD validation and namespace 3359 related problems</li> 3360 <li>output to a given encoding has been added/tested</li> 3361 <li>lot of various fixes</li> 3362 </ul> 3363 </li> 3364 </ul> 3365 3366 <h3>2.0.0: Apr 12 2000</h3> 3367 <ul> 3368 <li>First public release of libxml2. If you are using libxml, it's a good 3369 idea to check the 1.x to 2.x upgrade instructions. NOTE: while initially 3370 scheduled for Apr 3 the release occurred only on Apr 12 due to massive 3371 workload.</li> 3372 <li>The include are now located under $prefix/include/libxml (instead of 3373 $prefix/include/gnome-xml), they also are referenced by 3374 <pre>#include <libxml/xxx.h></pre> 3375 <p>instead of</p> 3376 <pre>#include "xxx.h"</pre> 3377 </li> 3378 <li>a new URI module for parsing URIs and following strictly RFC 2396</li> 3379 <li>the memory allocation routines used by libxml can now be overloaded 3380 dynamically by using xmlMemSetup()</li> 3381 <li>The previously CVS only tool tester has been renamed 3382 <strong>xmllint</strong> and is now installed as part of the libxml2 3383 package</li> 3384 <li>The I/O interface has been revamped. There is now ways to plug in 3385 specific I/O modules, either at the URI scheme detection level using 3386 xmlRegisterInputCallbacks() or by passing I/O functions when creating a 3387 parser context using xmlCreateIOParserCtxt()</li> 3388 <li>there is a C preprocessor macro LIBXML_VERSION providing the version 3389 number of the libxml module in use</li> 3390 <li>a number of optional features of libxml can now be excluded at 3391 configure time (FTP/HTTP/HTML/XPath/Debug)</li> 3392 </ul> 3393 3394 <h3>2.0.0beta: Mar 14 2000</h3> 3395 <ul> 3396 <li>This is a first Beta release of libxml version 2</li> 3397 <li>It's available only from<a href="ftp://xmlsoft.org/libxml2/">xmlsoft.org 3398 FTP</a>, it's packaged as libxml2-2.0.0beta and available as tar and 3399 RPMs</li> 3400 <li>This version is now the head in the Gnome CVS base, the old one is 3401 available under the tag LIB_XML_1_X</li> 3402 <li>This includes a very large set of changes. From a programmatic point 3403 of view applications should not have to be modified too much, check the 3404 <a href="upgrade.html">upgrade page</a></li> 3405 <li>Some interfaces may changes (especially a bit about encoding).</li> 3406 <li>the updates includes: 3407 <ul> 3408 <li>fix I18N support. ISO-Latin-x/UTF-8/UTF-16 (nearly) seems correctly 3409 handled now</li> 3410 <li>Better handling of entities, especially well-formedness checking 3411 and proper PEref extensions in external subsets</li> 3412 <li>DTD conditional sections</li> 3413 <li>Validation now correctly handle entities content</li> 3414 <li><a href="http://rpmfind.net/tools/gdome/messages/0039.html">change 3415 structures to accommodate DOM</a></li> 3416 </ul> 3417 </li> 3418 <li>Serious progress were made toward compliance, <a 3419 href="conf/result.html">here are the result of the test</a> against the 3420 OASIS testsuite (except the Japanese tests since I don't support that 3421 encoding yet). This URL is rebuilt every couple of hours using the CVS 3422 head version.</li> 3423 </ul> 3424 3425 <h3>1.8.7: Mar 6 2000</h3> 3426 <ul> 3427 <li>This is a bug fix release:</li> 3428 <li>It is possible to disable the ignorable blanks heuristic used by 3429 libxml-1.x, a new function xmlKeepBlanksDefault(0) will allow this. Note 3430 that for adherence to XML spec, this behaviour will be disabled by 3431 default in 2.x . The same function will allow to keep compatibility for 3432 old code.</li> 3433 <li>Blanks in <a> </a> constructs are not ignored anymore, 3434 avoiding heuristic is really the Right Way :-\</li> 3435 <li>The unchecked use of snprintf which was breaking libxml-1.8.6 3436 compilation on some platforms has been fixed</li> 3437 <li>nanoftp.c nanohttp.c: Fixed '#' and '?' stripping when processing 3438 URIs</li> 3439 </ul> 3440 3441 <h3>1.8.6: Jan 31 2000</h3> 3442 <ul> 3443 <li>added a nanoFTP transport module, debugged until the new version of <a 3444 href="http://rpmfind.net/linux/rpm2html/rpmfind.html">rpmfind</a> can use 3445 it without troubles</li> 3446 </ul> 3447 3448 <h3>1.8.5: Jan 21 2000</h3> 3449 <ul> 3450 <li>adding APIs to parse a well balanced chunk of XML (production <a 3451 href="http://www.w3.org/TR/REC-xml#NT-content">[43] content</a> of the 3452 XML spec)</li> 3453 <li>fixed a hideous bug in xmlGetProp pointed by Rune.Djurhuus (a] fast.no</li> 3454 <li>Jody Goldberg <jgoldberg (a] home.com> provided another patch trying 3455 to solve the zlib checks problems</li> 3456 <li>The current state in gnome CVS base is expected to ship as 1.8.5 with 3457 gnumeric soon</li> 3458 </ul> 3459 3460 <h3>1.8.4: Jan 13 2000</h3> 3461 <ul> 3462 <li>bug fixes, reintroduced xmlNewGlobalNs(), fixed xmlNewNs()</li> 3463 <li>all exit() call should have been removed from libxml</li> 3464 <li>fixed a problem with INCLUDE_WINSOCK on WIN32 platform</li> 3465 <li>added newDocFragment()</li> 3466 </ul> 3467 3468 <h3>1.8.3: Jan 5 2000</h3> 3469 <ul> 3470 <li>a Push interface for the XML and HTML parsers</li> 3471 <li>a shell-like interface to the document tree (try tester --shell :-)</li> 3472 <li>lots of bug fixes and improvement added over XMas holidays</li> 3473 <li>fixed the DTD parsing code to work with the xhtml DTD</li> 3474 <li>added xmlRemoveProp(), xmlRemoveID() and xmlRemoveRef()</li> 3475 <li>Fixed bugs in xmlNewNs()</li> 3476 <li>External entity loading code has been revamped, now it uses 3477 xmlLoadExternalEntity(), some fix on entities processing were added</li> 3478 <li>cleaned up WIN32 includes of socket stuff</li> 3479 </ul> 3480 3481 <h3>1.8.2: Dec 21 1999</h3> 3482 <ul> 3483 <li>I got another problem with includes and C++, I hope this issue is fixed 3484 for good this time</li> 3485 <li>Added a few tree modification functions: xmlReplaceNode, 3486 xmlAddPrevSibling, xmlAddNextSibling, xmlNodeSetName and 3487 xmlDocSetRootElement</li> 3488 <li>Tried to improve the HTML output with help from <a 3489 href="mailto:clahey (a] umich.edu">Chris Lahey</a></li> 3490 </ul> 3491 3492 <h3>1.8.1: Dec 18 1999</h3> 3493 <ul> 3494 <li>various patches to avoid troubles when using libxml with C++ compilers 3495 the "namespace" keyword and C escaping in include files</li> 3496 <li>a problem in one of the core macros IS_CHAR was corrected</li> 3497 <li>fixed a bug introduced in 1.8.0 breaking default namespace processing, 3498 and more specifically the Dia application</li> 3499 <li>fixed a posteriori validation (validation after parsing, or by using a 3500 Dtd not specified in the original document)</li> 3501 <li>fixed a bug in</li> 3502 </ul> 3503 3504 <h3>1.8.0: Dec 12 1999</h3> 3505 <ul> 3506 <li>cleanup, especially memory wise</li> 3507 <li>the parser should be more reliable, especially the HTML one, it should 3508 not crash, whatever the input !</li> 3509 <li>Integrated various patches, especially a speedup improvement for large 3510 dataset from <a href="mailto:cnygard (a] bellatlantic.net">Carl Nygard</a>, 3511 configure with --with-buffers to enable them.</li> 3512 <li>attribute normalization, oops should have been added long ago !</li> 3513 <li>attributes defaulted from DTDs should be available, xmlSetProp() now 3514 does entities escaping by default.</li> 3515 </ul> 3516 3517 <h3>1.7.4: Oct 25 1999</h3> 3518 <ul> 3519 <li>Lots of HTML improvement</li> 3520 <li>Fixed some errors when saving both XML and HTML</li> 3521 <li>More examples, the regression tests should now look clean</li> 3522 <li>Fixed a bug with contiguous charref</li> 3523 </ul> 3524 3525 <h3>1.7.3: Sep 29 1999</h3> 3526 <ul> 3527 <li>portability problems fixed</li> 3528 <li>snprintf was used unconditionally, leading to link problems on system 3529 were it's not available, fixed</li> 3530 </ul> 3531 3532 <h3>1.7.1: Sep 24 1999</h3> 3533 <ul> 3534 <li>The basic type for strings manipulated by libxml has been renamed in 3535 1.7.1 from <strong>CHAR</strong> to <strong>xmlChar</strong>. The reason 3536 is that CHAR was conflicting with a predefined type on Windows. However 3537 on non WIN32 environment, compatibility is provided by the way of a 3538 <strong>#define </strong>.</li> 3539 <li>Changed another error : the use of a structure field called errno, and 3540 leading to troubles on platforms where it's a macro</li> 3541 </ul> 3542 3543 <h3>1.7.0: Sep 23 1999</h3> 3544 <ul> 3545 <li>Added the ability to fetch remote DTD or parsed entities, see the <a 3546 href="html/libxml-nanohttp.html">nanohttp</a> module.</li> 3547 <li>Added an errno to report errors by another mean than a simple printf 3548 like callback</li> 3549 <li>Finished ID/IDREF support and checking when validation</li> 3550 <li>Serious memory leaks fixed (there is now a <a 3551 href="html/libxml-xmlmemory.html">memory wrapper</a> module)</li> 3552 <li>Improvement of <a href="http://www.w3.org/TR/xpath">XPath</a> 3553 implementation</li> 3554 <li>Added an HTML parser front-end</li> 3555 </ul> 3556 3557 <h2><a name="XML">XML</a></h2> 3558 3559 <p><a href="http://www.w3.org/TR/REC-xml">XML is a standard</a> for 3560 markup-based structured documents. Here is <a name="example">an example XML 3561 document</a>:</p> 3562 <pre><?xml version="1.0"?> 3563 <EXAMPLE prop1="gnome is great" prop2="&amp; linux too"> 3564 <head> 3565 <title>Welcome to Gnome</title> 3566 </head> 3567 <chapter> 3568 <title>The Linux adventure</title> 3569 <p>bla bla bla ...</p> 3570 <image href="linus.gif"/> 3571 <p>...</p> 3572 </chapter> 3573 </EXAMPLE></pre> 3574 3575 <p>The first line specifies that it is an XML document and gives useful 3576 information about its encoding. Then the rest of the document is a text 3577 format whose structure is specified by tags between brackets. <strong>Each 3578 tag opened has to be closed</strong>. XML is pedantic about this. However, if 3579 a tag is empty (no content), a single tag can serve as both the opening and 3580 closing tag if it ends with <code>/></code> rather than with 3581 <code>></code>. Note that, for example, the image tag has no content (just 3582 an attribute) and is closed by ending the tag with <code>/></code>.</p> 3583 3584 <p>XML can be applied successfully to a wide range of tasks, ranging from 3585 long term structured document maintenance (where it follows the steps of 3586 SGML) to simple data encoding mechanisms like configuration file formatting 3587 (glade), spreadsheets (gnumeric), or even shorter lived documents such as 3588 WebDAV where it is used to encode remote calls between a client and a 3589 server.</p> 3590 3591 <h2><a name="XSLT">XSLT</a></h2> 3592 3593 <p>Check <a href="http://xmlsoft.org/XSLT">the separate libxslt page</a></p> 3594 3595 <p><a href="http://www.w3.org/TR/xslt">XSL Transformations</a>, is a 3596 language for transforming XML documents into other XML documents (or 3597 HTML/textual output).</p> 3598 3599 <p>A separate library called libxslt is available implementing XSLT-1.0 for 3600 libxml2. This module "libxslt" too can be found in the Gnome SVN base.</p> 3601 3602 <p>You can check the progresses on the libxslt <a 3603 href="http://xmlsoft.org/XSLT/ChangeLog.html">Changelog</a>.</p> 3604 3605 <h2><a name="Python">Python and bindings</a></h2> 3606 3607 <p>There are a number of language bindings and wrappers available for 3608 libxml2, the list below is not exhaustive. Please contact the <a 3609 href="http://mail.gnome.org/mailman/listinfo/xml-bindings">xml-bindings (a] gnome.org</a> 3610 (<a href="http://mail.gnome.org/archives/xml-bindings/">archives</a>) in 3611 order to get updates to this list or to discuss the specific topic of libxml2 3612 or libxslt wrappers or bindings:</p> 3613 <ul> 3614 <li><a href="http://libxmlplusplus.sourceforge.net/">Libxml++</a> seems the 3615 most up-to-date C++ bindings for libxml2, check the <a 3616 href="http://libxmlplusplus.sourceforge.net/reference/html/hierarchy.html">documentation</a> 3617 and the <a 3618 href="http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/libxmlplusplus/libxml%2b%2b/examples/">examples</a>.</li> 3619 <li>There is another <a href="http://libgdome-cpp.berlios.de/">C++ wrapper 3620 based on the gdome2 bindings</a> maintained by Tobias Peters.</li> 3621 <li>and a third C++ wrapper by Peter Jones <pjones (a] pmade.org> 3622 <p>Website: <a 3623 href="http://pmade.org/pjones/software/xmlwrapp/">http://pmade.org/pjones/software/xmlwrapp/</a></p> 3624 </li> 3625 <li>XML::LibXML <a href="http://cpan.uwinnipeg.ca/dist/XML-LibXML">Perl 3626 bindings</a> are available on CPAN, as well as XML::LibXSLT 3627 <a href="http://cpan.uwinnipeg.ca/dist/XML-LibXSLT">Perl libxslt 3628 bindings</a>.</li> 3629 <li>If you're interested into scripting XML processing, have a look at <a 3630 href="http://xsh.sourceforge.net/">XSH</a> an XML editing shell based on 3631 Libxml2 Perl bindings.</li> 3632 <li><a href="mailto:dkuhlman (a] cutter.rexx.com">Dave Kuhlman</a> provides an 3633 earlier version of the libxml/libxslt <a 3634 href="http://www.rexx.com/~dkuhlman">wrappers for Python</a>.</li> 3635 <li>Gopal.V and Peter Minten develop <a 3636 href="http://savannah.gnu.org/projects/libxmlsharp">libxml#</a>, a set of 3637 C# libxml2 bindings.</li> 3638 <li>Petr Kozelka provides <a 3639 href="http://sourceforge.net/projects/libxml2-pas">Pascal units to glue 3640 libxml2</a> with Kylix, Delphi and other Pascal compilers.</li> 3641 <li>Uwe Fechner also provides <a 3642 href="http://sourceforge.net/projects/idom2-pas/">idom2</a>, a DOM2 3643 implementation for Kylix2/D5/D6 from Borland.</li> 3644 <li>There is <a href="http://libxml.rubyforge.org/">bindings for Ruby</a> 3645 and libxml2 bindings are also available in Ruby through the <a 3646 href="http://libgdome-ruby.berlios.de/">libgdome-ruby</a> module 3647 maintained by Tobias Peters.</li> 3648 <li>Steve Ball and contributors maintains <a 3649 href="http://tclxml.sourceforge.net/">libxml2 and libxslt bindings for 3650 Tcl</a>.</li> 3651 <li>libxml2 and libxslt are the default XML libraries for PHP5.</li> 3652 <li><a href="http://savannah.gnu.org/projects/classpathx/">LibxmlJ</a> is 3653 an effort to create a 100% JAXP-compatible Java wrapper for libxml2 and 3654 libxslt as part of GNU ClasspathX project.</li> 3655 <li>Patrick McPhee provides Rexx bindings fof libxml2 and libxslt, look for 3656 <a href="http://www.interlog.com/~ptjm/software.html">RexxXML</a>.</li> 3657 <li><a 3658 href="http://www.satimage.fr/software/en/xml_suite.html">Satimage</a> 3659 provides <a 3660 href="http://www.satimage.fr/software/en/downloads_osaxen.html">XMLLib 3661 osax</a>. This is an osax for Mac OS X with a set of commands to 3662 implement in AppleScript the XML DOM, XPATH and XSLT. Also includes 3663 commands for Property-lists (Apple's fast lookup table XML format.)</li> 3664 <li>Francesco Montorsi developped <a 3665 href="https://sourceforge.net/project/showfiles.php?group_id=51305&package_id=45182">wxXml2</a> 3666 wrappers that interface libxml2, allowing wxWidgets applications to 3667 load/save/edit XML instances.</li> 3668 </ul> 3669 3670 <p>The distribution includes a set of Python bindings, which are guaranteed 3671 to be maintained as part of the library in the future, though the Python 3672 interface have not yet reached the completeness of the C API.</p> 3673 3674 <p>Note that some of the Python purist dislike the default set of Python 3675 bindings, rather than complaining I suggest they have a look at <a 3676 href="http://lxml.de/">lxml the more pythonic bindings for libxml2 3677 and libxslt</a> and <a 3678 href="http://lxml.de/mailinglist/">check the mailing-list</a>.</p> 3679 3680 <p><a href="mailto:stephane.bidoul (a] softwareag.com">Stphane Bidoul</a> 3681 maintains <a href="http://users.skynet.be/sbi/libxml-python/">a Windows port 3682 of the Python bindings</a>.</p> 3683 3684 <p>Note to people interested in building bindings, the API is formalized as 3685 <a href="libxml2-api.xml">an XML API description file</a> which allows to 3686 automate a large part of the Python bindings, this includes function 3687 descriptions, enums, structures, typedefs, etc... The Python script used to 3688 build the bindings is python/generator.py in the source distribution.</p> 3689 3690 <p>To install the Python bindings there are 2 options:</p> 3691 <ul> 3692 <li>If you use an RPM based distribution, simply install the <a 3693 href="http://rpmfind.net/linux/rpm2html/search.php?query=libxml2-python">libxml2-python 3694 RPM</a> (and if needed the <a 3695 href="http://rpmfind.net/linux/rpm2html/search.php?query=libxslt-python">libxslt-python 3696 RPM</a>).</li> 3697 <li>Otherwise use the <a href="ftp://xmlsoft.org/libxml2/python/">libxml2-python 3698 module distribution</a> corresponding to your installed version of 3699 libxml2 and libxslt. Note that to install it you will need both libxml2 3700 and libxslt installed and run "python setup.py build install" in the 3701 module tree.</li> 3702 </ul> 3703 3704 <p>The distribution includes a set of examples and regression tests for the 3705 python bindings in the <code>python/tests</code> directory. Here are some 3706 excerpts from those tests:</p> 3707 3708 <h3>tst.py:</h3> 3709 3710 <p>This is a basic test of the file interface and DOM navigation:</p> 3711 <pre>import libxml2, sys 3712 3713 doc = libxml2.parseFile("tst.xml") 3714 if doc.name != "tst.xml": 3715 print "doc.name failed" 3716 sys.exit(1) 3717 root = doc.children 3718 if root.name != "doc": 3719 print "root.name failed" 3720 sys.exit(1) 3721 child = root.children 3722 if child.name != "foo": 3723 print "child.name failed" 3724 sys.exit(1) 3725 doc.freeDoc()</pre> 3726 3727 <p>The Python module is called libxml2; parseFile is the equivalent of 3728 xmlParseFile (most of the bindings are automatically generated, and the xml 3729 prefix is removed and the casing convention are kept). All node seen at the 3730 binding level share the same subset of accessors:</p> 3731 <ul> 3732 <li><code>name</code> : returns the node name</li> 3733 <li><code>type</code> : returns a string indicating the node type</li> 3734 <li><code>content</code> : returns the content of the node, it is based on 3735 xmlNodeGetContent() and hence is recursive.</li> 3736 <li><code>parent</code> , <code>children</code>, <code>last</code>, 3737 <code>next</code>, <code>prev</code>, <code>doc</code>, 3738 <code>properties</code>: pointing to the associated element in the tree, 3739 those may return None in case no such link exists.</li> 3740 </ul> 3741 3742 <p>Also note the need to explicitly deallocate documents with freeDoc() . 3743 Reference counting for libxml2 trees would need quite a lot of work to 3744 function properly, and rather than risk memory leaks if not implemented 3745 correctly it sounds safer to have an explicit function to free a tree. The 3746 wrapper python objects like doc, root or child are them automatically garbage 3747 collected.</p> 3748 3749 <h3>validate.py:</h3> 3750 3751 <p>This test check the validation interfaces and redirection of error 3752 messages:</p> 3753 <pre>import libxml2 3754 3755 #deactivate error messages from the validation 3756 def noerr(ctx, str): 3757 pass 3758 3759 libxml2.registerErrorHandler(noerr, None) 3760 3761 ctxt = libxml2.createFileParserCtxt("invalid.xml") 3762 ctxt.validate(1) 3763 ctxt.parseDocument() 3764 doc = ctxt.doc() 3765 valid = ctxt.isValid() 3766 doc.freeDoc() 3767 if valid != 0: 3768 print "validity check failed"</pre> 3769 3770 <p>The first thing to notice is the call to registerErrorHandler(), it 3771 defines a new error handler global to the library. It is used to avoid seeing 3772 the error messages when trying to validate the invalid document.</p> 3773 3774 <p>The main interest of that test is the creation of a parser context with 3775 createFileParserCtxt() and how the behaviour can be changed before calling 3776 parseDocument() . Similarly the information resulting from the parsing phase 3777 is also available using context methods.</p> 3778 3779 <p>Contexts like nodes are defined as class and the libxml2 wrappers maps the 3780 C function interfaces in terms of objects method as much as possible. The 3781 best to get a complete view of what methods are supported is to look at the 3782 libxml2.py module containing all the wrappers.</p> 3783 3784 <h3>push.py:</h3> 3785 3786 <p>This test show how to activate the push parser interface:</p> 3787 <pre>import libxml2 3788 3789 ctxt = libxml2.createPushParser(None, "<foo", 4, "test.xml") 3790 ctxt.parseChunk("/>", 2, 1) 3791 doc = ctxt.doc() 3792 3793 doc.freeDoc()</pre> 3794 3795 <p>The context is created with a special call based on the 3796 xmlCreatePushParser() from the C library. The first argument is an optional 3797 SAX callback object, then the initial set of data, the length and the name of 3798 the resource in case URI-References need to be computed by the parser.</p> 3799 3800 <p>Then the data are pushed using the parseChunk() method, the last call 3801 setting the third argument terminate to 1.</p> 3802 3803 <h3>pushSAX.py:</h3> 3804 3805 <p>this test show the use of the event based parsing interfaces. In this case 3806 the parser does not build a document, but provides callback information as 3807 the parser makes progresses analyzing the data being provided:</p> 3808 <pre>import libxml2 3809 log = "" 3810 3811 class callback: 3812 def startDocument(self): 3813 global log 3814 log = log + "startDocument:" 3815 3816 def endDocument(self): 3817 global log 3818 log = log + "endDocument:" 3819 3820 def startElement(self, tag, attrs): 3821 global log 3822 log = log + "startElement %s %s:" % (tag, attrs) 3823 3824 def endElement(self, tag): 3825 global log 3826 log = log + "endElement %s:" % (tag) 3827 3828 def characters(self, data): 3829 global log 3830 log = log + "characters: %s:" % (data) 3831 3832 def warning(self, msg): 3833 global log 3834 log = log + "warning: %s:" % (msg) 3835 3836 def error(self, msg): 3837 global log 3838 log = log + "error: %s:" % (msg) 3839 3840 def fatalError(self, msg): 3841 global log 3842 log = log + "fatalError: %s:" % (msg) 3843 3844 handler = callback() 3845 3846 ctxt = libxml2.createPushParser(handler, "<foo", 4, "test.xml") 3847 chunk = " url='tst'>b" 3848 ctxt.parseChunk(chunk, len(chunk), 0) 3849 chunk = "ar</foo>" 3850 ctxt.parseChunk(chunk, len(chunk), 1) 3851 3852 reference = "startDocument:startElement foo {'url': 'tst'}:" + \ 3853 "characters: bar:endElement foo:endDocument:" 3854 if log != reference: 3855 print "Error got: %s" % log 3856 print "Expected: %s" % reference</pre> 3857 3858 <p>The key object in that test is the handler, it provides a number of entry 3859 points which can be called by the parser as it makes progresses to indicate 3860 the information set obtained. The full set of callback is larger than what 3861 the callback class in that specific example implements (see the SAX 3862 definition for a complete list). The wrapper will only call those supplied by 3863 the object when activated. The startElement receives the names of the element 3864 and a dictionary containing the attributes carried by this element.</p> 3865 3866 <p>Also note that the reference string generated from the callback shows a 3867 single character call even though the string "bar" is passed to the parser 3868 from 2 different call to parseChunk()</p> 3869 3870 <h3>xpath.py:</h3> 3871 3872 <p>This is a basic test of XPath wrappers support</p> 3873 <pre>import libxml2 3874 3875 doc = libxml2.parseFile("tst.xml") 3876 ctxt = doc.xpathNewContext() 3877 res = ctxt.xpathEval("//*") 3878 if len(res) != 2: 3879 print "xpath query: wrong node set size" 3880 sys.exit(1) 3881 if res[0].name != "doc" or res[1].name != "foo": 3882 print "xpath query: wrong node set value" 3883 sys.exit(1) 3884 doc.freeDoc() 3885 ctxt.xpathFreeContext()</pre> 3886 3887 <p>This test parses a file, then create an XPath context to evaluate XPath 3888 expression on it. The xpathEval() method execute an XPath query and returns 3889 the result mapped in a Python way. String and numbers are natively converted, 3890 and node sets are returned as a tuple of libxml2 Python nodes wrappers. Like 3891 the document, the XPath context need to be freed explicitly, also not that 3892 the result of the XPath query may point back to the document tree and hence 3893 the document must be freed after the result of the query is used.</p> 3894 3895 <h3>xpathext.py:</h3> 3896 3897 <p>This test shows how to extend the XPath engine with functions written in 3898 python:</p> 3899 <pre>import libxml2 3900 3901 def foo(ctx, x): 3902 return x + 1 3903 3904 doc = libxml2.parseFile("tst.xml") 3905 ctxt = doc.xpathNewContext() 3906 libxml2.registerXPathFunction(ctxt._o, "foo", None, foo) 3907 res = ctxt.xpathEval("foo(1)") 3908 if res != 2: 3909 print "xpath extension failure" 3910 doc.freeDoc() 3911 ctxt.xpathFreeContext()</pre> 3912 3913 <p>Note how the extension function is registered with the context (but that 3914 part is not yet finalized, this may change slightly in the future).</p> 3915 3916 <h3>tstxpath.py:</h3> 3917 3918 <p>This test is similar to the previous one but shows how the extension 3919 function can access the XPath evaluation context:</p> 3920 <pre>def foo(ctx, x): 3921 global called 3922 3923 # 3924 # test that access to the XPath evaluation contexts 3925 # 3926 pctxt = libxml2.xpathParserContext(_obj=ctx) 3927 ctxt = pctxt.context() 3928 called = ctxt.function() 3929 return x + 1</pre> 3930 3931 <p>All the interfaces around the XPath parser(or rather evaluation) context 3932 are not finalized, but it should be sufficient to do contextual work at the 3933 evaluation point.</p> 3934 3935 <h3>Memory debugging:</h3> 3936 3937 <p>last but not least, all tests starts with the following prologue:</p> 3938 <pre>#memory debug specific 3939 libxml2.debugMemory(1)</pre> 3940 3941 <p>and ends with the following epilogue:</p> 3942 <pre>#memory debug specific 3943 libxml2.cleanupParser() 3944 if libxml2.debugMemory(1) == 0: 3945 print "OK" 3946 else: 3947 print "Memory leak %d bytes" % (libxml2.debugMemory(1)) 3948 libxml2.dumpMemory()</pre> 3949 3950 <p>Those activate the memory debugging interface of libxml2 where all 3951 allocated block in the library are tracked. The prologue then cleans up the 3952 library state and checks that all allocated memory has been freed. If not it 3953 calls dumpMemory() which saves that list in a <code>.memdump</code> file.</p> 3954 3955 <h2><a name="architecture">libxml2 architecture</a></h2> 3956 3957 <p>Libxml2 is made of multiple components; some of them are optional, and 3958 most of the block interfaces are public. The main components are:</p> 3959 <ul> 3960 <li>an Input/Output layer</li> 3961 <li>FTP and HTTP client layers (optional)</li> 3962 <li>an Internationalization layer managing the encodings support</li> 3963 <li>a URI module</li> 3964 <li>the XML parser and its basic SAX interface</li> 3965 <li>an HTML parser using the same SAX interface (optional)</li> 3966 <li>a SAX tree module to build an in-memory DOM representation</li> 3967 <li>a tree module to manipulate the DOM representation</li> 3968 <li>a validation module using the DOM representation (optional)</li> 3969 <li>an XPath module for global lookup in a DOM representation 3970 (optional)</li> 3971 <li>a debug module (optional)</li> 3972 </ul> 3973 3974 <p>Graphically this gives the following:</p> 3975 3976 <p><img src="libxml.gif" alt="a graphical view of the various"></p> 3977 3978 <p></p> 3979 3980 <h2><a name="tree">The tree output</a></h2> 3981 3982 <p>The parser returns a tree built during the document analysis. The value 3983 returned is an <strong>xmlDocPtr</strong> (i.e., a pointer to an 3984 <strong>xmlDoc</strong> structure). This structure contains information such 3985 as the file name, the document type, and a <strong>children</strong> pointer 3986 which is the root of the document (or more exactly the first child under the 3987 root which is the document). The tree is made of <strong>xmlNode</strong>s, 3988 chained in double-linked lists of siblings and with a children<->parent 3989 relationship. An xmlNode can also carry properties (a chain of xmlAttr 3990 structures). An attribute may have a value which is a list of TEXT or 3991 ENTITY_REF nodes.</p> 3992 3993 <p>Here is an example (erroneous with respect to the XML spec since there 3994 should be only one ELEMENT under the root):</p> 3995 3996 <p><img src="structure.gif" alt=" structure.gif "></p> 3997 3998 <p>In the source package there is a small program (not installed by default) 3999 called <strong>xmllint</strong> which parses XML files given as argument and 4000 prints them back as parsed. This is useful for detecting errors both in XML 4001 code and in the XML parser itself. It has an option <strong>--debug</strong> 4002 which prints the actual in-memory structure of the document; here is the 4003 result with the <a href="#example">example</a> given before:</p> 4004 <pre>DOCUMENT 4005 version=1.0 4006 standalone=true 4007 ELEMENT EXAMPLE 4008 ATTRIBUTE prop1 4009 TEXT 4010 content=gnome is great 4011 ATTRIBUTE prop2 4012 ENTITY_REF 4013 TEXT 4014 content= linux too 4015 ELEMENT head 4016 ELEMENT title 4017 TEXT 4018 content=Welcome to Gnome 4019 ELEMENT chapter 4020 ELEMENT title 4021 TEXT 4022 content=The Linux adventure 4023 ELEMENT p 4024 TEXT 4025 content=bla bla bla ... 4026 ELEMENT image 4027 ATTRIBUTE href 4028 TEXT 4029 content=linus.gif 4030 ELEMENT p 4031 TEXT 4032 content=...</pre> 4033 4034 <p>This should be useful for learning the internal representation model.</p> 4035 4036 <h2><a name="interface">The SAX interface</a></h2> 4037 4038 <p>Sometimes the DOM tree output is just too large to fit reasonably into 4039 memory. In that case (and if you don't expect to save back the XML document 4040 loaded using libxml), it's better to use the SAX interface of libxml. SAX is 4041 a <strong>callback-based interface</strong> to the parser. Before parsing, 4042 the application layer registers a customized set of callbacks which are 4043 called by the library as it progresses through the XML input.</p> 4044 4045 <p>To get more detailed step-by-step guidance on using the SAX interface of 4046 libxml, see the <a 4047 href="http://www.jamesh.id.au/articles/libxml-sax/libxml-sax.html">nice 4048 documentation</a>.written by <a href="mailto:james (a] daa.com.au">James 4049 Henstridge</a>.</p> 4050 4051 <p>You can debug the SAX behaviour by using the <strong>testSAX</strong> 4052 program located in the gnome-xml module (it's usually not shipped in the 4053 binary packages of libxml, but you can find it in the tar source 4054 distribution). Here is the sequence of callbacks that would be reported by 4055 testSAX when parsing the example XML document shown earlier:</p> 4056 <pre>SAX.setDocumentLocator() 4057 SAX.startDocument() 4058 SAX.getEntity(amp) 4059 SAX.startElement(EXAMPLE, prop1='gnome is great', prop2='&amp; linux too') 4060 SAX.characters( , 3) 4061 SAX.startElement(head) 4062 SAX.characters( , 4) 4063 SAX.startElement(title) 4064 SAX.characters(Welcome to Gnome, 16) 4065 SAX.endElement(title) 4066 SAX.characters( , 3) 4067 SAX.endElement(head) 4068 SAX.characters( , 3) 4069 SAX.startElement(chapter) 4070 SAX.characters( , 4) 4071 SAX.startElement(title) 4072 SAX.characters(The Linux adventure, 19) 4073 SAX.endElement(title) 4074 SAX.characters( , 4) 4075 SAX.startElement(p) 4076 SAX.characters(bla bla bla ..., 15) 4077 SAX.endElement(p) 4078 SAX.characters( , 4) 4079 SAX.startElement(image, href='linus.gif') 4080 SAX.endElement(image) 4081 SAX.characters( , 4) 4082 SAX.startElement(p) 4083 SAX.characters(..., 3) 4084 SAX.endElement(p) 4085 SAX.characters( , 3) 4086 SAX.endElement(chapter) 4087 SAX.characters( , 1) 4088 SAX.endElement(EXAMPLE) 4089 SAX.endDocument()</pre> 4090 4091 <p>Most of the other interfaces of libxml2 are based on the DOM tree-building 4092 facility, so nearly everything up to the end of this document presupposes the 4093 use of the standard DOM tree build. Note that the DOM tree itself is built by 4094 a set of registered default callbacks, without internal specific 4095 interface.</p> 4096 4097 <h2><a name="Validation">Validation & DTDs</a></h2> 4098 4099 <p>Table of Content:</p> 4100 <ol> 4101 <li><a href="#General5">General overview</a></li> 4102 <li><a href="#definition">The definition</a></li> 4103 <li><a href="#Simple">Simple rules</a> 4104 <ol> 4105 <li><a href="#reference">How to reference a DTD from a document</a></li> 4106 <li><a href="#Declaring">Declaring elements</a></li> 4107 <li><a href="#Declaring1">Declaring attributes</a></li> 4108 </ol> 4109 </li> 4110 <li><a href="#Some">Some examples</a></li> 4111 <li><a href="#validate">How to validate</a></li> 4112 <li><a href="#Other">Other resources</a></li> 4113 </ol> 4114 4115 <h3><a name="General5">General overview</a></h3> 4116 4117 <p>Well what is validation and what is a DTD ?</p> 4118 4119 <p>DTD is the acronym for Document Type Definition. This is a description of 4120 the content for a family of XML files. This is part of the XML 1.0 4121 specification, and allows one to describe and verify that a given document 4122 instance conforms to the set of rules detailing its structure and content.</p> 4123 4124 <p>Validation is the process of checking a document against a DTD (more 4125 generally against a set of construction rules).</p> 4126 4127 <p>The validation process and building DTDs are the two most difficult parts 4128 of the XML life cycle. Briefly a DTD defines all the possible elements to be 4129 found within your document, what is the formal shape of your document tree 4130 (by defining the allowed content of an element; either text, a regular 4131 expression for the allowed list of children, or mixed content i.e. both text 4132 and children). The DTD also defines the valid attributes for all elements and 4133 the types of those attributes.</p> 4134 4135 <h3><a name="definition1">The definition</a></h3> 4136 4137 <p>The <a href="http://www.w3.org/TR/REC-xml">W3C XML Recommendation</a> (<a 4138 href="http://www.xml.com/axml/axml.html">Tim Bray's annotated version of 4139 Rev1</a>):</p> 4140 <ul> 4141 <li><a href="http://www.w3.org/TR/REC-xml#elemdecls">Declaring 4142 elements</a></li> 4143 <li><a href="http://www.w3.org/TR/REC-xml#attdecls">Declaring 4144 attributes</a></li> 4145 </ul> 4146 4147 <p>(unfortunately) all this is inherited from the SGML world, the syntax is 4148 ancient...</p> 4149 4150 <h3><a name="Simple1">Simple rules</a></h3> 4151 4152 <p>Writing DTDs can be done in many ways. The rules to build them if you need 4153 something permanent or something which can evolve over time can be radically 4154 different. Really complex DTDs like DocBook ones are flexible but quite 4155 harder to design. I will just focus on DTDs for a formats with a fixed simple 4156 structure. It is just a set of basic rules, and definitely not exhaustive nor 4157 usable for complex DTD design.</p> 4158 4159 <h4><a name="reference1">How to reference a DTD from a document</a>:</h4> 4160 4161 <p>Assuming the top element of the document is <code>spec</code> and the dtd 4162 is placed in the file <code>mydtd</code> in the subdirectory 4163 <code>dtds</code> of the directory from where the document were loaded:</p> 4164 4165 <p><code><!DOCTYPE spec SYSTEM "dtds/mydtd"></code></p> 4166 4167 <p>Notes:</p> 4168 <ul> 4169 <li>The system string is actually an URI-Reference (as defined in <a 4170 href="http://www.ietf.org/rfc/rfc2396.txt">RFC 2396</a>) so you can use a 4171 full URL string indicating the location of your DTD on the Web. This is a 4172 really good thing to do if you want others to validate your document.</li> 4173 <li>It is also possible to associate a <code>PUBLIC</code> identifier (a 4174 magic string) so that the DTD is looked up in catalogs on the client side 4175 without having to locate it on the web.</li> 4176 <li>A DTD contains a set of element and attribute declarations, but they 4177 don't define what the root of the document should be. This is explicitly 4178 told to the parser/validator as the first element of the 4179 <code>DOCTYPE</code> declaration.</li> 4180 </ul> 4181 4182 <h4><a name="Declaring2">Declaring elements</a>:</h4> 4183 4184 <p>The following declares an element <code>spec</code>:</p> 4185 4186 <p><code><!ELEMENT spec (front, body, back?)></code></p> 4187 4188 <p>It also expresses that the spec element contains one <code>front</code>, 4189 one <code>body</code> and one optional <code>back</code> children elements in 4190 this order. The declaration of one element of the structure and its content 4191 are done in a single declaration. Similarly the following declares 4192 <code>div1</code> elements:</p> 4193 4194 <p><code><!ELEMENT div1 (head, (p | list | note)*, div2?)></code></p> 4195 4196 <p>which means div1 contains one <code>head</code> then a series of optional 4197 <code>p</code>, <code>list</code>s and <code>note</code>s and then an 4198 optional <code>div2</code>. And last but not least an element can contain 4199 text:</p> 4200 4201 <p><code><!ELEMENT b (#PCDATA)></code></p> 4202 4203 <p><code>b</code> contains text or being of mixed content (text and elements 4204 in no particular order):</p> 4205 4206 <p><code><!ELEMENT p (#PCDATA|a|ul|b|i|em)*></code></p> 4207 4208 <p><code>p </code>can contain text or <code>a</code>, <code>ul</code>, 4209 <code>b</code>, <code>i </code>or <code>em</code> elements in no particular 4210 order.</p> 4211 4212 <h4><a name="Declaring1">Declaring attributes</a>:</h4> 4213 4214 <p>Again the attributes declaration includes their content definition:</p> 4215 4216 <p><code><!ATTLIST termdef name CDATA #IMPLIED></code></p> 4217 4218 <p>means that the element <code>termdef</code> can have a <code>name</code> 4219 attribute containing text (<code>CDATA</code>) and which is optional 4220 (<code>#IMPLIED</code>). The attribute value can also be defined within a 4221 set:</p> 4222 4223 <p><code><!ATTLIST list type (bullets|ordered|glossary) 4224 "ordered"></code></p> 4225 4226 <p>means <code>list</code> element have a <code>type</code> attribute with 3 4227 allowed values "bullets", "ordered" or "glossary" and which default to 4228 "ordered" if the attribute is not explicitly specified.</p> 4229 4230 <p>The content type of an attribute can be text (<code>CDATA</code>), 4231 anchor/reference/references 4232 (<code>ID</code>/<code>IDREF</code>/<code>IDREFS</code>), entity(ies) 4233 (<code>ENTITY</code>/<code>ENTITIES</code>) or name(s) 4234 (<code>NMTOKEN</code>/<code>NMTOKENS</code>). The following defines that a 4235 <code>chapter</code> element can have an optional <code>id</code> attribute 4236 of type <code>ID</code>, usable for reference from attribute of type 4237 IDREF:</p> 4238 4239 <p><code><!ATTLIST chapter id ID #IMPLIED></code></p> 4240 4241 <p>The last value of an attribute definition can be <code>#REQUIRED 4242 </code>meaning that the attribute has to be given, <code>#IMPLIED</code> 4243 meaning that it is optional, or the default value (possibly prefixed by 4244 <code>#FIXED</code> if it is the only allowed).</p> 4245 4246 <p>Notes:</p> 4247 <ul> 4248 <li>Usually the attributes pertaining to a given element are declared in a 4249 single expression, but it is just a convention adopted by a lot of DTD 4250 writers: 4251 <pre><!ATTLIST termdef 4252 id ID #REQUIRED 4253 name CDATA #IMPLIED></pre> 4254 <p>The previous construct defines both <code>id</code> and 4255 <code>name</code> attributes for the element <code>termdef</code>.</p> 4256 </li> 4257 </ul> 4258 4259 <h3><a name="Some1">Some examples</a></h3> 4260 4261 <p>The directory <code>test/valid/dtds/</code> in the libxml2 distribution 4262 contains some complex DTD examples. The example in the file 4263 <code>test/valid/dia.xml</code> shows an XML file where the simple DTD is 4264 directly included within the document.</p> 4265 4266 <h3><a name="validate1">How to validate</a></h3> 4267 4268 <p>The simplest way is to use the xmllint program included with libxml. The 4269 <code>--valid</code> option turns-on validation of the files given as input. 4270 For example the following validates a copy of the first revision of the XML 4271 1.0 specification:</p> 4272 4273 <p><code>xmllint --valid --noout test/valid/REC-xml-19980210.xml</code></p> 4274 4275 <p>the -- noout is used to disable output of the resulting tree.</p> 4276 4277 <p>The <code>--dtdvalid dtd</code> allows validation of the document(s) 4278 against a given DTD.</p> 4279 4280 <p>Libxml2 exports an API to handle DTDs and validation, check the <a 4281 href="http://xmlsoft.org/html/libxml-valid.html">associated 4282 description</a>.</p> 4283 4284 <h3><a name="Other1">Other resources</a></h3> 4285 4286 <p>DTDs are as old as SGML. So there may be a number of examples on-line, I 4287 will just list one for now, others pointers welcome:</p> 4288 <ul> 4289 <li><a href="http://www.xml101.com:8081/dtd/">XML-101 DTD</a></li> 4290 </ul> 4291 4292 <p>I suggest looking at the examples found under test/valid/dtd and any of 4293 the large number of books available on XML. The dia example in test/valid 4294 should be both simple and complete enough to allow you to build your own.</p> 4295 4296 <p></p> 4297 4298 <h2><a name="Memory">Memory Management</a></h2> 4299 4300 <p>Table of Content:</p> 4301 <ol> 4302 <li><a href="#General3">General overview</a></li> 4303 <li><a href="#setting">Setting libxml2 set of memory routines</a></li> 4304 <li><a href="#cleanup">Cleaning up after using the library</a></li> 4305 <li><a href="#Debugging">Debugging routines</a></li> 4306 <li><a href="#General4">General memory requirements</a></li> 4307 <li><a href="#Compacting">Returning memory to the kernel</a></li> 4308 </ol> 4309 4310 <h3><a name="General3">General overview</a></h3> 4311 4312 <p>The module <code><a 4313 href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlmemory.h</a></code> 4314 provides the interfaces to the libxml2 memory system:</p> 4315 <ul> 4316 <li>libxml2 does not use the libc memory allocator directly but xmlFree(), 4317 xmlMalloc() and xmlRealloc()</li> 4318 <li>those routines can be reallocated to a specific set of routine, by 4319 default the libc ones i.e. free(), malloc() and realloc()</li> 4320 <li>the xmlmemory.c module includes a set of debugging routine</li> 4321 </ul> 4322 4323 <h3><a name="setting">Setting libxml2 set of memory routines</a></h3> 4324 4325 <p>It is sometimes useful to not use the default memory allocator, either for 4326 debugging, analysis or to implement a specific behaviour on memory management 4327 (like on embedded systems). Two function calls are available to do so:</p> 4328 <ul> 4329 <li><a href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlMemGet 4330 ()</a> which return the current set of functions in use by the parser</li> 4331 <li><a 4332 href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlMemSetup()</a> 4333 which allow to set up a new set of memory allocation functions</li> 4334 </ul> 4335 4336 <p>Of course a call to xmlMemSetup() should probably be done before calling 4337 any other libxml2 routines (unless you are sure your allocations routines are 4338 compatibles).</p> 4339 4340 <h3><a name="cleanup">Cleaning up after using the library</a></h3> 4341 4342 <p>Libxml2 is not stateless, there is a few set of memory structures needing 4343 allocation before the parser is fully functional (some encoding structures 4344 for example). This also mean that once parsing is finished there is a tiny 4345 amount of memory (a few hundred bytes) which can be recollected if you don't 4346 reuse the library or any document built with it:</p> 4347 <ul> 4348 <li><a href="http://xmlsoft.org/html/libxml-parser.html">xmlCleanupParser 4349 ()</a> is a centralized routine to free the library state and data. Note 4350 that it won't deallocate any produced tree if any (use the xmlFreeDoc() 4351 and related routines for this). This should be called only when the library 4352 is not used anymore.</li> 4353 <li><a href="http://xmlsoft.org/html/libxml-parser.html">xmlInitParser 4354 ()</a> is the dual routine allowing to preallocate the parsing state 4355 which can be useful for example to avoid initialization reentrancy 4356 problems when using libxml2 in multithreaded applications</li> 4357 </ul> 4358 4359 <p>Generally xmlCleanupParser() is safe assuming no parsing is ongoing and 4360 no document is still being used, if needed the state will be rebuild at the 4361 next invocation of parser routines (or by xmlInitParser()), but be careful 4362 of the consequences in multithreaded applications.</p> 4363 4364 <h3><a name="Debugging">Debugging routines</a></h3> 4365 4366 <p>When configured using --with-mem-debug flag (off by default), libxml2 uses 4367 a set of memory allocation debugging routines keeping track of all allocated 4368 blocks and the location in the code where the routine was called. A couple of 4369 other debugging routines allow to dump the memory allocated infos to a file 4370 or call a specific routine when a given block number is allocated:</p> 4371 <ul> 4372 <li><a 4373 href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlMallocLoc()</a> 4374 <a 4375 href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlReallocLoc()</a> 4376 and <a 4377 href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlMemStrdupLoc()</a> 4378 are the memory debugging replacement allocation routines</li> 4379 <li><a href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlMemoryDump 4380 ()</a> dumps all the information about the allocated memory block lefts 4381 in the <code>.memdump</code> file</li> 4382 </ul> 4383 4384 <p>When developing libxml2 memory debug is enabled, the tests programs call 4385 xmlMemoryDump () and the "make test" regression tests will check for any 4386 memory leak during the full regression test sequence, this helps a lot 4387 ensuring that libxml2 does not leak memory and bullet proof memory 4388 allocations use (some libc implementations are known to be far too permissive 4389 resulting in major portability problems!).</p> 4390 4391 <p>If the .memdump reports a leak, it displays the allocation function and 4392 also tries to give some information about the content and structure of the 4393 allocated blocks left. This is sufficient in most cases to find the culprit, 4394 but not always. Assuming the allocation problem is reproducible, it is 4395 possible to find more easily:</p> 4396 <ol> 4397 <li>write down the block number xxxx not allocated</li> 4398 <li>export the environment variable XML_MEM_BREAKPOINT=xxxx , the easiest 4399 when using GDB is to simply give the command 4400 <p><code>set environment XML_MEM_BREAKPOINT xxxx</code></p> 4401 <p>before running the program.</p> 4402 </li> 4403 <li>run the program under a debugger and set a breakpoint on 4404 xmlMallocBreakpoint() a specific function called when this precise block 4405 is allocated</li> 4406 <li>when the breakpoint is reached you can then do a fine analysis of the 4407 allocation an step to see the condition resulting in the missing 4408 deallocation.</li> 4409 </ol> 4410 4411 <p>I used to use a commercial tool to debug libxml2 memory problems but after 4412 noticing that it was not detecting memory leaks that simple mechanism was 4413 used and proved extremely efficient until now. Lately I have also used <a 4414 href="http://developer.kde.org/~sewardj/">valgrind</a> with quite some 4415 success, it is tied to the i386 architecture since it works by emulating the 4416 processor and instruction set, it is slow but extremely efficient, i.e. it 4417 spot memory usage errors in a very precise way.</p> 4418 4419 <h3><a name="General4">General memory requirements</a></h3> 4420 4421 <p>How much libxml2 memory require ? It's hard to tell in average it depends 4422 of a number of things:</p> 4423 <ul> 4424 <li>the parser itself should work in a fixed amount of memory, except for 4425 information maintained about the stacks of names and entities locations. 4426 The I/O and encoding handlers will probably account for a few KBytes. 4427 This is true for both the XML and HTML parser (though the HTML parser 4428 need more state).</li> 4429 <li>If you are generating the DOM tree then memory requirements will grow 4430 nearly linear with the size of the data. In general for a balanced 4431 textual document the internal memory requirement is about 4 times the 4432 size of the UTF8 serialization of this document (example the XML-1.0 4433 recommendation is a bit more of 150KBytes and takes 650KBytes of main 4434 memory when parsed). Validation will add a amount of memory required for 4435 maintaining the external Dtd state which should be linear with the 4436 complexity of the content model defined by the Dtd</li> 4437 <li>If you need to work with fixed memory requirements or don't need the 4438 full DOM tree then using the <a href="xmlreader.html">xmlReader 4439 interface</a> is probably the best way to proceed, it still allows to 4440 validate or operate on subset of the tree if needed.</li> 4441 <li>If you don't care about the advanced features of libxml2 like 4442 validation, DOM, XPath or XPointer, don't use entities, need to work with 4443 fixed memory requirements, and try to get the fastest parsing possible 4444 then the SAX interface should be used, but it has known restrictions.</li> 4445 </ul> 4446 4447 <p></p> 4448 <h3><a name="Compacting">Returning memory to the kernel</a></h3> 4449 4450 <p>You may encounter that your process using libxml2 does not have a 4451 reduced memory usage although you freed the trees. This is because 4452 libxml2 allocates memory in a number of small chunks. When freeing one 4453 of those chunks, the OS may decide that giving this little memory back 4454 to the kernel will cause too much overhead and delay the operation. As 4455 all chunks are this small, they get actually freed but not returned to 4456 the kernel. On systems using glibc, there is a function call 4457 "malloc_trim" from malloc.h which does this missing operation (note that 4458 it is allowed to fail). Thus, after freeing your tree you may simply try 4459 "malloc_trim(0);" to really get the memory back. If your OS does not 4460 provide malloc_trim, try searching for a similar function.</p> 4461 <p></p> 4462 4463 <h2><a name="Encodings">Encodings support</a></h2> 4464 4465 <p>If you are not really familiar with Internationalization (usual shortcut 4466 is I18N) , Unicode, characters and glyphs, I suggest you read a <a 4467 href="http://www.tbray.org/ongoing/When/200x/2003/04/06/Unicode">presentation</a> 4468 by Tim Bray on Unicode and why you should care about it.</p> 4469 4470 <p>If you don't understand why <b>it does not make sense to have a string 4471 without knowing what encoding it uses</b>, then as Joel Spolsky said <a 4472 href="http://www.joelonsoftware.com/articles/Unicode.html">please do not 4473 write another line of code until you finish reading that article.</a>. It is 4474 a prerequisite to understand this page, and avoid a lot of problems with 4475 libxml2, XML or text processing in general.</p> 4476 4477 <p>Table of Content:</p> 4478 <ol> 4479 <li><a href="encoding.html#What">What does internationalization support 4480 mean ?</a></li> 4481 <li><a href="encoding.html#internal">The internal encoding, how and 4482 why</a></li> 4483 <li><a href="encoding.html#implemente">How is it implemented ?</a></li> 4484 <li><a href="encoding.html#Default">Default supported encodings</a></li> 4485 <li><a href="encoding.html#extend">How to extend the existing 4486 support</a></li> 4487 </ol> 4488 4489 <h3><a name="What">What does internationalization support mean ?</a></h3> 4490 4491 <p>XML was designed from the start to allow the support of any character set 4492 by using Unicode. Any conformant XML parser has to support the UTF-8 and 4493 UTF-16 default encodings which can both express the full unicode ranges. UTF8 4494 is a variable length encoding whose greatest points are to reuse the same 4495 encoding for ASCII and to save space for Western encodings, but it is a bit 4496 more complex to handle in practice. UTF-16 use 2 bytes per character (and 4497 sometimes combines two pairs), it makes implementation easier, but looks a 4498 bit overkill for Western languages encoding. Moreover the XML specification 4499 allows the document to be encoded in other encodings at the condition that 4500 they are clearly labeled as such. For example the following is a wellformed 4501 XML document encoded in ISO-8859-1 and using accentuated letters that we 4502 French like for both markup and content:</p> 4503 <pre><?xml version="1.0" encoding="ISO-8859-1"?> 4504 <très>là </très></pre> 4505 4506 <p>Having internationalization support in libxml2 means the following:</p> 4507 <ul> 4508 <li>the document is properly parsed</li> 4509 <li>information about it's encoding is saved</li> 4510 <li>it can be modified</li> 4511 <li>it can be saved in its original encoding</li> 4512 <li>it can also be saved in another encoding supported by libxml2 (for 4513 example straight UTF8 or even an ASCII form)</li> 4514 </ul> 4515 4516 <p>Another very important point is that the whole libxml2 API, with the 4517 exception of a few routines to read with a specific encoding or save to a 4518 specific encoding, is completely agnostic about the original encoding of the 4519 document.</p> 4520 4521 <p>It should be noted too that the HTML parser embedded in libxml2 now obey 4522 the same rules too, the following document will be (as of 2.2.2) handled in 4523 an internationalized fashion by libxml2 too:</p> 4524 <pre><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" 4525 "http://www.w3.org/TR/REC-html40/loose.dtd"> 4526 <html lang="fr"> 4527 <head> 4528 <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"> 4529 </head> 4530 <body> 4531 <p>W3C crée des standards pour le Web.</body> 4532 </html></pre> 4533 4534 <h3><a name="internal">The internal encoding, how and why</a></h3> 4535 4536 <p>One of the core decisions was to force all documents to be converted to a 4537 default internal encoding, and that encoding to be UTF-8, here are the 4538 rationales for those choices:</p> 4539 <ul> 4540 <li>keeping the native encoding in the internal form would force the libxml 4541 users (or the code associated) to be fully aware of the encoding of the 4542 original document, for examples when adding a text node to a document, 4543 the content would have to be provided in the document encoding, i.e. the 4544 client code would have to check it before hand, make sure it's conformant 4545 to the encoding, etc ... Very hard in practice, though in some specific 4546 cases this may make sense.</li> 4547 <li>the second decision was which encoding. From the XML spec only UTF8 and 4548 UTF16 really makes sense as being the two only encodings for which there 4549 is mandatory support. UCS-4 (32 bits fixed size encoding) could be 4550 considered an intelligent choice too since it's a direct Unicode mapping 4551 support. I selected UTF-8 on the basis of efficiency and compatibility 4552 with surrounding software: 4553 <ul> 4554 <li>UTF-8 while a bit more complex to convert from/to (i.e. slightly 4555 more costly to import and export CPU wise) is also far more compact 4556 than UTF-16 (and UCS-4) for a majority of the documents I see it used 4557 for right now (RPM RDF catalogs, advogato data, various configuration 4558 file formats, etc.) and the key point for today's computer 4559 architecture is efficient uses of caches. If one nearly double the 4560 memory requirement to store the same amount of data, this will trash 4561 caches (main memory/external caches/internal caches) and my take is 4562 that this harms the system far more than the CPU requirements needed 4563 for the conversion to UTF-8</li> 4564 <li>Most of libxml2 version 1 users were using it with straight ASCII 4565 most of the time, doing the conversion with an internal encoding 4566 requiring all their code to be rewritten was a serious show-stopper 4567 for using UTF-16 or UCS-4.</li> 4568 <li>UTF-8 is being used as the de-facto internal encoding standard for 4569 related code like the <a href="http://www.pango.org/">pango</a> 4570 upcoming Gnome text widget, and a lot of Unix code (yet another place 4571 where Unix programmer base takes a different approach from Microsoft 4572 - they are using UTF-16)</li> 4573 </ul> 4574 </li> 4575 </ul> 4576 4577 <p>What does this mean in practice for the libxml2 user:</p> 4578 <ul> 4579 <li>xmlChar, the libxml2 data type is a byte, those bytes must be assembled 4580 as UTF-8 valid strings. The proper way to terminate an xmlChar * string 4581 is simply to append 0 byte, as usual.</li> 4582 <li>One just need to make sure that when using chars outside the ASCII set, 4583 the values has been properly converted to UTF-8</li> 4584 </ul> 4585 4586 <h3><a name="implemente">How is it implemented ?</a></h3> 4587 4588 <p>Let's describe how all this works within libxml, basically the I18N 4589 (internationalization) support get triggered only during I/O operation, i.e. 4590 when reading a document or saving one. Let's look first at the reading 4591 sequence:</p> 4592 <ol> 4593 <li>when a document is processed, we usually don't know the encoding, a 4594 simple heuristic allows to detect UTF-16 and UCS-4 from encodings where 4595 the ASCII range (0-0x7F) maps with ASCII</li> 4596 <li>the xml declaration if available is parsed, including the encoding 4597 declaration. At that point, if the autodetected encoding is different 4598 from the one declared a call to xmlSwitchEncoding() is issued.</li> 4599 <li>If there is no encoding declaration, then the input has to be in either 4600 UTF-8 or UTF-16, if it is not then at some point when processing the 4601 input, the converter/checker of UTF-8 form will raise an encoding error. 4602 You may end-up with a garbled document, or no document at all ! Example: 4603 <pre>~/XML -> ./xmllint err.xml 4604 err.xml:1: error: Input is not proper UTF-8, indicate encoding ! 4605 <très>là</très> 4606 ^ 4607 err.xml:1: error: Bytes: 0xE8 0x73 0x3E 0x6C 4608 <très>là</très> 4609 ^</pre> 4610 </li> 4611 <li>xmlSwitchEncoding() does an encoding name lookup, canonicalize it, and 4612 then search the default registered encoding converters for that encoding. 4613 If it's not within the default set and iconv() support has been compiled 4614 it, it will ask iconv for such an encoder. If this fails then the parser 4615 will report an error and stops processing: 4616 <pre>~/XML -> ./xmllint err2.xml 4617 err2.xml:1: error: Unsupported encoding UnsupportedEnc 4618 <?xml version="1.0" encoding="UnsupportedEnc"?> 4619 ^</pre> 4620 </li> 4621 <li>From that point the encoder processes progressively the input (it is 4622 plugged as a front-end to the I/O module) for that entity. It captures 4623 and converts on-the-fly the document to be parsed to UTF-8. The parser 4624 itself just does UTF-8 checking of this input and process it 4625 transparently. The only difference is that the encoding information has 4626 been added to the parsing context (more precisely to the input 4627 corresponding to this entity).</li> 4628 <li>The result (when using DOM) is an internal form completely in UTF-8 4629 with just an encoding information on the document node.</li> 4630 </ol> 4631 4632 <p>Ok then what happens when saving the document (assuming you 4633 collected/built an xmlDoc DOM like structure) ? It depends on the function 4634 called, xmlSaveFile() will just try to save in the original encoding, while 4635 xmlSaveFileTo() and xmlSaveFileEnc() can optionally save to a given 4636 encoding:</p> 4637 <ol> 4638 <li>if no encoding is given, libxml2 will look for an encoding value 4639 associated to the document and if it exists will try to save to that 4640 encoding, 4641 <p>otherwise everything is written in the internal form, i.e. UTF-8</p> 4642 </li> 4643 <li>so if an encoding was specified, either at the API level or on the 4644 document, libxml2 will again canonicalize the encoding name, lookup for a 4645 converter in the registered set or through iconv. If not found the 4646 function will return an error code</li> 4647 <li>the converter is placed before the I/O buffer layer, as another kind of 4648 buffer, then libxml2 will simply push the UTF-8 serialization to through 4649 that buffer, which will then progressively be converted and pushed onto 4650 the I/O layer.</li> 4651 <li>It is possible that the converter code fails on some input, for example 4652 trying to push an UTF-8 encoded Chinese character through the UTF-8 to 4653 ISO-8859-1 converter won't work. Since the encoders are progressive they 4654 will just report the error and the number of bytes converted, at that 4655 point libxml2 will decode the offending character, remove it from the 4656 buffer and replace it with the associated charRef encoding &#123; and 4657 resume the conversion. This guarantees that any document will be saved 4658 without losses (except for markup names where this is not legal, this is 4659 a problem in the current version, in practice avoid using non-ascii 4660 characters for tag or attribute names). A special "ascii" encoding name 4661 is used to save documents to a pure ascii form can be used when 4662 portability is really crucial</li> 4663 </ol> 4664 4665 <p>Here are a few examples based on the same test document and assumin a 4666 terminal using ISO-8859-1 as the text encoding:</p> 4667 <pre>~/XML -> ./xmllint isolat1 4668 <?xml version="1.0" encoding="ISO-8859-1"?> 4669 <très>l</très> 4670 ~/XML -> ./xmllint --encode UTF-8 isolat1 4671 <?xml version="1.0" encoding="UTF-8"?> 4672 <trs>l </trs> 4673 ~/XML -> </pre> 4674 4675 <p>The same processing is applied (and reuse most of the code) for HTML I18N 4676 processing. Looking up and modifying the content encoding is a bit more 4677 difficult since it is located in a <meta> tag under the <head>, 4678 so a couple of functions htmlGetMetaEncoding() and htmlSetMetaEncoding() have 4679 been provided. The parser also attempts to switch encoding on the fly when 4680 detecting such a tag on input. Except for that the processing is the same 4681 (and again reuses the same code).</p> 4682 4683 <h3><a name="Default">Default supported encodings</a></h3> 4684 4685 <p>libxml2 has a set of default converters for the following encodings 4686 (located in encoding.c):</p> 4687 <ol> 4688 <li>UTF-8 is supported by default (null handlers)</li> 4689 <li>UTF-16, both little and big endian</li> 4690 <li>ISO-Latin-1 (ISO-8859-1) covering most western languages</li> 4691 <li>ASCII, useful mostly for saving</li> 4692 <li>HTML, a specific handler for the conversion of UTF-8 to ASCII with HTML 4693 predefined entities like &copy; for the Copyright sign.</li> 4694 </ol> 4695 4696 <p>More over when compiled on an Unix platform with iconv support the full 4697 set of encodings supported by iconv can be instantly be used by libxml. On a 4698 linux machine with glibc-2.1 the list of supported encodings and aliases fill 4699 3 full pages, and include UCS-4, the full set of ISO-Latin encodings, and the 4700 various Japanese ones.</p> 4701 4702 <p>To convert from the UTF-8 values returned from the API to another encoding 4703 then it is possible to use the function provided from <a 4704 href="html/libxml-encoding.html">the encoding module</a> like <a 4705 href="html/libxml-encoding.html#UTF8Toisolat1">UTF8Toisolat1</a>, or use the 4706 POSIX <a 4707 href="http://www.opengroup.org/onlinepubs/009695399/functions/iconv.html">iconv()</a> 4708 API directly.</p> 4709 4710 <h4>Encoding aliases</h4> 4711 4712 <p>From 2.2.3, libxml2 has support to register encoding names aliases. The 4713 goal is to be able to parse document whose encoding is supported but where 4714 the name differs (for example from the default set of names accepted by 4715 iconv). The following functions allow to register and handle new aliases for 4716 existing encodings. Once registered libxml2 will automatically lookup the 4717 aliases when handling a document:</p> 4718 <ul> 4719 <li>int xmlAddEncodingAlias(const char *name, const char *alias);</li> 4720 <li>int xmlDelEncodingAlias(const char *alias);</li> 4721 <li>const char * xmlGetEncodingAlias(const char *alias);</li> 4722 <li>void xmlCleanupEncodingAliases(void);</li> 4723 </ul> 4724 4725 <h3><a name="extend">How to extend the existing support</a></h3> 4726 4727 <p>Well adding support for new encoding, or overriding one of the encoders 4728 (assuming it is buggy) should not be hard, just write input and output 4729 conversion routines to/from UTF-8, and register them using 4730 xmlNewCharEncodingHandler(name, xxxToUTF8, UTF8Toxxx), and they will be 4731 called automatically if the parser(s) encounter such an encoding name 4732 (register it uppercase, this will help). The description of the encoders, 4733 their arguments and expected return values are described in the encoding.h 4734 header.</p> 4735 4736 <h2><a name="IO">I/O Interfaces</a></h2> 4737 4738 <p>Table of Content:</p> 4739 <ol> 4740 <li><a href="#General1">General overview</a></li> 4741 <li><a href="#basic">The basic buffer type</a></li> 4742 <li><a href="#Input">Input I/O handlers</a></li> 4743 <li><a href="#Output">Output I/O handlers</a></li> 4744 <li><a href="#entities">The entities loader</a></li> 4745 <li><a href="#Example2">Example of customized I/O</a></li> 4746 </ol> 4747 4748 <h3><a name="General1">General overview</a></h3> 4749 4750 <p>The module <code><a 4751 href="http://xmlsoft.org/html/libxml-xmlio.html">xmlIO.h</a></code> provides 4752 the interfaces to the libxml2 I/O system. This consists of 4 main parts:</p> 4753 <ul> 4754 <li>Entities loader, this is a routine which tries to fetch the entities 4755 (files) based on their PUBLIC and SYSTEM identifiers. The default loader 4756 don't look at the public identifier since libxml2 do not maintain a 4757 catalog. You can redefine you own entity loader by using 4758 <code>xmlGetExternalEntityLoader()</code> and 4759 <code>xmlSetExternalEntityLoader()</code>. <a href="#entities">Check the 4760 example</a>.</li> 4761 <li>Input I/O buffers which are a commodity structure used by the parser(s) 4762 input layer to handle fetching the information to feed the parser. This 4763 provides buffering and is also a placeholder where the encoding 4764 converters to UTF8 are piggy-backed.</li> 4765 <li>Output I/O buffers are similar to the Input ones and fulfill similar 4766 task but when generating a serialization from a tree.</li> 4767 <li>A mechanism to register sets of I/O callbacks and associate them with 4768 specific naming schemes like the protocol part of the URIs. 4769 <p>This affect the default I/O operations and allows to use specific I/O 4770 handlers for certain names.</p> 4771 </li> 4772 </ul> 4773 4774 <p>The general mechanism used when loading http://rpmfind.net/xml.html for 4775 example in the HTML parser is the following:</p> 4776 <ol> 4777 <li>The default entity loader calls <code>xmlNewInputFromFile()</code> with 4778 the parsing context and the URI string.</li> 4779 <li>the URI string is checked against the existing registered handlers 4780 using their match() callback function, if the HTTP module was compiled 4781 in, it is registered and its match() function will succeeds</li> 4782 <li>the open() function of the handler is called and if successful will 4783 return an I/O Input buffer</li> 4784 <li>the parser will the start reading from this buffer and progressively 4785 fetch information from the resource, calling the read() function of the 4786 handler until the resource is exhausted</li> 4787 <li>if an encoding change is detected it will be installed on the input 4788 buffer, providing buffering and efficient use of the conversion 4789 routines</li> 4790 <li>once the parser has finished, the close() function of the handler is 4791 called once and the Input buffer and associated resources are 4792 deallocated.</li> 4793 </ol> 4794 4795 <p>The user defined callbacks are checked first to allow overriding of the 4796 default libxml2 I/O routines.</p> 4797 4798 <h3><a name="basic">The basic buffer type</a></h3> 4799 4800 <p>All the buffer manipulation handling is done using the 4801 <code>xmlBuffer</code> type define in <code><a 4802 href="http://xmlsoft.org/html/libxml-tree.html">tree.h</a> </code>which is a 4803 resizable memory buffer. The buffer allocation strategy can be selected to be 4804 either best-fit or use an exponential doubling one (CPU vs. memory use 4805 trade-off). The values are <code>XML_BUFFER_ALLOC_EXACT</code> and 4806 <code>XML_BUFFER_ALLOC_DOUBLEIT</code>, and can be set individually or on a 4807 system wide basis using <code>xmlBufferSetAllocationScheme()</code>. A number 4808 of functions allows to manipulate buffers with names starting with the 4809 <code>xmlBuffer...</code> prefix.</p> 4810 4811 <h3><a name="Input">Input I/O handlers</a></h3> 4812 4813 <p>An Input I/O handler is a simple structure 4814 <code>xmlParserInputBuffer</code> containing a context associated to the 4815 resource (file descriptor, or pointer to a protocol handler), the read() and 4816 close() callbacks to use and an xmlBuffer. And extra xmlBuffer and a charset 4817 encoding handler are also present to support charset conversion when 4818 needed.</p> 4819 4820 <h3><a name="Output">Output I/O handlers</a></h3> 4821 4822 <p>An Output handler <code>xmlOutputBuffer</code> is completely similar to an 4823 Input one except the callbacks are write() and close().</p> 4824 4825 <h3><a name="entities">The entities loader</a></h3> 4826 4827 <p>The entity loader resolves requests for new entities and create inputs for 4828 the parser. Creating an input from a filename or an URI string is done 4829 through the xmlNewInputFromFile() routine. The default entity loader do not 4830 handle the PUBLIC identifier associated with an entity (if any). So it just 4831 calls xmlNewInputFromFile() with the SYSTEM identifier (which is mandatory in 4832 XML).</p> 4833 4834 <p>If you want to hook up a catalog mechanism then you simply need to 4835 override the default entity loader, here is an example:</p> 4836 <pre>#include <libxml/xmlIO.h> 4837 4838 xmlExternalEntityLoader defaultLoader = NULL; 4839 4840 xmlParserInputPtr 4841 xmlMyExternalEntityLoader(const char *URL, const char *ID, 4842 xmlParserCtxtPtr ctxt) { 4843 xmlParserInputPtr ret; 4844 const char *fileID = NULL; 4845 /* lookup for the fileID depending on ID */ 4846 4847 ret = xmlNewInputFromFile(ctxt, fileID); 4848 if (ret != NULL) 4849 return(ret); 4850 if (defaultLoader != NULL) 4851 ret = defaultLoader(URL, ID, ctxt); 4852 return(ret); 4853 } 4854 4855 int main(..) { 4856 ... 4857 4858 /* 4859 * Install our own entity loader 4860 */ 4861 defaultLoader = xmlGetExternalEntityLoader(); 4862 xmlSetExternalEntityLoader(xmlMyExternalEntityLoader); 4863 4864 ... 4865 }</pre> 4866 4867 <h3><a name="Example2">Example of customized I/O</a></h3> 4868 4869 <p>This example come from <a href="http://xmlsoft.org/messages/0708.html">a 4870 real use case</a>, xmlDocDump() closes the FILE * passed by the application 4871 and this was a problem. The <a 4872 href="http://xmlsoft.org/messages/0711.html">solution</a> was to redefine a 4873 new output handler with the closing call deactivated:</p> 4874 <ol> 4875 <li>First define a new I/O output allocator where the output don't close 4876 the file: 4877 <pre>xmlOutputBufferPtr 4878 xmlOutputBufferCreateOwn(FILE *file, xmlCharEncodingHandlerPtr encoder) { 4879 xmlOutputBufferPtr ret; 4880 4881 if (xmlOutputCallbackInitialized == 0) 4882 xmlRegisterDefaultOutputCallbacks(); 4883 4884 if (file == NULL) return(NULL); 4885 ret = xmlAllocOutputBuffer(encoder); 4886 if (ret != NULL) { 4887 ret->context = file; 4888 ret->writecallback = xmlFileWrite; 4889 ret->closecallback = NULL; /* No close callback */ 4890 } 4891 return(ret); 4892 } </pre> 4893 </li> 4894 <li>And then use it to save the document: 4895 <pre>FILE *f; 4896 xmlOutputBufferPtr output; 4897 xmlDocPtr doc; 4898 int res; 4899 4900 f = ... 4901 doc = .... 4902 4903 output = xmlOutputBufferCreateOwn(f, NULL); 4904 res = xmlSaveFileTo(output, doc, NULL); 4905 </pre> 4906 </li> 4907 </ol> 4908 4909 <h2><a name="Catalog">Catalog support</a></h2> 4910 4911 <p>Table of Content:</p> 4912 <ol> 4913 <li><a href="General2">General overview</a></li> 4914 <li><a href="#definition">The definition</a></li> 4915 <li><a href="#Simple">Using catalogs</a></li> 4916 <li><a href="#Some">Some examples</a></li> 4917 <li><a href="#reference">How to tune catalog usage</a></li> 4918 <li><a href="#validate">How to debug catalog processing</a></li> 4919 <li><a href="#Declaring">How to create and maintain catalogs</a></li> 4920 <li><a href="#implemento">The implementor corner quick review of the 4921 API</a></li> 4922 <li><a href="#Other">Other resources</a></li> 4923 </ol> 4924 4925 <h3><a name="General2">General overview</a></h3> 4926 4927 <p>What is a catalog? Basically it's a lookup mechanism used when an entity 4928 (a file or a remote resource) references another entity. The catalog lookup 4929 is inserted between the moment the reference is recognized by the software 4930 (XML parser, stylesheet processing, or even images referenced for inclusion 4931 in a rendering) and the time where loading that resource is actually 4932 started.</p> 4933 4934 <p>It is basically used for 3 things:</p> 4935 <ul> 4936 <li>mapping from "logical" names, the public identifiers and a more 4937 concrete name usable for download (and URI). For example it can associate 4938 the logical name 4939 <p>"-//OASIS//DTD DocBook XML V4.1.2//EN"</p> 4940 <p>of the DocBook 4.1.2 XML DTD with the actual URL where it can be 4941 downloaded</p> 4942 <p>http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd</p> 4943 </li> 4944 <li>remapping from a given URL to another one, like an HTTP indirection 4945 saying that 4946 <p>"http://www.oasis-open.org/committes/tr.xsl"</p> 4947 <p>should really be looked at</p> 4948 <p>"http://www.oasis-open.org/committes/entity/stylesheets/base/tr.xsl"</p> 4949 </li> 4950 <li>providing a local cache mechanism allowing to load the entities 4951 associated to public identifiers or remote resources, this is a really 4952 important feature for any significant deployment of XML or SGML since it 4953 allows to avoid the aleas and delays associated to fetching remote 4954 resources.</li> 4955 </ul> 4956 4957 <h3><a name="definition">The definitions</a></h3> 4958 4959 <p>Libxml, as of 2.4.3 implements 2 kind of catalogs:</p> 4960 <ul> 4961 <li>the older SGML catalogs, the official spec is SGML Open Technical 4962 Resolution TR9401:1997, but is better understood by reading <a 4963 href="http://www.jclark.com/sp/catalog.htm">the SP Catalog page</a> from 4964 James Clark. This is relatively old and not the preferred mode of 4965 operation of libxml.</li> 4966 <li><a href="http://www.oasis-open.org/committees/entity/spec.html">XML 4967 Catalogs</a> is far more flexible, more recent, uses an XML syntax and 4968 should scale quite better. This is the default option of libxml.</li> 4969 </ul> 4970 4971 <p></p> 4972 4973 <h3><a name="Simple">Using catalog</a></h3> 4974 4975 <p>In a normal environment libxml2 will by default check the presence of a 4976 catalog in /etc/xml/catalog, and assuming it has been correctly populated, 4977 the processing is completely transparent to the document user. To take a 4978 concrete example, suppose you are authoring a DocBook document, this one 4979 starts with the following DOCTYPE definition:</p> 4980 <pre><?xml version='1.0'?> 4981 <!DOCTYPE book PUBLIC "-//Norman Walsh//DTD DocBk XML V3.1.4//EN" 4982 "http://nwalsh.com/docbook/xml/3.1.4/db3xml.dtd"></pre> 4983 4984 <p>When validating the document with libxml, the catalog will be 4985 automatically consulted to lookup the public identifier "-//Norman Walsh//DTD 4986 DocBk XML V3.1.4//EN" and the system identifier 4987 "http://nwalsh.com/docbook/xml/3.1.4/db3xml.dtd", and if these entities have 4988 been installed on your system and the catalogs actually point to them, libxml 4989 will fetch them from the local disk.</p> 4990 4991 <p style="font-size: 10pt"><strong>Note</strong>: Really don't use this 4992 DOCTYPE example it's a really old version, but is fine as an example.</p> 4993 4994 <p>Libxml2 will check the catalog each time that it is requested to load an 4995 entity, this includes DTD, external parsed entities, stylesheets, etc ... If 4996 your system is correctly configured all the authoring phase and processing 4997 should use only local files, even if your document stays portable because it 4998 uses the canonical public and system ID, referencing the remote document.</p> 4999 5000 <h3><a name="Some">Some examples:</a></h3> 5001 5002 <p>Here is a couple of fragments from XML Catalogs used in libxml2 early 5003 regression tests in <code>test/catalogs</code> :</p> 5004 <pre><?xml version="1.0"?> 5005 <!DOCTYPE catalog PUBLIC 5006 "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN" 5007 "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd"> 5008 <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"> 5009 <public publicId="-//OASIS//DTD DocBook XML V4.1.2//EN" 5010 uri="http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"/> 5011 ...</pre> 5012 5013 <p>This is the beginning of a catalog for DocBook 4.1.2, XML Catalogs are 5014 written in XML, there is a specific namespace for catalog elements 5015 "urn:oasis:names:tc:entity:xmlns:xml:catalog". The first entry in this 5016 catalog is a <code>public</code> mapping it allows to associate a Public 5017 Identifier with an URI.</p> 5018 <pre>... 5019 <rewriteSystem systemIdStartString="http://www.oasis-open.org/docbook/" 5020 rewritePrefix="file:///usr/share/xml/docbook/"/> 5021 ...</pre> 5022 5023 <p>A <code>rewriteSystem</code> is a very powerful instruction, it says that 5024 any URI starting with a given prefix should be looked at another URI 5025 constructed by replacing the prefix with an new one. In effect this acts like 5026 a cache system for a full area of the Web. In practice it is extremely useful 5027 with a file prefix if you have installed a copy of those resources on your 5028 local system.</p> 5029 <pre>... 5030 <delegatePublic publicIdStartString="-//OASIS//DTD XML Catalog //" 5031 catalog="file:///usr/share/xml/docbook.xml"/> 5032 <delegatePublic publicIdStartString="-//OASIS//ENTITIES DocBook XML" 5033 catalog="file:///usr/share/xml/docbook.xml"/> 5034 <delegatePublic publicIdStartString="-//OASIS//DTD DocBook XML" 5035 catalog="file:///usr/share/xml/docbook.xml"/> 5036 <delegateSystem systemIdStartString="http://www.oasis-open.org/docbook/" 5037 catalog="file:///usr/share/xml/docbook.xml"/> 5038 <delegateURI uriStartString="http://www.oasis-open.org/docbook/" 5039 catalog="file:///usr/share/xml/docbook.xml"/> 5040 ...</pre> 5041 5042 <p>Delegation is the core features which allows to build a tree of catalogs, 5043 easier to maintain than a single catalog, based on Public Identifier, System 5044 Identifier or URI prefixes it instructs the catalog software to look up 5045 entries in another resource. This feature allow to build hierarchies of 5046 catalogs, the set of entries presented should be sufficient to redirect the 5047 resolution of all DocBook references to the specific catalog in 5048 <code>/usr/share/xml/docbook.xml</code> this one in turn could delegate all 5049 references for DocBook 4.2.1 to a specific catalog installed at the same time 5050 as the DocBook resources on the local machine.</p> 5051 5052 <h3><a name="reference">How to tune catalog usage:</a></h3> 5053 5054 <p>The user can change the default catalog behaviour by redirecting queries 5055 to its own set of catalogs, this can be done by setting the 5056 <code>XML_CATALOG_FILES</code> environment variable to a list of catalogs, an 5057 empty one should deactivate loading the default <code>/etc/xml/catalog</code> 5058 default catalog</p> 5059 5060 <h3><a name="validate">How to debug catalog processing:</a></h3> 5061 5062 <p>Setting up the <code>XML_DEBUG_CATALOG</code> environment variable will 5063 make libxml2 output debugging information for each catalog operations, for 5064 example:</p> 5065 <pre>orchis:~/XML -> xmllint --memory --noout test/ent2 5066 warning: failed to load external entity "title.xml" 5067 orchis:~/XML -> export XML_DEBUG_CATALOG= 5068 orchis:~/XML -> xmllint --memory --noout test/ent2 5069 Failed to parse catalog /etc/xml/catalog 5070 Failed to parse catalog /etc/xml/catalog 5071 warning: failed to load external entity "title.xml" 5072 Catalogs cleanup 5073 orchis:~/XML -> </pre> 5074 5075 <p>The test/ent2 references an entity, running the parser from memory makes 5076 the base URI unavailable and the the "title.xml" entity cannot be loaded. 5077 Setting up the debug environment variable allows to detect that an attempt is 5078 made to load the <code>/etc/xml/catalog</code> but since it's not present the 5079 resolution fails.</p> 5080 5081 <p>But the most advanced way to debug XML catalog processing is to use the 5082 <strong>xmlcatalog</strong> command shipped with libxml2, it allows to load 5083 catalogs and make resolution queries to see what is going on. This is also 5084 used for the regression tests:</p> 5085 <pre>orchis:~/XML -> ./xmlcatalog test/catalogs/docbook.xml \ 5086 "-//OASIS//DTD DocBook XML V4.1.2//EN" 5087 http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd 5088 orchis:~/XML -> </pre> 5089 5090 <p>For debugging what is going on, adding one -v flags increase the verbosity 5091 level to indicate the processing done (adding a second flag also indicate 5092 what elements are recognized at parsing):</p> 5093 <pre>orchis:~/XML -> ./xmlcatalog -v test/catalogs/docbook.xml \ 5094 "-//OASIS//DTD DocBook XML V4.1.2//EN" 5095 Parsing catalog test/catalogs/docbook.xml's content 5096 Found public match -//OASIS//DTD DocBook XML V4.1.2//EN 5097 http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd 5098 Catalogs cleanup 5099 orchis:~/XML -> </pre> 5100 5101 <p>A shell interface is also available to debug and process multiple queries 5102 (and for regression tests):</p> 5103 <pre>orchis:~/XML -> ./xmlcatalog -shell test/catalogs/docbook.xml \ 5104 "-//OASIS//DTD DocBook XML V4.1.2//EN" 5105 > help 5106 Commands available: 5107 public PublicID: make a PUBLIC identifier lookup 5108 system SystemID: make a SYSTEM identifier lookup 5109 resolve PublicID SystemID: do a full resolver lookup 5110 add 'type' 'orig' 'replace' : add an entry 5111 del 'values' : remove values 5112 dump: print the current catalog state 5113 debug: increase the verbosity level 5114 quiet: decrease the verbosity level 5115 exit: quit the shell 5116 > public "-//OASIS//DTD DocBook XML V4.1.2//EN" 5117 http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd 5118 > quit 5119 orchis:~/XML -> </pre> 5120 5121 <p>This should be sufficient for most debugging purpose, this was actually 5122 used heavily to debug the XML Catalog implementation itself.</p> 5123 5124 <h3><a name="Declaring">How to create and maintain</a> catalogs:</h3> 5125 5126 <p>Basically XML Catalogs are XML files, you can either use XML tools to 5127 manage them or use <strong>xmlcatalog</strong> for this. The basic step is 5128 to create a catalog the -create option provide this facility:</p> 5129 <pre>orchis:~/XML -> ./xmlcatalog --create tst.xml 5130 <?xml version="1.0"?> 5131 <!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN" 5132 "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd"> 5133 <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"/> 5134 orchis:~/XML -> </pre> 5135 5136 <p>By default xmlcatalog does not overwrite the original catalog and save the 5137 result on the standard output, this can be overridden using the -noout 5138 option. The <code>-add</code> command allows to add entries in the 5139 catalog:</p> 5140 <pre>orchis:~/XML -> ./xmlcatalog --noout --create --add "public" \ 5141 "-//OASIS//DTD DocBook XML V4.1.2//EN" \ 5142 http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd tst.xml 5143 orchis:~/XML -> cat tst.xml 5144 <?xml version="1.0"?> 5145 <!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN" \ 5146 "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd"> 5147 <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"> 5148 <public publicId="-//OASIS//DTD DocBook XML V4.1.2//EN" 5149 uri="http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"/> 5150 </catalog> 5151 orchis:~/XML -> </pre> 5152 5153 <p>The <code>-add</code> option will always take 3 parameters even if some of 5154 the XML Catalog constructs (like nextCatalog) will have only a single 5155 argument, just pass a third empty string, it will be ignored.</p> 5156 5157 <p>Similarly the <code>-del</code> option remove matching entries from the 5158 catalog:</p> 5159 <pre>orchis:~/XML -> ./xmlcatalog --del \ 5160 "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" tst.xml 5161 <?xml version="1.0"?> 5162 <!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN" 5163 "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd"> 5164 <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"/> 5165 orchis:~/XML -> </pre> 5166 5167 <p>The catalog is now empty. Note that the matching of <code>-del</code> is 5168 exact and would have worked in a similar fashion with the Public ID 5169 string.</p> 5170 5171 <p>This is rudimentary but should be sufficient to manage a not too complex 5172 catalog tree of resources.</p> 5173 5174 <h3><a name="implemento">The implementor corner quick review of the 5175 API:</a></h3> 5176 5177 <p>First, and like for every other module of libxml, there is an 5178 automatically generated <a href="html/libxml-catalog.html">API page for 5179 catalog support</a>.</p> 5180 5181 <p>The header for the catalog interfaces should be included as:</p> 5182 <pre>#include <libxml/catalog.h></pre> 5183 5184 <p>The API is voluntarily kept very simple. First it is not obvious that 5185 applications really need access to it since it is the default behaviour of 5186 libxml2 (Note: it is possible to completely override libxml2 default catalog 5187 by using <a href="html/libxml-parser.html">xmlSetExternalEntityLoader</a> to 5188 plug an application specific resolver).</p> 5189 5190 <p>Basically libxml2 support 2 catalog lists:</p> 5191 <ul> 5192 <li>the default one, global shared by all the application</li> 5193 <li>a per-document catalog, this one is built if the document uses the 5194 <code>oasis-xml-catalog</code> PIs to specify its own catalog list, it is 5195 associated to the parser context and destroyed when the parsing context 5196 is destroyed.</li> 5197 </ul> 5198 5199 <p>the document one will be used first if it exists.</p> 5200 5201 <h4>Initialization routines:</h4> 5202 5203 <p>xmlInitializeCatalog(), xmlLoadCatalog() and xmlLoadCatalogs() should be 5204 used at startup to initialize the catalog, if the catalog should be 5205 initialized with specific values xmlLoadCatalog() or xmlLoadCatalogs() 5206 should be called before xmlInitializeCatalog() which would otherwise do a 5207 default initialization first.</p> 5208 5209 <p>The xmlCatalogAddLocal() call is used by the parser to grow the document 5210 own catalog list if needed.</p> 5211 5212 <h4>Preferences setup:</h4> 5213 5214 <p>The XML Catalog spec requires the possibility to select default 5215 preferences between public and system delegation, 5216 xmlCatalogSetDefaultPrefer() allows this, xmlCatalogSetDefaults() and 5217 xmlCatalogGetDefaults() allow to control if XML Catalogs resolution should 5218 be forbidden, allowed for global catalog, for document catalog or both, the 5219 default is to allow both.</p> 5220 5221 <p>And of course xmlCatalogSetDebug() allows to generate debug messages 5222 (through the xmlGenericError() mechanism).</p> 5223 5224 <h4>Querying routines:</h4> 5225 5226 <p>xmlCatalogResolve(), xmlCatalogResolveSystem(), xmlCatalogResolvePublic() 5227 and xmlCatalogResolveURI() are relatively explicit if you read the XML 5228 Catalog specification they correspond to section 7 algorithms, they should 5229 also work if you have loaded an SGML catalog with a simplified semantic.</p> 5230 5231 <p>xmlCatalogLocalResolve() and xmlCatalogLocalResolveURI() are the same but 5232 operate on the document catalog list</p> 5233 5234 <h4>Cleanup and Miscellaneous:</h4> 5235 5236 <p>xmlCatalogCleanup() free-up the global catalog, xmlCatalogFreeLocal() is 5237 the per-document equivalent.</p> 5238 5239 <p>xmlCatalogAdd() and xmlCatalogRemove() are used to dynamically modify the 5240 first catalog in the global list, and xmlCatalogDump() allows to dump a 5241 catalog state, those routines are primarily designed for xmlcatalog, I'm not 5242 sure that exposing more complex interfaces (like navigation ones) would be 5243 really useful.</p> 5244 5245 <p>The xmlParseCatalogFile() is a function used to load XML Catalog files, 5246 it's similar as xmlParseFile() except it bypass all catalog lookups, it's 5247 provided because this functionality may be useful for client tools.</p> 5248 5249 <h4>threaded environments:</h4> 5250 5251 <p>Since the catalog tree is built progressively, some care has been taken to 5252 try to avoid troubles in multithreaded environments. The code is now thread 5253 safe assuming that the libxml2 library has been compiled with threads 5254 support.</p> 5255 5256 <p></p> 5257 5258 <h3><a name="Other">Other resources</a></h3> 5259 5260 <p>The XML Catalog specification is relatively recent so there isn't much 5261 literature to point at:</p> 5262 <ul> 5263 <li>You can find a good rant from Norm Walsh about <a 5264 href="http://www.arbortext.com/Think_Tank/XML_Resources/Issue_Three/issue_three.html">the 5265 need for catalogs</a>, it provides a lot of context information even if 5266 I don't agree with everything presented. Norm also wrote a more recent 5267 article <a 5268 href="http://wwws.sun.com/software/xml/developers/resolver/article/">XML 5269 entities and URI resolvers</a> describing them.</li> 5270 <li>An <a href="http://home.ccil.org/~cowan/XML/XCatalog.html">old XML 5271 catalog proposal</a> from John Cowan</li> 5272 <li>The <a href="http://www.rddl.org/">Resource Directory Description 5273 Language</a> (RDDL) another catalog system but more oriented toward 5274 providing metadata for XML namespaces.</li> 5275 <li>the page from the OASIS Technical <a 5276 href="http://www.oasis-open.org/committees/entity/">Committee on Entity 5277 Resolution</a> who maintains XML Catalog, you will find pointers to the 5278 specification update, some background and pointers to others tools 5279 providing XML Catalog support</li> 5280 <li>There is a <a href="buildDocBookCatalog">shell script</a> to generate 5281 XML Catalogs for DocBook 4.1.2 . If it can write to the /etc/xml/ 5282 directory, it will set-up /etc/xml/catalog and /etc/xml/docbook based on 5283 the resources found on the system. Otherwise it will just create 5284 ~/xmlcatalog and ~/dbkxmlcatalog and doing: 5285 <p><code>export XML_CATALOG_FILES=$HOME/xmlcatalog</code></p> 5286 <p>should allow to process DocBook documentations without requiring 5287 network accesses for the DTD or stylesheets</p> 5288 </li> 5289 <li>I have uploaded <a href="ftp://xmlsoft.org/libxml2/test/dbk412catalog.tar.gz">a 5290 small tarball</a> containing XML Catalogs for DocBook 4.1.2 which seems 5291 to work fine for me too</li> 5292 <li>The <a href="http://www.xmlsoft.org/xmlcatalog_man.html">xmlcatalog 5293 manual page</a></li> 5294 </ul> 5295 5296 <p>If you have suggestions for corrections or additions, simply contact 5297 me:</p> 5298 5299 <h2><a name="library">The parser interfaces</a></h2> 5300 5301 <p>This section is directly intended to help programmers getting bootstrapped 5302 using the XML tollkit from the C language. It is not intended to be 5303 extensive. I hope the automatically generated documents will provide the 5304 completeness required, but as a separate set of documents. The interfaces of 5305 the XML parser are by principle low level, Those interested in a higher level 5306 API should <a href="#DOM">look at DOM</a>.</p> 5307 5308 <p>The <a href="html/libxml-parser.html">parser interfaces for XML</a> are 5309 separated from the <a href="html/libxml-htmlparser.html">HTML parser 5310 interfaces</a>. Let's have a look at how the XML parser can be called:</p> 5311 5312 <h3><a name="Invoking">Invoking the parser : the pull method</a></h3> 5313 5314 <p>Usually, the first thing to do is to read an XML input. The parser accepts 5315 documents either from in-memory strings or from files. The functions are 5316 defined in "parser.h":</p> 5317 <dl> 5318 <dt><code>xmlDocPtr xmlParseMemory(char *buffer, int size);</code></dt> 5319 <dd><p>Parse a null-terminated string containing the document.</p> 5320 </dd> 5321 </dl> 5322 <dl> 5323 <dt><code>xmlDocPtr xmlParseFile(const char *filename);</code></dt> 5324 <dd><p>Parse an XML document contained in a (possibly compressed) 5325 file.</p> 5326 </dd> 5327 </dl> 5328 5329 <p>The parser returns a pointer to the document structure (or NULL in case of 5330 failure).</p> 5331 5332 <h3 id="Invoking1">Invoking the parser: the push method</h3> 5333 5334 <p>In order for the application to keep the control when the document is 5335 being fetched (which is common for GUI based programs) libxml2 provides a 5336 push interface, too, as of version 1.8.3. Here are the interface 5337 functions:</p> 5338 <pre>xmlParserCtxtPtr xmlCreatePushParserCtxt(xmlSAXHandlerPtr sax, 5339 void *user_data, 5340 const char *chunk, 5341 int size, 5342 const char *filename); 5343 int xmlParseChunk (xmlParserCtxtPtr ctxt, 5344 const char *chunk, 5345 int size, 5346 int terminate);</pre> 5347 5348 <p>and here is a simple example showing how to use the interface:</p> 5349 <pre> FILE *f; 5350 5351 f = fopen(filename, "r"); 5352 if (f != NULL) { 5353 int res, size = 1024; 5354 char chars[1024]; 5355 xmlParserCtxtPtr ctxt; 5356 5357 res = fread(chars, 1, 4, f); 5358 if (res > 0) { 5359 ctxt = xmlCreatePushParserCtxt(NULL, NULL, 5360 chars, res, filename); 5361 while ((res = fread(chars, 1, size, f)) > 0) { 5362 xmlParseChunk(ctxt, chars, res, 0); 5363 } 5364 xmlParseChunk(ctxt, chars, 0, 1); 5365 doc = ctxt->myDoc; 5366 xmlFreeParserCtxt(ctxt); 5367 } 5368 }</pre> 5369 5370 <p>The HTML parser embedded into libxml2 also has a push interface; the 5371 functions are just prefixed by "html" rather than "xml".</p> 5372 5373 <h3 id="Invoking2">Invoking the parser: the SAX interface</h3> 5374 5375 <p>The tree-building interface makes the parser memory-hungry, first loading 5376 the document in memory and then building the tree itself. Reading a document 5377 without building the tree is possible using the SAX interfaces (see SAX.h and 5378 <a href="http://www.daa.com.au/~james/gnome/xml-sax/xml-sax.html">James 5379 Henstridge's documentation</a>). Note also that the push interface can be 5380 limited to SAX: just use the two first arguments of 5381 <code>xmlCreatePushParserCtxt()</code>.</p> 5382 5383 <h3><a name="Building">Building a tree from scratch</a></h3> 5384 5385 <p>The other way to get an XML tree in memory is by building it. Basically 5386 there is a set of functions dedicated to building new elements. (These are 5387 also described in <libxml/tree.h>.) For example, here is a piece of 5388 code that produces the XML document used in the previous examples:</p> 5389 <pre> #include <libxml/tree.h> 5390 xmlDocPtr doc; 5391 xmlNodePtr tree, subtree; 5392 5393 doc = xmlNewDoc("1.0"); 5394 doc->children = xmlNewDocNode(doc, NULL, "EXAMPLE", NULL); 5395 xmlSetProp(doc->children, "prop1", "gnome is great"); 5396 xmlSetProp(doc->children, "prop2", "& linux too"); 5397 tree = xmlNewChild(doc->children, NULL, "head", NULL); 5398 subtree = xmlNewChild(tree, NULL, "title", "Welcome to Gnome"); 5399 tree = xmlNewChild(doc->children, NULL, "chapter", NULL); 5400 subtree = xmlNewChild(tree, NULL, "title", "The Linux adventure"); 5401 subtree = xmlNewChild(tree, NULL, "p", "bla bla bla ..."); 5402 subtree = xmlNewChild(tree, NULL, "image", NULL); 5403 xmlSetProp(subtree, "href", "linus.gif");</pre> 5404 5405 <p>Not really rocket science ...</p> 5406 5407 <h3><a name="Traversing">Traversing the tree</a></h3> 5408 5409 <p>Basically by <a href="html/libxml-tree.html">including "tree.h"</a> your 5410 code has access to the internal structure of all the elements of the tree. 5411 The names should be somewhat simple like <strong>parent</strong>, 5412 <strong>children</strong>, <strong>next</strong>, <strong>prev</strong>, 5413 <strong>properties</strong>, etc... For example, still with the previous 5414 example:</p> 5415 <pre><code>doc->children->children->children</code></pre> 5416 5417 <p>points to the title element,</p> 5418 <pre>doc->children->children->next->children->children</pre> 5419 5420 <p>points to the text node containing the chapter title "The Linux 5421 adventure".</p> 5422 5423 <p><strong>NOTE</strong>: XML allows <em>PI</em>s and <em>comments</em> to be 5424 present before the document root, so <code>doc->children</code> may point 5425 to an element which is not the document Root Element; a function 5426 <code>xmlDocGetRootElement()</code> was added for this purpose.</p> 5427 5428 <h3><a name="Modifying">Modifying the tree</a></h3> 5429 5430 <p>Functions are provided for reading and writing the document content. Here 5431 is an excerpt from the <a href="html/libxml-tree.html">tree API</a>:</p> 5432 <dl> 5433 <dt><code>xmlAttrPtr xmlSetProp(xmlNodePtr node, const xmlChar *name, const 5434 xmlChar *value);</code></dt> 5435 <dd><p>This sets (or changes) an attribute carried by an ELEMENT node. 5436 The value can be NULL.</p> 5437 </dd> 5438 </dl> 5439 <dl> 5440 <dt><code>const xmlChar *xmlGetProp(xmlNodePtr node, const xmlChar 5441 *name);</code></dt> 5442 <dd><p>This function returns a pointer to new copy of the property 5443 content. Note that the user must deallocate the result.</p> 5444 </dd> 5445 </dl> 5446 5447 <p>Two functions are provided for reading and writing the text associated 5448 with elements:</p> 5449 <dl> 5450 <dt><code>xmlNodePtr xmlStringGetNodeList(xmlDocPtr doc, const xmlChar 5451 *value);</code></dt> 5452 <dd><p>This function takes an "external" string and converts it to one 5453 text node or possibly to a list of entity and text nodes. All 5454 non-predefined entity references like &Gnome; will be stored 5455 internally as entity nodes, hence the result of the function may not be 5456 a single node.</p> 5457 </dd> 5458 </dl> 5459 <dl> 5460 <dt><code>xmlChar *xmlNodeListGetString(xmlDocPtr doc, xmlNodePtr list, int 5461 inLine);</code></dt> 5462 <dd><p>This function is the inverse of 5463 <code>xmlStringGetNodeList()</code>. It generates a new string 5464 containing the content of the text and entity nodes. Note the extra 5465 argument inLine. If this argument is set to 1, the function will expand 5466 entity references. For example, instead of returning the &Gnome; 5467 XML encoding in the string, it will substitute it with its value (say, 5468 "GNU Network Object Model Environment").</p> 5469 </dd> 5470 </dl> 5471 5472 <h3><a name="Saving">Saving a tree</a></h3> 5473 5474 <p>Basically 3 options are possible:</p> 5475 <dl> 5476 <dt><code>void xmlDocDumpMemory(xmlDocPtr cur, xmlChar**mem, int 5477 *size);</code></dt> 5478 <dd><p>Returns a buffer into which the document has been saved.</p> 5479 </dd> 5480 </dl> 5481 <dl> 5482 <dt><code>extern void xmlDocDump(FILE *f, xmlDocPtr doc);</code></dt> 5483 <dd><p>Dumps a document to an open file descriptor.</p> 5484 </dd> 5485 </dl> 5486 <dl> 5487 <dt><code>int xmlSaveFile(const char *filename, xmlDocPtr cur);</code></dt> 5488 <dd><p>Saves the document to a file. In this case, the compression 5489 interface is triggered if it has been turned on.</p> 5490 </dd> 5491 </dl> 5492 5493 <h3><a name="Compressio">Compression</a></h3> 5494 5495 <p>The library transparently handles compression when doing file-based 5496 accesses. The level of compression on saves can be turned on either globally 5497 or individually for one file:</p> 5498 <dl> 5499 <dt><code>int xmlGetDocCompressMode (xmlDocPtr doc);</code></dt> 5500 <dd><p>Gets the document compression ratio (0-9).</p> 5501 </dd> 5502 </dl> 5503 <dl> 5504 <dt><code>void xmlSetDocCompressMode (xmlDocPtr doc, int mode);</code></dt> 5505 <dd><p>Sets the document compression ratio.</p> 5506 </dd> 5507 </dl> 5508 <dl> 5509 <dt><code>int xmlGetCompressMode(void);</code></dt> 5510 <dd><p>Gets the default compression ratio.</p> 5511 </dd> 5512 </dl> 5513 <dl> 5514 <dt><code>void xmlSetCompressMode(int mode);</code></dt> 5515 <dd><p>Sets the default compression ratio.</p> 5516 </dd> 5517 </dl> 5518 5519 <h2><a name="Entities">Entities or no entities</a></h2> 5520 5521 <p>Entities in principle are similar to simple C macros. An entity defines an 5522 abbreviation for a given string that you can reuse many times throughout the 5523 content of your document. Entities are especially useful when a given string 5524 may occur frequently within a document, or to confine the change needed to a 5525 document to a restricted area in the internal subset of the document (at the 5526 beginning). Example:</p> 5527 <pre>1 <?xml version="1.0"?> 5528 2 <!DOCTYPE EXAMPLE SYSTEM "example.dtd" [ 5529 3 <!ENTITY xml "Extensible Markup Language"> 5530 4 ]> 5531 5 <EXAMPLE> 5532 6 &xml; 5533 7 </EXAMPLE></pre> 5534 5535 <p>Line 3 declares the xml entity. Line 6 uses the xml entity, by prefixing 5536 its name with '&' and following it by ';' without any spaces added. There 5537 are 5 predefined entities in libxml2 allowing you to escape characters with 5538 predefined meaning in some parts of the xml document content: 5539 <strong>&lt;</strong> for the character '<', <strong>&gt;</strong> 5540 for the character '>', <strong>&apos;</strong> for the character ''', 5541 <strong>&quot;</strong> for the character '"', and 5542 <strong>&amp;</strong> for the character '&'.</p> 5543 5544 <p>One of the problems related to entities is that you may want the parser to 5545 substitute an entity's content so that you can see the replacement text in 5546 your application. Or you may prefer to keep entity references as such in the 5547 content to be able to save the document back without losing this usually 5548 precious information (if the user went through the pain of explicitly 5549 defining entities, he may have a a rather negative attitude if you blindly 5550 substitute them as saving time). The <a 5551 href="html/libxml-parser.html#xmlSubstituteEntitiesDefault">xmlSubstituteEntitiesDefault()</a> 5552 function allows you to check and change the behaviour, which is to not 5553 substitute entities by default.</p> 5554 5555 <p>Here is the DOM tree built by libxml2 for the previous document in the 5556 default case:</p> 5557 <pre>/gnome/src/gnome-xml -> ./xmllint --debug test/ent1 5558 DOCUMENT 5559 version=1.0 5560 ELEMENT EXAMPLE 5561 TEXT 5562 content= 5563 ENTITY_REF 5564 INTERNAL_GENERAL_ENTITY xml 5565 content=Extensible Markup Language 5566 TEXT 5567 content=</pre> 5568 5569 <p>And here is the result when substituting entities:</p> 5570 <pre>/gnome/src/gnome-xml -> ./tester --debug --noent test/ent1 5571 DOCUMENT 5572 version=1.0 5573 ELEMENT EXAMPLE 5574 TEXT 5575 content= Extensible Markup Language</pre> 5576 5577 <p>So, entities or no entities? Basically, it depends on your use case. I 5578 suggest that you keep the non-substituting default behaviour and avoid using 5579 entities in your XML document or data if you are not willing to handle the 5580 entity references elements in the DOM tree.</p> 5581 5582 <p>Note that at save time libxml2 enforces the conversion of the predefined 5583 entities where necessary to prevent well-formedness problems, and will also 5584 transparently replace those with chars (i.e. it will not generate entity 5585 reference elements in the DOM tree or call the reference() SAX callback when 5586 finding them in the input).</p> 5587 5588 <p><span style="background-color: #FF0000">WARNING</span>: handling entities 5589 on top of the libxml2 SAX interface is difficult!!! If you plan to use 5590 non-predefined entities in your documents, then the learning curve to handle 5591 then using the SAX API may be long. If you plan to use complex documents, I 5592 strongly suggest you consider using the DOM interface instead and let libxml 5593 deal with the complexity rather than trying to do it yourself.</p> 5594 5595 <h2><a name="Namespaces">Namespaces</a></h2> 5596 5597 <p>The libxml2 library implements <a 5598 href="http://www.w3.org/TR/REC-xml-names/">XML namespaces</a> support by 5599 recognizing namespace constructs in the input, and does namespace lookup 5600 automatically when building the DOM tree. A namespace declaration is 5601 associated with an in-memory structure and all elements or attributes within 5602 that namespace point to it. Hence testing the namespace is a simple and fast 5603 equality operation at the user level.</p> 5604 5605 <p>I suggest that people using libxml2 use a namespace, and declare it in the 5606 root element of their document as the default namespace. Then they don't need 5607 to use the prefix in the content but we will have a basis for future semantic 5608 refinement and merging of data from different sources. This doesn't increase 5609 the size of the XML output significantly, but significantly increases its 5610 value in the long-term. Example:</p> 5611 <pre><mydoc xmlns="http://mydoc.example.org/schemas/"> 5612 <elem1>...</elem1> 5613 <elem2>...</elem2> 5614 </mydoc></pre> 5615 5616 <p>The namespace value has to be an absolute URL, but the URL doesn't have to 5617 point to any existing resource on the Web. It will bind all the element and 5618 attributes with that URL. I suggest to use an URL within a domain you 5619 control, and that the URL should contain some kind of version information if 5620 possible. For example, <code>"http://www.gnome.org/gnumeric/1.0/"</code> is a 5621 good namespace scheme.</p> 5622 5623 <p>Then when you load a file, make sure that a namespace carrying the 5624 version-independent prefix is installed on the root element of your document, 5625 and if the version information don't match something you know, warn the user 5626 and be liberal in what you accept as the input. Also do *not* try to base 5627 namespace checking on the prefix value. <foo:text> may be exactly the 5628 same as <bar:text> in another document. What really matters is the URI 5629 associated with the element or the attribute, not the prefix string (which is 5630 just a shortcut for the full URI). In libxml, element and attributes have an 5631 <code>ns</code> field pointing to an xmlNs structure detailing the namespace 5632 prefix and its URI.</p> 5633 5634 <p>@@Interfaces@@</p> 5635 <pre>xmlNodePtr node; 5636 if(!strncmp(node->name,"mytag",5) 5637 && node->ns 5638 && !strcmp(node->ns->href,"http://www.mysite.com/myns/1.0")) { 5639 ... 5640 }</pre> 5641 5642 <p>Usually people object to using namespaces together with validity checking. 5643 I will try to make sure that using namespaces won't break validity checking, 5644 so even if you plan to use or currently are using validation I strongly 5645 suggest adding namespaces to your document. A default namespace scheme 5646 <code>xmlns="http://...."</code> should not break validity even on less 5647 flexible parsers. Using namespaces to mix and differentiate content coming 5648 from multiple DTDs will certainly break current validation schemes. To check 5649 such documents one needs to use schema-validation, which is supported in 5650 libxml2 as well. See <a href="http://www.relaxng.org/">relagx-ng</a> and <a 5651 href="http://www.w3c.org/XML/Schema">w3c-schema</a>.</p> 5652 5653 <h2><a name="Upgrading">Upgrading 1.x code</a></h2> 5654 5655 <p>Incompatible changes:</p> 5656 5657 <p>Version 2 of libxml2 is the first version introducing serious backward 5658 incompatible changes. The main goals were:</p> 5659 <ul> 5660 <li>a general cleanup. A number of mistakes inherited from the very early 5661 versions couldn't be changed due to compatibility constraints. Example 5662 the "childs" element in the nodes.</li> 5663 <li>Uniformization of the various nodes, at least for their header and link 5664 parts (doc, parent, children, prev, next), the goal is a simpler 5665 programming model and simplifying the task of the DOM implementors.</li> 5666 <li>better conformances to the XML specification, for example version 1.x 5667 had an heuristic to try to detect ignorable white spaces. As a result the 5668 SAX event generated were ignorableWhitespace() while the spec requires 5669 character() in that case. This also mean that a number of DOM node 5670 containing blank text may populate the DOM tree which were not present 5671 before.</li> 5672 </ul> 5673 5674 <h3>How to fix libxml-1.x code:</h3> 5675 5676 <p>So client code of libxml designed to run with version 1.x may have to be 5677 changed to compile against version 2.x of libxml. Here is a list of changes 5678 that I have collected, they may not be sufficient, so in case you find other 5679 change which are required, <a href="mailto:Daniel.Veillard (a] w3.org">drop me a 5680 mail</a>:</p> 5681 <ol> 5682 <li>The package name have changed from libxml to libxml2, the library name 5683 is now -lxml2 . There is a new xml2-config script which should be used to 5684 select the right parameters libxml2</li> 5685 <li>Node <strong>childs</strong> field has been renamed 5686 <strong>children</strong> so s/childs/children/g should be applied 5687 (probability of having "childs" anywhere else is close to 0+</li> 5688 <li>The document don't have anymore a <strong>root</strong> element it has 5689 been replaced by <strong>children</strong> and usually you will get a 5690 list of element here. For example a Dtd element for the internal subset 5691 and it's declaration may be found in that list, as well as processing 5692 instructions or comments found before or after the document root element. 5693 Use <strong>xmlDocGetRootElement(doc)</strong> to get the root element of 5694 a document. Alternatively if you are sure to not reference DTDs nor have 5695 PIs or comments before or after the root element 5696 s/->root/->children/g will probably do it.</li> 5697 <li>The white space issue, this one is more complex, unless special case of 5698 validating parsing, the line breaks and spaces usually used for indenting 5699 and formatting the document content becomes significant. So they are 5700 reported by SAX and if your using the DOM tree, corresponding nodes are 5701 generated. Too approach can be taken: 5702 <ol> 5703 <li>lazy one, use the compatibility call 5704 <strong>xmlKeepBlanksDefault(0)</strong> but be aware that you are 5705 relying on a special (and possibly broken) set of heuristics of 5706 libxml to detect ignorable blanks. Don't complain if it breaks or 5707 make your application not 100% clean w.r.t. to it's input.</li> 5708 <li>the Right Way: change you code to accept possibly insignificant 5709 blanks characters, or have your tree populated with weird blank text 5710 nodes. You can spot them using the commodity function 5711 <strong>xmlIsBlankNode(node)</strong> returning 1 for such blank 5712 nodes.</li> 5713 </ol> 5714 <p>Note also that with the new default the output functions don't add any 5715 extra indentation when saving a tree in order to be able to round trip 5716 (read and save) without inflating the document with extra formatting 5717 chars.</p> 5718 </li> 5719 <li>The include path has changed to $prefix/libxml/ and the includes 5720 themselves uses this new prefix in includes instructions... If you are 5721 using (as expected) the 5722 <pre>xml2-config --cflags</pre> 5723 <p>output to generate you compile commands this will probably work out of 5724 the box</p> 5725 </li> 5726 <li>xmlDetectCharEncoding takes an extra argument indicating the length in 5727 byte of the head of the document available for character detection.</li> 5728 </ol> 5729 5730 <h3>Ensuring both libxml-1.x and libxml-2.x compatibility</h3> 5731 5732 <p>Two new version of libxml (1.8.11) and libxml2 (2.3.4) have been released 5733 to allow smooth upgrade of existing libxml v1code while retaining 5734 compatibility. They offers the following:</p> 5735 <ol> 5736 <li>similar include naming, one should use 5737 <strong>#include<libxml/...></strong> in both cases.</li> 5738 <li>similar identifiers defined via macros for the child and root fields: 5739 respectively <strong>xmlChildrenNode</strong> and 5740 <strong>xmlRootNode</strong></li> 5741 <li>a new macro <strong>LIBXML_TEST_VERSION</strong> which should be 5742 inserted once in the client code</li> 5743 </ol> 5744 5745 <p>So the roadmap to upgrade your existing libxml applications is the 5746 following:</p> 5747 <ol> 5748 <li>install the libxml-1.8.8 (and libxml-devel-1.8.8) packages</li> 5749 <li>find all occurrences where the xmlDoc <strong>root</strong> field is 5750 used and change it to <strong>xmlRootNode</strong></li> 5751 <li>similarly find all occurrences where the xmlNode 5752 <strong>childs</strong> field is used and change it to 5753 <strong>xmlChildrenNode</strong></li> 5754 <li>add a <strong>LIBXML_TEST_VERSION</strong> macro somewhere in your 5755 <strong>main()</strong> or in the library init entry point</li> 5756 <li>Recompile, check compatibility, it should still work</li> 5757 <li>Change your configure script to look first for xml2-config and fall 5758 back using xml-config . Use the --cflags and --libs output of the command 5759 as the Include and Linking parameters needed to use libxml.</li> 5760 <li>install libxml2-2.3.x and libxml2-devel-2.3.x (libxml-1.8.y and 5761 libxml-devel-1.8.y can be kept simultaneously)</li> 5762 <li>remove your config.cache, relaunch your configuration mechanism, and 5763 recompile, if steps 2 and 3 were done right it should compile as-is</li> 5764 <li>Test that your application is still running correctly, if not this may 5765 be due to extra empty nodes due to formating spaces being kept in libxml2 5766 contrary to libxml1, in that case insert xmlKeepBlanksDefault(1) in your 5767 code before calling the parser (next to 5768 <strong>LIBXML_TEST_VERSION</strong> is a fine place).</li> 5769 </ol> 5770 5771 <p>Following those steps should work. It worked for some of my own code.</p> 5772 5773 <p>Let me put some emphasis on the fact that there is far more changes from 5774 libxml 1.x to 2.x than the ones you may have to patch for. The overall code 5775 has been considerably cleaned up and the conformance to the XML specification 5776 has been drastically improved too. Don't take those changes as an excuse to 5777 not upgrade, it may cost a lot on the long term ...</p> 5778 5779 <h2><a name="Thread">Thread safety</a></h2> 5780 5781 <p>Starting with 2.4.7, libxml2 makes provisions to ensure that concurrent 5782 threads can safely work in parallel parsing different documents. There is 5783 however a couple of things to do to ensure it:</p> 5784 <ul> 5785 <li>configure the library accordingly using the --with-threads options</li> 5786 <li>call xmlInitParser() in the "main" thread before using any of the 5787 libxml2 API (except possibly selecting a different memory allocator)</li> 5788 </ul> 5789 5790 <p>Note that the thread safety cannot be ensured for multiple threads sharing 5791 the same document, the locking must be done at the application level, libxml 5792 exports a basic mutex and reentrant mutexes API in <libxml/threads.h>. 5793 The parts of the library checked for thread safety are:</p> 5794 <ul> 5795 <li>concurrent loading</li> 5796 <li>file access resolution</li> 5797 <li>catalog access</li> 5798 <li>catalog building</li> 5799 <li>entities lookup/accesses</li> 5800 <li>validation</li> 5801 <li>global variables per-thread override</li> 5802 <li>memory handling</li> 5803 </ul> 5804 5805 <p>XPath has been tested for threaded usage on non-modified document 5806 for example when using libxslt, but make 100% sure the documents 5807 are accessed read-only !</p> 5808 5809 <h2><a name="DOM"></a><a name="Principles">DOM Principles</a></h2> 5810 5811 <p><a href="http://www.w3.org/DOM/">DOM</a> stands for the <em>Document 5812 Object Model</em>; this is an API for accessing XML or HTML structured 5813 documents. Native support for DOM in Gnome is on the way (module gnome-dom), 5814 and will be based on gnome-xml. This will be a far cleaner interface to 5815 manipulate XML files within Gnome since it won't expose the internal 5816 structure.</p> 5817 5818 <p>The current DOM implementation on top of libxml2 is the <a 5819 href="http://svn.gnome.org/viewvc/gdome2/trunk/">gdome2 Gnome module</a>, this 5820 is a full DOM interface, thanks to Paolo Casarini, check the <a 5821 href="http://gdome2.cs.unibo.it/">Gdome2 homepage</a> for more 5822 information.</p> 5823 5824 <h2><a name="Example"></a><a name="real">A real example</a></h2> 5825 5826 <p>Here is a real size example, where the actual content of the application 5827 data is not kept in the DOM tree but uses internal structures. It is based on 5828 a proposal to keep a database of jobs related to Gnome, with an XML based 5829 storage structure. Here is an <a href="gjobs.xml">XML encoded jobs 5830 base</a>:</p> 5831 <pre><?xml version="1.0"?> 5832 <gjob:Helping xmlns:gjob="http://www.gnome.org/some-location"> 5833 <gjob:Jobs> 5834 5835 <gjob:Job> 5836 <gjob:Project ID="3"/> 5837 <gjob:Application>GBackup</gjob:Application> 5838 <gjob:Category>Development</gjob:Category> 5839 5840 <gjob:Update> 5841 <gjob:Status>Open</gjob:Status> 5842 <gjob:Modified>Mon, 07 Jun 1999 20:27:45 -0400 MET DST</gjob:Modified> 5843 <gjob:Salary>USD 0.00</gjob:Salary> 5844 </gjob:Update> 5845 5846 <gjob:Developers> 5847 <gjob:Developer> 5848 </gjob:Developer> 5849 </gjob:Developers> 5850 5851 <gjob:Contact> 5852 <gjob:Person>Nathan Clemons</gjob:Person> 5853 <gjob:Email>nathan (a] windsofstorm.net</gjob:Email> 5854 <gjob:Company> 5855 </gjob:Company> 5856 <gjob:Organisation> 5857 </gjob:Organisation> 5858 <gjob:Webpage> 5859 </gjob:Webpage> 5860 <gjob:Snailmail> 5861 </gjob:Snailmail> 5862 <gjob:Phone> 5863 </gjob:Phone> 5864 </gjob:Contact> 5865 5866 <gjob:Requirements> 5867 The program should be released as free software, under the GPL. 5868 </gjob:Requirements> 5869 5870 <gjob:Skills> 5871 </gjob:Skills> 5872 5873 <gjob:Details> 5874 A GNOME based system that will allow a superuser to configure 5875 compressed and uncompressed files and/or file systems to be backed 5876 up with a supported media in the system. This should be able to 5877 perform via find commands generating a list of files that are passed 5878 to tar, dd, cpio, cp, gzip, etc., to be directed to the tape machine 5879 or via operations performed on the filesystem itself. Email 5880 notification and GUI status display very important. 5881 </gjob:Details> 5882 5883 </gjob:Job> 5884 5885 </gjob:Jobs> 5886 </gjob:Helping></pre> 5887 5888 <p>While loading the XML file into an internal DOM tree is a matter of 5889 calling only a couple of functions, browsing the tree to gather the data and 5890 generate the internal structures is harder, and more error prone.</p> 5891 5892 <p>The suggested principle is to be tolerant with respect to the input 5893 structure. For example, the ordering of the attributes is not significant, 5894 the XML specification is clear about it. It's also usually a good idea not to 5895 depend on the order of the children of a given node, unless it really makes 5896 things harder. Here is some code to parse the information for a person:</p> 5897 <pre>/* 5898 * A person record 5899 */ 5900 typedef struct person { 5901 char *name; 5902 char *email; 5903 char *company; 5904 char *organisation; 5905 char *smail; 5906 char *webPage; 5907 char *phone; 5908 } person, *personPtr; 5909 5910 /* 5911 * And the code needed to parse it 5912 */ 5913 personPtr parsePerson(xmlDocPtr doc, xmlNsPtr ns, xmlNodePtr cur) { 5914 personPtr ret = NULL; 5915 5916 DEBUG("parsePerson\n"); 5917 /* 5918 * allocate the struct 5919 */ 5920 ret = (personPtr) malloc(sizeof(person)); 5921 if (ret == NULL) { 5922 fprintf(stderr,"out of memory\n"); 5923 return(NULL); 5924 } 5925 memset(ret, 0, sizeof(person)); 5926 5927 /* We don't care what the top level element name is */ 5928 cur = cur->xmlChildrenNode; 5929 while (cur != NULL) { 5930 if ((!strcmp(cur->name, "Person")) && (cur->ns == ns)) 5931 ret->name = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1); 5932 if ((!strcmp(cur->name, "Email")) && (cur->ns == ns)) 5933 ret->email = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1); 5934 cur = cur->next; 5935 } 5936 5937 return(ret); 5938 }</pre> 5939 5940 <p>Here are a couple of things to notice:</p> 5941 <ul> 5942 <li>Usually a recursive parsing style is the more convenient one: XML data 5943 is by nature subject to repetitive constructs and usually exhibits highly 5944 structured patterns.</li> 5945 <li>The two arguments of type <em>xmlDocPtr</em> and <em>xmlNsPtr</em>, 5946 i.e. the pointer to the global XML document and the namespace reserved to 5947 the application. Document wide information are needed for example to 5948 decode entities and it's a good coding practice to define a namespace for 5949 your application set of data and test that the element and attributes 5950 you're analyzing actually pertains to your application space. This is 5951 done by a simple equality test (cur->ns == ns).</li> 5952 <li>To retrieve text and attributes value, you can use the function 5953 <em>xmlNodeListGetString</em> to gather all the text and entity reference 5954 nodes generated by the DOM output and produce an single text string.</li> 5955 </ul> 5956 5957 <p>Here is another piece of code used to parse another level of the 5958 structure:</p> 5959 <pre>#include <libxml/tree.h> 5960 /* 5961 * a Description for a Job 5962 */ 5963 typedef struct job { 5964 char *projectID; 5965 char *application; 5966 char *category; 5967 personPtr contact; 5968 int nbDevelopers; 5969 personPtr developers[100]; /* using dynamic alloc is left as an exercise */ 5970 } job, *jobPtr; 5971 5972 /* 5973 * And the code needed to parse it 5974 */ 5975 jobPtr parseJob(xmlDocPtr doc, xmlNsPtr ns, xmlNodePtr cur) { 5976 jobPtr ret = NULL; 5977 5978 DEBUG("parseJob\n"); 5979 /* 5980 * allocate the struct 5981 */ 5982 ret = (jobPtr) malloc(sizeof(job)); 5983 if (ret == NULL) { 5984 fprintf(stderr,"out of memory\n"); 5985 return(NULL); 5986 } 5987 memset(ret, 0, sizeof(job)); 5988 5989 /* We don't care what the top level element name is */ 5990 cur = cur->xmlChildrenNode; 5991 while (cur != NULL) { 5992 5993 if ((!strcmp(cur->name, "Project")) && (cur->ns == ns)) { 5994 ret->projectID = xmlGetProp(cur, "ID"); 5995 if (ret->projectID == NULL) { 5996 fprintf(stderr, "Project has no ID\n"); 5997 } 5998 } 5999 if ((!strcmp(cur->name, "Application")) && (cur->ns == ns)) 6000 ret->application = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1); 6001 if ((!strcmp(cur->name, "Category")) && (cur->ns == ns)) 6002 ret->category = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1); 6003 if ((!strcmp(cur->name, "Contact")) && (cur->ns == ns)) 6004 ret->contact = parsePerson(doc, ns, cur); 6005 cur = cur->next; 6006 } 6007 6008 return(ret); 6009 }</pre> 6010 6011 <p>Once you are used to it, writing this kind of code is quite simple, but 6012 boring. Ultimately, it could be possible to write stubbers taking either C 6013 data structure definitions, a set of XML examples or an XML DTD and produce 6014 the code needed to import and export the content between C data and XML 6015 storage. This is left as an exercise to the reader :-)</p> 6016 6017 <p>Feel free to use <a href="example/gjobread.c">the code for the full C 6018 parsing example</a> as a template, it is also available with Makefile in the 6019 Gnome SVN base under libxml2/example</p> 6020 6021 <h2><a name="Contributi">Contributions</a></h2> 6022 <ul> 6023 <li>Bjorn Reese, William Brack and Thomas Broyer have provided a number of 6024 patches, Gary Pennington worked on the validation API, threading support 6025 and Solaris port.</li> 6026 <li>John Fleck helps maintaining the documentation and man pages.</li> 6027 <li><a href="mailto:igor (a] zlatkovic.com">Igor Zlatkovic</a> is now the 6028 maintainer of the Windows port, <a 6029 href="http://www.zlatkovic.com/projects/libxml/index.html">he provides 6030 binaries</a></li> 6031 <li><a href="mailto:Gary.Pennington (a] sun.com">Gary Pennington</a> provides 6032 <a href="http://garypennington.net/libxml2/">Solaris binaries</a></li> 6033 <li><a 6034 href="http://mail.gnome.org/archives/xml/2001-March/msg00014.html">Matt 6035 Sergeant</a> developed <a 6036 href="http://axkit.org/download/">XML::LibXSLT</a>, a Perl wrapper for 6037 libxml2/libxslt as part of the <a href="http://axkit.com/">AxKit XML 6038 application server</a></li> 6039 <li><a href="mailto:fnatter (a] gmx.net">Felix Natter</a> and <a 6040 href="mailto:geertk (a] ai.rug.nl">Geert Kloosterman</a> provide <a 6041 href="libxml-doc.el">an emacs module</a> to lookup libxml(2) functions 6042 documentation</li> 6043 <li><a href="mailto:sherwin (a] nlm.nih.gov">Ziying Sherwin</a> provided <a 6044 href="http://xmlsoft.org/messages/0488.html">man pages</a></li> 6045 <li>there is a module for <a 6046 href="http://acs-misc.sourceforge.net/nsxml.html">libxml/libxslt support 6047 in OpenNSD/AOLServer</a></li> 6048 <li><a href="mailto:dkuhlman (a] cutter.rexx.com">Dave Kuhlman</a> provided the 6049 first version of libxml/libxslt <a 6050 href="http://www.rexx.com/~dkuhlman">wrappers for Python</a></li> 6051 <li>Petr Kozelka provides <a 6052 href="http://sourceforge.net/projects/libxml2-pas">Pascal units to glue 6053 libxml2</a> with Kylix and Delphi and other Pascal compilers</li> 6054 <li><a href="mailto:aleksey (a] aleksey.com">Aleksey Sanin</a> implemented the 6055 <a href="http://www.w3.org/Signature/">XML Canonicalization and XML 6056 Digital Signature</a> <a 6057 href="http://www.aleksey.com/xmlsec/">implementations for libxml2</a></li> 6058 <li><a href="mailto:Steve.Ball (a] explain.com.au">Steve Ball</a> and 6059 contributors maintain <a href="http://tclxml.sourceforge.net/">tcl 6060 bindings for libxml2 and libxslt</a>, as well as <a 6061 href="http://tclxml.sf.net/tkxmllint.html">tkxmllint</a> a GUI for 6062 xmllint and <a href="http://tclxml.sf.net/tkxsltproc.html">tkxsltproc</a> 6063 a GUI for xsltproc.</li> 6064 </ul> 6065 6066 <p></p> 6067 </body> 6068 </html> 6069
