1 #8.2.4 Tokenization Table of contents 8.4 Serializing HTML fragments 2 3 WHATWG 4 5 HTML 5 6 7 Draft Recommendation 13 January 2009 8 9 8.2.4 Tokenization Table of contents 8.4 Serializing HTML 10 fragments 11 12 8.2.5 Tree construction 13 14 The input to the tree construction stage is a sequence of tokens from 15 the tokenization stage. The tree construction stage is associated with 16 a DOM Document object when a parser is created. The "output" of this 17 stage consists of dynamically modifying or extending that document's 18 DOM tree. 19 20 This specification does not define when an interactive user agent has 21 to render the Document so that it is available to the user, or when it 22 has to begin accepting user input. 23 24 As each token is emitted from the tokeniser, the user agent must 25 process the token according to the rules given in the section 26 corresponding to the current insertion mode. 27 28 When the steps below require the UA to insert a character into a node, 29 if that node has a child immediately before where the character is to 30 be inserted, and that child is a Text node, and that Text node was the 31 last node that the parser inserted into the document, then the 32 character must be appended to that Text node; otherwise, a new Text 33 node whose data is just that character must be inserted in the 34 appropriate place. 35 36 DOM mutation events must not fire for changes caused by the UA parsing 37 the document. (Conceptually, the parser is not mutating the DOM, it is 38 constructing it.) This includes the parsing of any content inserted 39 using document.write() and document.writeln() calls. [DOM3EVENTS] 40 41 Not all of the tag names mentioned below are conformant tag names in 42 this specification; many are included to handle legacy content. They 43 still form part of the algorithm that implementations are required to 44 implement to claim conformance. 45 46 The algorithm described below places no limit on the depth of the DOM 47 tree generated, or on the length of tag names, attribute names, 48 attribute values, text nodes, etc. While implementors are encouraged to 49 avoid arbitrary limits, it is recognized that practical concerns will 50 likely force user agents to impose nesting depths. 51 52 8.2.5.1 Creating and inserting elements 53 54 When the steps below require the UA to create an element for a token in 55 a particular namespace, the UA must create a node implementing the 56 interface appropriate for the element type corresponding to the tag 57 name of the token in the given namespace (as given in the specification 58 that defines that element, e.g. for an a element in the HTML namespace, 59 this specification defines it to be the HTMLAnchorElement interface), 60 with the tag name being the name of that element, with the node being 61 in the given namespace, and with the attributes on the node being those 62 given in the given token. 63 64 The interface appropriate for an element in the HTML namespace that is 65 not defined in this specification is HTMLElement. The interface 66 appropriate for an element in another namespace that is not defined by 67 that namespace's specification is Element. 68 69 When a resettable element is created in this manner, its reset 70 algorithm must be invoked once the attributes are set. (This 71 initializes the element's value and checkedness based on the element's 72 attributes.) 73 __________________________________________________________________ 74 75 When the steps below require the UA to insert an HTML element for a 76 token, the UA must first create an element for the token in the HTML 77 namespace, and then append this node to the current node, and push it 78 onto the stack of open elements so that it is the new current node. 79 80 The steps below may also require that the UA insert an HTML element in 81 a particular place, in which case the UA must follow the same steps 82 except that it must insert or append the new node in the location 83 specified instead of appending it to the current node. (This happens in 84 particular during the parsing of tables with invalid content.) 85 86 If an element created by the insert an HTML element algorithm is a 87 form-associated element, and the form element pointer is not null, and 88 the newly created element doesn't have a form attribute, the user agent 89 must associate the newly created element with the form element pointed 90 to by the form element pointer before inserting it wherever it is to be 91 inserted. 92 __________________________________________________________________ 93 94 When the steps below require the UA to insert a foreign element for a 95 token, the UA must first create an element for the token in the given 96 namespace, and then append this node to the current node, and push it 97 onto the stack of open elements so that it is the new current node. If 98 the newly created element has an xmlns attribute in the XMLNS namespace 99 whose value is not exactly the same as the element's namespace, that is 100 a parse error. 101 102 When the steps below require the user agent to adjust MathML attributes 103 for a token, then, if the token has an attribute named definitionurl, 104 change its name to definitionURL (note the case difference). 105 106 When the steps below require the user agent to adjust foreign 107 attributes for a token, then, if any of the attributes on the token 108 match the strings given in the first column of the following table, let 109 the attribute be a namespaced attribute, with the prefix being the 110 string given in the corresponding cell in the second column, the local 111 name being the string given in the corresponding cell in the third 112 column, and the namespace being the namespace given in the 113 corresponding cell in the fourth column. (This fixes the use of 114 namespaced attributes, in particular xml:lang.) 115 116 Attribute name Prefix Local name Namespace 117 xlink:actuate xlink actuate XLink namespace 118 xlink:arcrole xlink arcrole XLink namespace 119 xlink:href xlink href XLink namespace 120 xlink:role xlink role XLink namespace 121 xlink:show xlink show XLink namespace 122 xlink:title xlink title XLink namespace 123 xlink:type xlink type XLink namespace 124 xml:base xml base XML namespace 125 xml:lang xml lang XML namespace 126 xml:space xml space XML namespace 127 xmlns (none) xmlns XMLNS namespace 128 xmlns:xlink xmlns xlink XMLNS namespace 129 __________________________________________________________________ 130 131 The generic CDATA element parsing algorithm and the generic RCDATA 132 element parsing algorithm consist of the following steps. These 133 algorithms are always invoked in response to a start tag token. 134 1. Insert an HTML element for the token. 135 2. If the algorithm that was invoked is the generic CDATA element 136 parsing algorithm, switch the tokeniser's content model flag to the 137 CDATA state; otherwise the algorithm invoked was the generic RCDATA 138 element parsing algorithm, switch the tokeniser's content model 139 flag to the RCDATA state. 140 3. Let the original insertion mode be the current insertion mode. 141 4. Then, switch the insertion mode to "in CDATA/RCDATA". 142 143 8.2.5.2 Closing elements that have implied end tags 144 145 When the steps below require the UA to generate implied end tags, then, 146 while the current node is a dd element, a dt element, an li element, an 147 option element, an optgroup element, a p element, an rp element, or an 148 rt element, the UA must pop the current node off the stack of open 149 elements. 150 151 If a step requires the UA to generate implied end tags but lists an 152 element to exclude from the process, then the UA must perform the above 153 steps as if that element was not in the above list. 154 155 8.2.5.3 Foster parenting 156 157 Foster parenting happens when content is misnested in tables. 158 159 When a node node is to be foster parented, the node node must be 160 inserted into the foster parent element, and the current table must be 161 marked as tainted. (Once the current table has been tainted, whitespace 162 characters are inserted into the foster parent element instead of the 163 current node.) 164 165 The foster parent element is the parent element of the last table 166 element in the stack of open elements, if there is a table element and 167 it has such a parent element. If there is no table element in the stack 168 of open elements (fragment case), then the foster parent element is the 169 first element in the stack of open elements (the html element). 170 Otherwise, if there is a table element in the stack of open elements, 171 but the last table element in the stack of open elements has no parent, 172 or its parent node is not an element, then the foster parent element is 173 the element before the last table element in the stack of open 174 elements. 175 176 If the foster parent element is the parent element of the last table 177 element in the stack of open elements, then node must be inserted 178 immediately before the last table element in the stack of open elements 179 in the foster parent element; otherwise, node must be appended to the 180 foster parent element. 181 182 8.2.5.4 The "initial" insertion mode 183 184 When the insertion mode is "initial", tokens must be handled as 185 follows: 186 187 A character token that is one of one of U+0009 CHARACTER TABULATION, 188 U+000A LINE FEED (LF), U+000C FORM FEED (FF), or U+0020 SPACE 189 Ignore the token. 190 191 A comment token 192 Append a Comment node to the Document object with the data 193 attribute set to the data given in the comment token. 194 195 A DOCTYPE token 196 If the DOCTYPE token's name is not a case-sensitive match for 197 the string "html", or if the token's public identifier is 198 neither missing nor a case-sensitive match for the string 199 "XSLT-compat", or if the token's system identifier is not 200 missing, then there is a parse error (this is the DOCTYPE parse 201 error). Conformance checkers may, instead of reporting this 202 error, switch to a conformance checking mode for another 203 language (e.g. based on the DOCTYPE token a conformance checker 204 could recognize that the document is an HTML4-era document, and 205 defer to an HTML4 conformance checker.) 206 207 Append a DocumentType node to the Document node, with the name 208 attribute set to the name given in the DOCTYPE token; the 209 publicId attribute set to the public identifier given in the 210 DOCTYPE token, or the empty string if the public identifier was 211 missing; the systemId attribute set to the system identifier 212 given in the DOCTYPE token, or the empty string if the system 213 identifier was missing; and the other attributes specific to 214 DocumentType objects set to null and empty lists as appropriate. 215 Associate the DocumentType node with the Document object so that 216 it is returned as the value of the doctype attribute of the 217 Document object. 218 219 Then, if the DOCTYPE token matches one of the conditions in the 220 following list, then set the document to quirks mode: 221 222 + The force-quirks flag is set to on. 223 + The name is set to anything other than "HTML". 224 + The public identifier starts with: "+//Silmaril//dtd html Pro 225 v0r11 19970101//" 226 + The public identifier starts with: "-//AdvaSoft Ltd//DTD HTML 227 3.0 asWedit + extensions//" 228 + The public identifier starts with: "-//AS//DTD HTML 3.0 229 asWedit + extensions//" 230 + The public identifier starts with: "-//IETF//DTD HTML 2.0 231 Level 1//" 232 + The public identifier starts with: "-//IETF//DTD HTML 2.0 233 Level 2//" 234 + The public identifier starts with: "-//IETF//DTD HTML 2.0 235 Strict Level 1//" 236 + The public identifier starts with: "-//IETF//DTD HTML 2.0 237 Strict Level 2//" 238 + The public identifier starts with: "-//IETF//DTD HTML 2.0 239 Strict//" 240 + The public identifier starts with: "-//IETF//DTD HTML 2.0//" 241 + The public identifier starts with: "-//IETF//DTD HTML 2.1E//" 242 + The public identifier starts with: "-//IETF//DTD HTML 3.0//" 243 + The public identifier starts with: "-//IETF//DTD HTML 3.2 244 Final//" 245 + The public identifier starts with: "-//IETF//DTD HTML 3.2//" 246 + The public identifier starts with: "-//IETF//DTD HTML 3//" 247 + The public identifier starts with: "-//IETF//DTD HTML Level 248 0//" 249 + The public identifier starts with: "-//IETF//DTD HTML Level 250 1//" 251 + The public identifier starts with: "-//IETF//DTD HTML Level 252 2//" 253 + The public identifier starts with: "-//IETF//DTD HTML Level 254 3//" 255 + The public identifier starts with: "-//IETF//DTD HTML Strict 256 Level 0//" 257 + The public identifier starts with: "-//IETF//DTD HTML Strict 258 Level 1//" 259 + The public identifier starts with: "-//IETF//DTD HTML Strict 260 Level 2//" 261 + The public identifier starts with: "-//IETF//DTD HTML Strict 262 Level 3//" 263 + The public identifier starts with: "-//IETF//DTD HTML 264 Strict//" 265 + The public identifier starts with: "-//IETF//DTD HTML//" 266 + The public identifier starts with: "-//Metrius//DTD Metrius 267 Presentational//" 268 + The public identifier starts with: "-//Microsoft//DTD Internet 269 Explorer 2.0 HTML Strict//" 270 + The public identifier starts with: "-//Microsoft//DTD Internet 271 Explorer 2.0 HTML//" 272 + The public identifier starts with: "-//Microsoft//DTD Internet 273 Explorer 2.0 Tables//" 274 + The public identifier starts with: "-//Microsoft//DTD Internet 275 Explorer 3.0 HTML Strict//" 276 + The public identifier starts with: "-//Microsoft//DTD Internet 277 Explorer 3.0 HTML//" 278 + The public identifier starts with: "-//Microsoft//DTD Internet 279 Explorer 3.0 Tables//" 280 + The public identifier starts with: "-//Netscape Comm. 281 Corp.//DTD HTML//" 282 + The public identifier starts with: "-//Netscape Comm. 283 Corp.//DTD Strict HTML//" 284 + The public identifier starts with: "-//O'Reilly and 285 Associates//DTD HTML 2.0//" 286 + The public identifier starts with: "-//O'Reilly and 287 Associates//DTD HTML Extended 1.0//" 288 + The public identifier starts with: "-//O'Reilly and 289 Associates//DTD HTML Extended Relaxed 1.0//" 290 + The public identifier starts with: "-//SoftQuad Software//DTD 291 HoTMetaL PRO 6.0::19990601::extensions to HTML 4.0//" 292 + The public identifier starts with: "-//SoftQuad//DTD HoTMetaL 293 PRO 4.0::19971010::extensions to HTML 4.0//" 294 + The public identifier starts with: "-//Spyglass//DTD HTML 2.0 295 Extended//" 296 + The public identifier starts with: "-//SQ//DTD HTML 2.0 297 HoTMetaL + extensions//" 298 + The public identifier starts with: "-//Sun Microsystems 299 Corp.//DTD HotJava HTML//" 300 + The public identifier starts with: "-//Sun Microsystems 301 Corp.//DTD HotJava Strict HTML//" 302 + The public identifier starts with: "-//W3C//DTD HTML 3 303 1995-03-24//" 304 + The public identifier starts with: "-//W3C//DTD HTML 3.2 305 Draft//" 306 + The public identifier starts with: "-//W3C//DTD HTML 3.2 307 Final//" 308 + The public identifier starts with: "-//W3C//DTD HTML 3.2//" 309 + The public identifier starts with: "-//W3C//DTD HTML 3.2S 310 Draft//" 311 + The public identifier starts with: "-//W3C//DTD HTML 4.0 312 Frameset//" 313 + The public identifier starts with: "-//W3C//DTD HTML 4.0 314 Transitional//" 315 + The public identifier starts with: "-//W3C//DTD HTML 316 Experimental 19960712//" 317 + The public identifier starts with: "-//W3C//DTD HTML 318 Experimental 970421//" 319 + The public identifier starts with: "-//W3C//DTD W3 HTML//" 320 + The public identifier starts with: "-//W3O//DTD W3 HTML 3.0//" 321 + The public identifier is set to: "-//W3O//DTD W3 HTML Strict 322 3.0//EN//" 323 + The public identifier starts with: "-//WebTechs//DTD Mozilla 324 HTML 2.0//" 325 + The public identifier starts with: "-//WebTechs//DTD Mozilla 326 HTML//" 327 + The public identifier is set to: "-/W3C/DTD HTML 4.0 328 Transitional/EN" 329 + The public identifier is set to: "HTML" 330 + The system identifier is set to: 331 "http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd" 332 + The system identifier is missing and the public identifier 333 starts with: "-//W3C//DTD HTML 4.01 Frameset//" 334 + The system identifier is missing and the public identifier 335 starts with: "-//W3C//DTD HTML 4.01 Transitional//" 336 337 Otherwise, if the DOCTYPE token matches one of the conditions in 338 the following list, then set the document to limited quirks 339 mode: 340 341 + The public identifier starts with: "-//W3C//DTD XHTML 1.0 342 Frameset//" 343 + The public identifier starts with: "-//W3C//DTD XHTML 1.0 344 Transitional//" 345 + The system identifier is not missing and the public identifier 346 starts with: "-//W3C//DTD HTML 4.01 Frameset//" 347 + The system identifier is not missing and the public identifier 348 starts with: "-//W3C//DTD HTML 4.01 Transitional//" 349 350 The name, system identifier, and public identifier strings must 351 be compared to the values given in the lists above in an ASCII 352 case-insensitive manner. A system identifier whose value is the 353 empty string is not considered missing for the purposes of the 354 conditions above. 355 356 Then, switch the insertion mode to "before html". 357 358 Anything else 359 Parse error. 360 361 Set the document to quirks mode. 362 363 Switch the insertion mode to "before html", then reprocess the 364 current token. 365 366 8.2.5.5 The "before html" insertion mode 367 368 When the insertion mode is "before html", tokens must be handled as 369 follows: 370 371 A DOCTYPE token 372 Parse error. Ignore the token. 373 374 A comment token 375 Append a Comment node to the Document object with the data 376 attribute set to the data given in the comment token. 377 378 A character token that is one of one of U+0009 CHARACTER TABULATION, 379 U+000A LINE FEED (LF), U+000C FORM FEED (FF), or U+0020 SPACE 380 Ignore the token. 381 382 A start tag whose tag name is "html" 383 Create an element for the token in the HTML namespace. Append it 384 to the Document object. Put this element in the stack of open 385 elements. 386 387 If the token has an attribute "manifest", then resolve the value 388 of that attribute to an absolute URL, and if that is successful, 389 run the application cache selection algorithm with the resulting 390 absolute URL. Otherwise, if there is no such attribute or 391 resolving it fails, run the application cache selection 392 algorithm with no manifest. The algorithm must be passed the 393 Document object. 394 395 Switch the insertion mode to "before head". 396 397 Anything else 398 Create an HTMLElement node with the tag name html, in the HTML 399 namespace. Append it to the Document object. Put this element in 400 the stack of open elements. 401 402 Run the application cache selection algorithm with no manifest, 403 passing it the Document object. 404 405 Switch the insertion mode to "before head", then reprocess the 406 current token. 407 408 Should probably make end tags be ignored, so that "</head><!-- 409 --><html>" puts the comment before the root node (or should we?) 410 411 The root element can end up being removed from the Document object, 412 e.g. by scripts; nothing in particular happens in such cases, content 413 continues being appended to the nodes as described in the next section. 414 415 8.2.5.6 The "before head" insertion mode 416 417 When the insertion mode is "before head", tokens must be handled as 418 follows: 419 420 A character token that is one of one of U+0009 CHARACTER TABULATION, 421 U+000A LINE FEED (LF), U+000C FORM FEED (FF), or U+0020 SPACE 422 Ignore the token. 423 424 A comment token 425 Append a Comment node to the current node with the data 426 attribute set to the data given in the comment token. 427 428 A DOCTYPE token 429 Parse error. Ignore the token. 430 431 A start tag whose tag name is "html" 432 Process the token using the rules for the "in body" insertion 433 mode. 434 435 A start tag whose tag name is "head" 436 Insert an HTML element for the token. 437 438 Set the head element pointer to the newly created head element. 439 440 Switch the insertion mode to "in head". 441 442 An end tag whose tag name is one of: "head", "br" 443 Act as if a start tag token with the tag name "head" and no 444 attributes had been seen, then reprocess the current token. 445 446 Any other end tag 447 Parse error. Ignore the token. 448 449 Anything else 450 Act as if a start tag token with the tag name "head" and no 451 attributes had been seen, then reprocess the current token. 452 453 This will result in an empty head element being generated, with 454 the current token being reprocessed in the "after head" 455 insertion mode. 456 457 8.2.5.7 The "in head" insertion mode 458 459 When the insertion mode is "in head", tokens must be handled as 460 follows: 461 462 A character token that is one of one of U+0009 CHARACTER TABULATION, 463 U+000A LINE FEED (LF), U+000C FORM FEED (FF), or U+0020 SPACE 464 Insert the character into the current node. 465 466 A comment token 467 Append a Comment node to the current node with the data 468 attribute set to the data given in the comment token. 469 470 A DOCTYPE token 471 Parse error. Ignore the token. 472 473 A start tag whose tag name is "html" 474 Process the token using the rules for the "in body" insertion 475 mode. 476 477 A start tag whose tag name is one of: "base", "command", "eventsource", 478 "link" 479 Insert an HTML element for the token. Immediately pop the 480 current node off the stack of open elements. 481 482 Acknowledge the token's self-closing flag, if it is set. 483 484 A start tag whose tag name is "meta" 485 Insert an HTML element for the token. Immediately pop the 486 current node off the stack of open elements. 487 488 Acknowledge the token's self-closing flag, if it is set. 489 490 If the element has a charset attribute, and its value is a 491 supported encoding, and the confidence is currently tentative, 492 then change the encoding to the encoding given by the value of 493 the charset attribute. 494 495 Otherwise, if the element has a content attribute, and applying 496 the algorithm for extracting an encoding from a Content-Type to 497 its value returns a supported encoding encoding, and the 498 confidence is currently tentative, then change the encoding to 499 the encoding encoding. 500 501 A start tag whose tag name is "title" 502 Follow the generic RCDATA element parsing algorithm. 503 504 A start tag whose tag name is "noscript", if the scripting flag is 505 enabled 506 507 A start tag whose tag name is one of: "noframes", "style" 508 Follow the generic CDATA element parsing algorithm. 509 510 A start tag whose tag name is "noscript", if the scripting flag is 511 disabled 512 Insert an HTML element for the token. 513 514 Switch the insertion mode to "in head noscript". 515 516 A start tag whose tag name is "script" 517 518 1. Create an element for the token in the HTML namespace. 519 2. Mark the element as being "parser-inserted". 520 This ensures that, if the script is external, any 521 document.write() calls in the script will execute in-line, 522 instead of blowing the document away, as would happen in most 523 other cases. It also prevents the script from executing until 524 the end tag is seen. 525 3. If the parser was originally created for the HTML fragment 526 parsing algorithm, then mark the script element as "already 527 executed". (fragment case) 528 4. Append the new element to the current node. 529 5. Switch the tokeniser's content model flag to the CDATA state. 530 6. Let the original insertion mode be the current insertion mode. 531 7. Switch the insertion mode to "in CDATA/RCDATA". 532 533 An end tag whose tag name is "head" 534 Pop the current node (which will be the head element) off the 535 stack of open elements. 536 537 Switch the insertion mode to "after head". 538 539 An end tag whose tag name is "br" 540 Act as described in the "anything else" entry below. 541 542 A start tag whose tag name is "head" 543 Any other end tag 544 Parse error. Ignore the token. 545 546 Anything else 547 Act as if an end tag token with the tag name "head" had been 548 seen, and reprocess the current token. 549 550 In certain UAs, some elements don't trigger the "in body" mode 551 straight away, but instead get put into the head. Do we want to 552 copy that? 553 554 8.2.5.8 The "in head noscript" insertion mode 555 556 When the insertion mode is "in head noscript", tokens must be handled 557 as follows: 558 559 A DOCTYPE token 560 Parse error. Ignore the token. 561 562 A start tag whose tag name is "html" 563 Process the token using the rules for the "in body" insertion 564 mode. 565 566 An end tag whose tag name is "noscript" 567 Pop the current node (which will be a noscript element) from the 568 stack of open elements; the new current node will be a head 569 element. 570 571 Switch the insertion mode to "in head". 572 573 A character token that is one of one of U+0009 CHARACTER TABULATION, 574 U+000A LINE FEED (LF), U+000C FORM FEED (FF), or U+0020 SPACE 575 576 A comment token 577 A start tag whose tag name is one of: "link", "meta", "noframes", 578 "style" 579 Process the token using the rules for the "in head" insertion 580 mode. 581 582 An end tag whose tag name is "br" 583 Act as described in the "anything else" entry below. 584 585 A start tag whose tag name is one of: "head", "noscript" 586 Any other end tag 587 Parse error. Ignore the token. 588 589 Anything else 590 Parse error. Act as if an end tag with the tag name "noscript" 591 had been seen and reprocess the current token. 592 593 8.2.5.9 The "after head" insertion mode 594 595 When the insertion mode is "after head", tokens must be handled as 596 follows: 597 598 A character token that is one of one of U+0009 CHARACTER TABULATION, 599 U+000A LINE FEED (LF), U+000C FORM FEED (FF), or U+0020 SPACE 600 Insert the character into the current node. 601 602 A comment token 603 Append a Comment node to the current node with the data 604 attribute set to the data given in the comment token. 605 606 A DOCTYPE token 607 Parse error. Ignore the token. 608 609 A start tag whose tag name is "html" 610 Process the token using the rules for the "in body" insertion 611 mode. 612 613 A start tag whose tag name is "body" 614 Insert an HTML element for the token. 615 616 Switch the insertion mode to "in body". 617 618 A start tag whose tag name is "frameset" 619 Insert an HTML element for the token. 620 621 Switch the insertion mode to "in frameset". 622 623 A start tag token whose tag name is one of: "base", "link", "meta", 624 "noframes", "script", "style", "title" 625 Parse error. 626 627 Push the node pointed to by the head element pointer onto the 628 stack of open elements. 629 630 Process the token using the rules for the "in head" insertion 631 mode. 632 633 Remove the node pointed to by the head element pointer from the 634 stack of open elements. 635 636 An end tag whose tag name is "br" 637 Act as described in the "anything else" entry below. 638 639 A start tag whose tag name is "head" 640 Any other end tag 641 Parse error. Ignore the token. 642 643 Anything else 644 Act as if a start tag token with the tag name "body" and no 645 attributes had been seen, and then reprocess the current token. 646 647 8.2.5.10 The "in body" insertion mode 648 649 When the insertion mode is "in body", tokens must be handled as 650 follows: 651 652 A character token 653 Reconstruct the active formatting elements, if any. 654 655 Insert the token's character into the current node. 656 657 A comment token 658 Append a Comment node to the current node with the data 659 attribute set to the data given in the comment token. 660 661 A DOCTYPE token 662 Parse error. Ignore the token. 663 664 A start tag whose tag name is "html" 665 Parse error. For each attribute on the token, check to see if 666 the attribute is already present on the top element of the stack 667 of open elements. If it is not, add the attribute and its 668 corresponding value to that element. 669 670 A start tag token whose tag name is one of: "base", "command", 671 "eventsource", "link", "meta", "noframes", "script", "style", 672 "title" 673 Process the token using the rules for the "in head" insertion 674 mode. 675 676 A start tag whose tag name is "body" 677 Parse error. 678 679 If the second element on the stack of open elements is not a 680 body element, or, if the stack of open elements has only one 681 node on it, then ignore the token. (fragment case) 682 683 Otherwise, for each attribute on the token, check to see if the 684 attribute is already present on the body element (the second 685 element) on the stack of open elements. If it is not, add the 686 attribute and its corresponding value to that element. 687 688 An end-of-file token 689 If there is a node in the stack of open elements that is not 690 either a dd element, a dt element, an li element, a p element, a 691 tbody element, a td element, a tfoot element, a th element, a 692 thead element, a tr element, the body element, or the html 693 element, then this is a parse error. 694 695 Stop parsing. 696 697 An end tag whose tag name is "body" 698 If the stack of open elements does not have a body element in 699 scope, this is a parse error; ignore the token. 700 701 Otherwise, if there is a node in the stack of open elements that 702 is not either a dd element, a dt element, an li element, a p 703 element, a tbody element, a td element, a tfoot element, a th 704 element, a thead element, a tr element, the body element, or the 705 html element, then this is a parse error. 706 707 Switch the insertion mode to "after body". 708 709 An end tag whose tag name is "html" 710 Act as if an end tag with tag name "body" had been seen, then, 711 if that token wasn't ignored, reprocess the current token. 712 713 The fake end tag token here can only be ignored in the fragment 714 case. 715 716 A start tag whose tag name is one of: "address", "article", "aside", 717 "blockquote", "center", "datagrid", "details", "dialog", "dir", 718 "div", "dl", "fieldset", "figure", "footer", "header", "menu", 719 "nav", "ol", "p", "section", "ul" 720 If the stack of open elements has a p element in scope, then act 721 as if an end tag with the tag name "p" had been seen. 722 723 Insert an HTML element for the token. 724 725 A start tag whose tag name is one of: "h1", "h2", "h3", "h4", "h5", 726 "h6" 727 If the stack of open elements has a p element in scope, then act 728 as if an end tag with the tag name "p" had been seen. 729 730 If the current node is an element whose tag name is one of "h1", 731 "h2", "h3", "h4", "h5", or "h6", then this is a parse error; pop 732 the current node off the stack of open elements. 733 734 Insert an HTML element for the token. 735 736 A start tag whose tag name is one of: "pre", "listing" 737 If the stack of open elements has a p element in scope, then act 738 as if an end tag with the tag name "p" had been seen. 739 740 Insert an HTML element for the token. 741 742 If the next token is a U+000A LINE FEED (LF) character token, 743 then ignore that token and move on to the next one. (Newlines at 744 the start of pre blocks are ignored as an authoring 745 convenience.) 746 747 A start tag whose tag name is "form" 748 If the form element pointer is not null, then this is a parse 749 error; ignore the token. 750 751 Otherwise: 752 753 If the stack of open elements has a p element in scope, then act 754 as if an end tag with the tag name "p" had been seen. 755 756 Insert an HTML element for the token, and set the form element 757 pointer to point to the element created. 758 759 A start tag whose tag name is "li" 760 Run the following algorithm: 761 762 1. Initialize node to be the current node (the bottommost node of 763 the stack). 764 2. If node is an li element, then act as if an end tag with the 765 tag name "li" had been seen, then jump to the last step. 766 3. If node is not in the formatting category, and is not in the 767 phrasing category, and is not an address, div, or p element, 768 then jump to the last step. 769 4. Otherwise, set node to the previous entry in the stack of open 770 elements and return to step 2. 771 5. This is the last step. 772 If the stack of open elements has a p element in scope, then 773 act as if an end tag with the tag name "p" had been seen. 774 Finally, insert an HTML element for the token. 775 776 A start tag whose tag name is one of: "dd", "dt" 777 Run the following algorithm: 778 779 1. Initialize node to be the current node (the bottommost node of 780 the stack). 781 2. If node is a dd or dt element, then act as if an end tag with 782 the same tag name as node had been seen, then jump to the last 783 step. 784 3. If node is not in the formatting category, and is not in the 785 phrasing category, and is not an address, div, or p element, 786 then jump to the last step. 787 4. Otherwise, set node to the previous entry in the stack of open 788 elements and return to step 2. 789 5. This is the last step. 790 If the stack of open elements has a p element in scope, then 791 act as if an end tag with the tag name "p" had been seen. 792 Finally, insert an HTML element for the token. 793 794 A start tag whose tag name is "plaintext" 795 If the stack of open elements has a p element in scope, then act 796 as if an end tag with the tag name "p" had been seen. 797 798 Insert an HTML element for the token. 799 800 Switch the content model flag to the PLAINTEXT state. 801 802 Once a start tag with the tag name "plaintext" has been seen, 803 that will be the last token ever seen other than character 804 tokens (and the end-of-file token), because there is no way to 805 switch the content model flag out of the PLAINTEXT state. 806 807 An end tag whose tag name is one of: "address", "article", "aside", 808 "blockquote", "center", "datagrid", "details", "dialog", "dir", 809 "div", "dl", "fieldset", "figure", "footer", "header", 810 "listing", "menu", "nav", "ol", "pre", "section", "ul" 811 If the stack of open elements does not have an element in scope 812 with the same tag name as that of the token, then this is a 813 parse error; ignore the token. 814 815 Otherwise, run these steps: 816 817 1. Generate implied end tags. 818 2. If the current node is not an element with the same tag name 819 as that of the token, then this is a parse error. 820 3. Pop elements from the stack of open elements until an element 821 with the same tag name as the token has been popped from the 822 stack. 823 824 An end tag whose tag name is "form" 825 Let node be the element that the form element pointer is set to. 826 827 Set the form element pointer to null. 828 829 If node is null or the stack of open elements does not have node 830 in scope, then this is a parse error; ignore the token. 831 832 Otherwise, run these steps: 833 834 1. Generate implied end tags. 835 2. If the current node is not node, then this is a parse error. 836 3. Remove node from the stack of open elements. 837 838 An end tag whose tag name is "p" 839 If the stack of open elements does not have an element in scope 840 with the same tag name as that of the token, then this is a 841 parse error; act as if a start tag with the tag name p had been 842 seen, then reprocess the current token. 843 844 Otherwise, run these steps: 845 846 1. Generate implied end tags, except for elements with the same 847 tag name as the token. 848 2. If the current node is not an element with the same tag name 849 as that of the token, then this is a parse error. 850 3. Pop elements from the stack of open elements until an element 851 with the same tag name as the token has been popped from the 852 stack. 853 854 An end tag whose tag name is one of: "dd", "dt", "li" 855 If the stack of open elements does not have an element in scope 856 with the same tag name as that of the token, then this is a 857 parse error; ignore the token. 858 859 Otherwise, run these steps: 860 861 1. Generate implied end tags, except for elements with the same 862 tag name as the token. 863 2. If the current node is not an element with the same tag name 864 as that of the token, then this is a parse error. 865 3. Pop elements from the stack of open elements until an element 866 with the same tag name as the token has been popped from the 867 stack. 868 869 An end tag whose tag name is one of: "h1", "h2", "h3", "h4", "h5", "h6" 870 If the stack of open elements does not have an element in scope 871 whose tag name is one of "h1", "h2", "h3", "h4", "h5", or "h6", 872 then this is a parse error; ignore the token. 873 874 Otherwise, run these steps: 875 876 1. Generate implied end tags. 877 2. If the current node is not an element with the same tag name 878 as that of the token, then this is a parse error. 879 3. Pop elements from the stack of open elements until an element 880 whose tag name is one of "h1", "h2", "h3", "h4", "h5", or "h6" 881 has been popped from the stack. 882 883 An end tag whose tag name is "sarcasm" 884 Take a deep breath, then act as described in the "any other end 885 tag" entry below. 886 887 A start tag whose tag name is "a" 888 If the list of active formatting elements contains an element 889 whose tag name is "a" between the end of the list and the last 890 marker on the list (or the start of the list if there is no 891 marker on the list), then this is a parse error; act as if an 892 end tag with the tag name "a" had been seen, then remove that 893 element from the list of active formatting elements and the 894 stack of open elements if the end tag didn't already remove it 895 (it might not have if the element is not in table scope). 896 897 In the non-conforming stream 898 <a href="a">a<table><a href="b">b</table>x, the first a element 899 would be closed upon seeing the second one, and the "x" 900 character would be inside a link to "b", not to "a". This is 901 despite the fact that the outer a element is not in table scope 902 (meaning that a regular </a> end tag at the start of the table 903 wouldn't close the outer a element). 904 905 Reconstruct the active formatting elements, if any. 906 907 Insert an HTML element for the token. Add that element to the 908 list of active formatting elements. 909 910 A start tag whose tag name is one of: "b", "big", "em", "font", "i", 911 "s", "small", "strike", "strong", "tt", "u" 912 Reconstruct the active formatting elements, if any. 913 914 Insert an HTML element for the token. Add that element to the 915 list of active formatting elements. 916 917 A start tag whose tag name is "nobr" 918 Reconstruct the active formatting elements, if any. 919 920 If the stack of open elements has a nobr element in scope, then 921 this is a parse error; act as if an end tag with the tag name 922 "nobr" had been seen, then once again reconstruct the active 923 formatting elements, if any. 924 925 Insert an HTML element for the token. Add that element to the 926 list of active formatting elements. 927 928 An end tag whose tag name is one of: "a", "b", "big", "em", "font", 929 "i", "nobr", "s", "small", "strike", "strong", "tt", "u" 930 Follow these steps: 931 932 1. Let the formatting element be the last element in the list of 933 active formatting elements that: 934 o is between the end of the list and the last scope marker 935 in the list, if any, or the start of the list otherwise, 936 and 937 o has the same tag name as the token. 938 If there is no such node, or, if that node is also in the 939 stack of open elements but the element is not in scope, then 940 this is a parse error; ignore the token, and abort these 941 steps. 942 Otherwise, if there is such a node, but that node is not in 943 the stack of open elements, then this is a parse error; remove 944 the element from the list, and abort these steps. 945 Otherwise, there is a formatting element and that element is 946 in the stack and is in scope. If the element is not the 947 current node, this is a parse error. In any case, proceed with 948 the algorithm as written in the following steps. 949 2. Let the furthest block be the topmost node in the stack of 950 open elements that is lower in the stack than the formatting 951 element, and is not an element in the phrasing or formatting 952 categories. There might not be one. 953 3. If there is no furthest block, then the UA must skip the 954 subsequent steps and instead just pop all the nodes from the 955 bottom of the stack of open elements, from the current node up 956 to and including the formatting element, and remove the 957 formatting element from the list of active formatting 958 elements. 959 4. Let the common ancestor be the element immediately above the 960 formatting element in the stack of open elements. 961 5. If the furthest block has a parent node, then remove the 962 furthest block from its parent node. 963 6. Let a bookmark note the position of the formatting element in 964 the list of active formatting elements relative to the 965 elements on either side of it in the list. 966 7. Let node and last node be the furthest block. Follow these 967 steps: 968 1. Let node be the element immediately above node in the 969 stack of open elements. 970 2. If node is not in the list of active formatting elements, 971 then remove node from the stack of open elements and then 972 go back to step 1. 973 3. Otherwise, if node is the formatting element, then go to 974 the next step in the overall algorithm. 975 4. Otherwise, if last node is the furthest block, then move 976 the aforementioned bookmark to be immediately after the 977 node in the list of active formatting elements. 978 5. If node has any children, perform a shallow clone of 979 node, replace the entry for node in the list of active 980 formatting elements with an entry for the clone, replace 981 the entry for node in the stack of open elements with an 982 entry for the clone, and let node be the clone. 983 6. Insert last node into node, first removing it from its 984 previous parent node if any. 985 7. Let last node be node. 986 8. Return to step 1 of this inner set of steps. 987 8. If the common ancestor node is a table, tbody, tfoot, thead, 988 or tr element, then, foster parent whatever last node ended up 989 being in the previous step. 990 Otherwise, append whatever last node ended up being in the 991 previous step to the common ancestor node, first removing it 992 from its previous parent node if any. 993 9. Perform a shallow clone of the formatting element. 994 10. Take all of the child nodes of the furthest block and append 995 them to the clone created in the last step. 996 11. Append that clone to the furthest block. 997 12. Remove the formatting element from the list of active 998 formatting elements, and insert the clone into the list of 999 active formatting elements at the position of the 1000 aforementioned bookmark. 1001 13. Remove the formatting element from the stack of open elements, 1002 and insert the clone into the stack of open elements 1003 immediately below the position of the furthest block in that 1004 stack. 1005 14. Jump back to step 1 in this series of steps. 1006 1007 The way these steps are defined, only elements in the formatting 1008 category ever get cloned by this algorithm. 1009 1010 Because of the way this algorithm causes elements to change 1011 parents, it has been dubbed the "adoption agency algorithm" (in 1012 contrast with other possibly algorithms for dealing with 1013 misnested content, which included the "incest algorithm", the 1014 "secret affair algorithm", and the "Heisenberg algorithm"). 1015 1016 A start tag whose tag name is "button" 1017 If the stack of open elements has a button element in scope, 1018 then this is a parse error; act as if an end tag with the tag 1019 name "button" had been seen, then reprocess the token. 1020 1021 Otherwise: 1022 1023 Reconstruct the active formatting elements, if any. 1024 1025 Insert an HTML element for the token. 1026 1027 Insert a marker at the end of the list of active formatting 1028 elements. 1029 1030 A start tag token whose tag name is one of: "applet", "marquee", 1031 "object" 1032 Reconstruct the active formatting elements, if any. 1033 1034 Insert an HTML element for the token. 1035 1036 Insert a marker at the end of the list of active formatting 1037 elements. 1038 1039 An end tag token whose tag name is one of: "applet", "button", 1040 "marquee", "object" 1041 If the stack of open elements does not have an element in scope 1042 with the same tag name as that of the token, then this is a 1043 parse error; ignore the token. 1044 1045 Otherwise, run these steps: 1046 1047 1. Generate implied end tags. 1048 2. If the current node is not an element with the same tag name 1049 as that of the token, then this is a parse error. 1050 3. Pop elements from the stack of open elements until an element 1051 with the same tag name as the token has been popped from the 1052 stack. 1053 4. Clear the list of active formatting elements up to the last 1054 marker. 1055 1056 A start tag whose tag name is "xmp" 1057 Reconstruct the active formatting elements, if any. 1058 1059 Follow the generic CDATA element parsing algorithm. 1060 1061 A start tag whose tag name is "table" 1062 If the stack of open elements has a p element in scope, then act 1063 as if an end tag with the tag name "p" had been seen. 1064 1065 Insert an HTML element for the token. 1066 1067 Switch the insertion mode to "in table". 1068 1069 A start tag whose tag name is one of: "area", "basefont", "bgsound", 1070 "br", "embed", "img", "input", "spacer", "wbr" 1071 Reconstruct the active formatting elements, if any. 1072 1073 Insert an HTML element for the token. Immediately pop the 1074 current node off the stack of open elements. 1075 1076 Acknowledge the token's self-closing flag, if it is set. 1077 1078 A start tag whose tag name is one of: "param", "source" 1079 Insert an HTML element for the token. Immediately pop the 1080 current node off the stack of open elements. 1081 1082 Acknowledge the token's self-closing flag, if it is set. 1083 1084 A start tag whose tag name is "hr" 1085 If the stack of open elements has a p element in scope, then act 1086 as if an end tag with the tag name "p" had been seen. 1087 1088 Insert an HTML element for the token. Immediately pop the 1089 current node off the stack of open elements. 1090 1091 Acknowledge the token's self-closing flag, if it is set. 1092 1093 A start tag whose tag name is "image" 1094 Parse error. Change the token's tag name to "img" and reprocess 1095 it. (Don't ask.) 1096 1097 A start tag whose tag name is "isindex" 1098 Parse error. 1099 1100 If the form element pointer is not null, then ignore the token. 1101 1102 Otherwise: 1103 1104 Acknowledge the token's self-closing flag, if it is set. 1105 1106 Act as if a start tag token with the tag name "form" had been 1107 seen. 1108 1109 If the token has an attribute called "action", set the action 1110 attribute on the resulting form element to the value of the 1111 "action" attribute of the token. 1112 1113 Act as if a start tag token with the tag name "hr" had been 1114 seen. 1115 1116 Act as if a start tag token with the tag name "p" had been seen. 1117 1118 Act as if a start tag token with the tag name "label" had been 1119 seen. 1120 1121 Act as if a stream of character tokens had been seen (see below 1122 for what they should say). 1123 1124 Act as if a start tag token with the tag name "input" had been 1125 seen, with all the attributes from the "isindex" token except 1126 "name", "action", and "prompt". Set the name attribute of the 1127 resulting input element to the value "isindex". 1128 1129 Act as if a stream of character tokens had been seen (see below 1130 for what they should say). 1131 1132 Act as if an end tag token with the tag name "label" had been 1133 seen. 1134 1135 Act as if an end tag token with the tag name "p" had been seen. 1136 1137 Act as if a start tag token with the tag name "hr" had been 1138 seen. 1139 1140 Act as if an end tag token with the tag name "form" had been 1141 seen. 1142 1143 If the token has an attribute with the name "prompt", then the 1144 first stream of characters must be the same string as given in 1145 that attribute, and the second stream of characters must be 1146 empty. Otherwise, the two streams of character tokens together 1147 should, together with the input element, express the equivalent 1148 of "This is a searchable index. Insert your search keywords 1149 here: (input field)" in the user's preferred language. 1150 1151 A start tag whose tag name is "textarea" 1152 1153 1. Insert an HTML element for the token. 1154 2. If the next token is a U+000A LINE FEED (LF) character token, 1155 then ignore that token and move on to the next one. (Newlines 1156 at the start of textarea elements are ignored as an authoring 1157 convenience.) 1158 3. Switch the tokeniser's content model flag to the RCDATA state. 1159 4. Let the original insertion mode be the current insertion mode. 1160 5. Switch the insertion mode to "in CDATA/RCDATA". 1161 1162 A start tag whose tag name is one of: "iframe", "noembed" 1163 A start tag whose tag name is "noscript", if the scripting flag is 1164 enabled 1165 Follow the generic CDATA element parsing algorithm. 1166 1167 A start tag whose tag name is "select" 1168 Reconstruct the active formatting elements, if any. 1169 1170 Insert an HTML element for the token. 1171 1172 If the insertion mode is one of in table", "in caption", "in 1173 column group", "in table body", "in row", or "in cell", then 1174 switch the insertion mode to "in select in table". Otherwise, 1175 switch the insertion mode to "in select". 1176 1177 A start tag whose tag name is one of: "optgroup", "option" 1178 If the stack of open elements has an option element in scope, 1179 then act as if an end tag with the tag name "option" had been 1180 seen. 1181 1182 Reconstruct the active formatting elements, if any. 1183 1184 Insert an HTML element for the token. 1185 1186 A start tag whose tag name is one of: "rp", "rt" 1187 If the stack of open elements has a ruby element in scope, then 1188 generate implied end tags. If the current node is not then a 1189 ruby element, this is a parse error; pop all the nodes from the 1190 current node up to the node immediately before the bottommost 1191 ruby element on the stack of open elements. 1192 1193 Insert an HTML element for the token. 1194 1195 An end tag whose tag name is "br" 1196 Parse error. Act as if a start tag token with the tag name "br" 1197 had been seen. Ignore the end tag token. 1198 1199 A start tag whose tag name is "math" 1200 Reconstruct the active formatting elements, if any. 1201 1202 Adjust MathML attributes for the token. (This fixes the case of 1203 MathML attributes that are not all lowercase.) 1204 1205 Adjust foreign attributes for the token. (This fixes the use of 1206 namespaced attributes, in particular XLink.) 1207 1208 Insert a foreign element for the token, in the MathML namespace. 1209 1210 If the token has its self-closing flag set, pop the current node 1211 off the stack of open elements and acknowledge the token's 1212 self-closing flag. 1213 1214 Otherwise, let the secondary insertion mode be the current 1215 insertion mode, and then switch the insertion mode to "in 1216 foreign content". 1217 1218 A start tag whose tag name is one of: "caption", "col", "colgroup", 1219 "frame", "frameset", "head", "tbody", "td", "tfoot", "th", 1220 "thead", "tr" 1221 Parse error. Ignore the token. 1222 1223 Any other start tag 1224 Reconstruct the active formatting elements, if any. 1225 1226 Insert an HTML element for the token. 1227 1228 This element will be a phrasing element. 1229 1230 Any other end tag 1231 Run the following steps: 1232 1233 1. Initialize node to be the current node (the bottommost node of 1234 the stack). 1235 2. If node has the same tag name as the end tag token, then: 1236 1. Generate implied end tags. 1237 2. If the tag name of the end tag token does not match the 1238 tag name of the current node, this is a parse error. 1239 3. Pop all the nodes from the current node up to node, 1240 including node, then stop these steps. 1241 3. Otherwise, if node is in neither the formatting category nor 1242 the phrasing category, then this is a parse error; ignore the 1243 token, and abort these steps. 1244 4. Set node to the previous entry in the stack of open elements. 1245 5. Return to step 2. 1246 1247 8.2.5.11 The "in CDATA/RCDATA" insertion mode 1248 1249 When the insertion mode is "in CDATA/RCDATA", tokens must be handled as 1250 follows: 1251 1252 A character token 1253 Insert the token's character into the current node. 1254 1255 An end-of-file token 1256 Parse error. 1257 1258 If the current node is a script element, mark the script element 1259 as "already executed". 1260 1261 Pop the current node off the stack of open elements. 1262 1263 Switch the insertion mode to the original insertion mode and 1264 reprocess the current token. 1265 1266 An end tag whose tag name is "script" 1267 Let script be the current node (which will be a script element). 1268 1269 Pop the current node off the stack of open elements. 1270 1271 Switch the insertion mode to the original insertion mode. 1272 1273 Let the old insertion point have the same value as the current 1274 insertion point. Let the insertion point be just before the next 1275 input character. 1276 1277 Increment the parser's script nesting level by one. 1278 1279 Run the script. This might cause some script to execute, which 1280 might cause new characters to be inserted into the tokeniser, 1281 and might cause the tokeniser to output more tokens, resulting 1282 in a reentrant invocation of the parser. 1283 1284 Decrement the parser's script nesting level by one. If the 1285 parser's script nesting level is zero, then set the parser pause 1286 flag to false. 1287 1288 Let the insertion point have the value of the old insertion 1289 point. (In other words, restore the insertion point to the value 1290 it had before the previous paragraph. This value might be the 1291 "undefined" value.) 1292 1293 At this stage, if there is a pending external script, then: 1294 1295 If the tree construction stage is being called reentrantly, say 1296 from a call to document.write(): 1297 Set the parser pause flag to true, and abort the 1298 processing of any nested invocations of the tokeniser, 1299 yielding control back to the caller. (Tokenization will 1300 resume when the caller returns to the "outer" tree 1301 construction stage.) 1302 1303 Otherwise: 1304 Follow these steps: 1305 1306 1. Let the script be the pending external script. There is 1307 no longer a pending external script. 1308 2. Pause until the script has completed loading. 1309 3. Let the insertion point be just before the next input 1310 character. 1311 4. Execute the script. 1312 5. Let the insertion point be undefined again. 1313 6. If there is once again a pending external script, then 1314 repeat these steps from step 1. 1315 1316 Any other end tag 1317 Pop the current node off the stack of open elements. 1318 1319 Switch the insertion mode to the original insertion mode. 1320 1321 8.2.5.12 The "in table" insertion mode 1322 1323 When the insertion mode is "in table", tokens must be handled as 1324 follows: 1325 1326 A character token that is one of one of U+0009 CHARACTER TABULATION, 1327 U+000A LINE FEED (LF), U+000C FORM FEED (FF), or U+0020 SPACE 1328 If the current table is tainted, then act as described in the 1329 "anything else" entry below. 1330 1331 Otherwise, insert the character into the current node. 1332 1333 A comment token 1334 Append a Comment node to the current node with the data 1335 attribute set to the data given in the comment token. 1336 1337 A DOCTYPE token 1338 Parse error. Ignore the token. 1339 1340 A start tag whose tag name is "caption" 1341 Clear the stack back to a table context. (See below.) 1342 1343 Insert a marker at the end of the list of active formatting 1344 elements. 1345 1346 Insert an HTML element for the token, then switch the insertion 1347 mode to "in caption". 1348 1349 A start tag whose tag name is "colgroup" 1350 Clear the stack back to a table context. (See below.) 1351 1352 Insert an HTML element for the token, then switch the insertion 1353 mode to "in column group". 1354 1355 A start tag whose tag name is "col" 1356 Act as if a start tag token with the tag name "colgroup" had 1357 been seen, then reprocess the current token. 1358 1359 A start tag whose tag name is one of: "tbody", "tfoot", "thead" 1360 Clear the stack back to a table context. (See below.) 1361 1362 Insert an HTML element for the token, then switch the insertion 1363 mode to "in table body". 1364 1365 A start tag whose tag name is one of: "td", "th", "tr" 1366 Act as if a start tag token with the tag name "tbody" had been 1367 seen, then reprocess the current token. 1368 1369 A start tag whose tag name is "table" 1370 Parse error. Act as if an end tag token with the tag name 1371 "table" had been seen, then, if that token wasn't ignored, 1372 reprocess the current token. 1373 1374 The fake end tag token here can only be ignored in the fragment 1375 case. 1376 1377 An end tag whose tag name is "table" 1378 If the stack of open elements does not have an element in table 1379 scope with the same tag name as the token, this is a parse 1380 error. Ignore the token. (fragment case) 1381 1382 Otherwise: 1383 1384 Pop elements from this stack until a table element has been 1385 popped from the stack. 1386 1387 Reset the insertion mode appropriately. 1388 1389 An end tag whose tag name is one of: "body", "caption", "col", 1390 "colgroup", "html", "tbody", "td", "tfoot", "th", "thead", "tr" 1391 Parse error. Ignore the token. 1392 1393 A start tag whose tag name is one of: "style", "script" 1394 If the current table is tainted then act as described in the 1395 "anything else" entry below. 1396 1397 Otherwise, process the token using the rules for the "in head" 1398 insertion mode. 1399 1400 A start tag whose tag name is "input" 1401 If the token does not have an attribute with the name "type", or 1402 if it does, but that attribute's value is not an ASCII 1403 case-insensitive match for the string "hidden", or, if the 1404 current table is tainted, then: act as described in the 1405 "anything else" entry below. 1406 1407 Otherwise: 1408 1409 Parse error. 1410 1411 Insert an HTML element for the token. 1412 1413 Pop that input element off the stack of open elements. 1414 1415 An end-of-file token 1416 If the current node is not the root html element, then this is a 1417 parse error. 1418 1419 It can only be the current node in the fragment case. 1420 1421 Stop parsing. 1422 1423 Anything else 1424 Parse error. Process the token using the rules for the "in body" 1425 insertion mode, except that if the current node is a table, 1426 tbody, tfoot, thead, or tr element, then, whenever a node would 1427 be inserted into the current node, it must instead be foster 1428 parented. 1429 1430 When the steps above require the UA to clear the stack back to a table 1431 context, it means that the UA must, while the current node is not a 1432 table element or an html element, pop elements from the stack of open 1433 elements. 1434 1435 The current node being an html element after this process is a fragment 1436 case. 1437 1438 8.2.5.13 The "in caption" insertion mode 1439 1440 When the insertion mode is "in caption", tokens must be handled as 1441 follows: 1442 1443 An end tag whose tag name is "caption" 1444 If the stack of open elements does not have an element in table 1445 scope with the same tag name as the token, this is a parse 1446 error. Ignore the token. (fragment case) 1447 1448 Otherwise: 1449 1450 Generate implied end tags. 1451 1452 Now, if the current node is not a caption element, then this is 1453 a parse error. 1454 1455 Pop elements from this stack until a caption element has been 1456 popped from the stack. 1457 1458 Clear the list of active formatting elements up to the last 1459 marker. 1460 1461 Switch the insertion mode to "in table". 1462 1463 A start tag whose tag name is one of: "caption", "col", "colgroup", 1464 "tbody", "td", "tfoot", "th", "thead", "tr" 1465 1466 An end tag whose tag name is "table" 1467 Parse error. Act as if an end tag with the tag name "caption" 1468 had been seen, then, if that token wasn't ignored, reprocess the 1469 current token. 1470 1471 The fake end tag token here can only be ignored in the fragment 1472 case. 1473 1474 An end tag whose tag name is one of: "body", "col", "colgroup", "html", 1475 "tbody", "td", "tfoot", "th", "thead", "tr" 1476 Parse error. Ignore the token. 1477 1478 Anything else 1479 Process the token using the rules for the "in body" insertion 1480 mode. 1481 1482 8.2.5.14 The "in column group" insertion mode 1483 1484 When the insertion mode is "in column group", tokens must be handled as 1485 follows: 1486 1487 A character token that is one of one of U+0009 CHARACTER TABULATION, 1488 U+000A LINE FEED (LF), U+000C FORM FEED (FF), or U+0020 SPACE 1489 Insert the character into the current node. 1490 1491 A comment token 1492 Append a Comment node to the current node with the data 1493 attribute set to the data given in the comment token. 1494 1495 A DOCTYPE token 1496 Parse error. Ignore the token. 1497 1498 A start tag whose tag name is "html" 1499 Process the token using the rules for the "in body" insertion 1500 mode. 1501 1502 A start tag whose tag name is "col" 1503 Insert an HTML element for the token. Immediately pop the 1504 current node off the stack of open elements. 1505 1506 Acknowledge the token's self-closing flag, if it is set. 1507 1508 An end tag whose tag name is "colgroup" 1509 If the current node is the root html element, then this is a 1510 parse error; ignore the token. (fragment case) 1511 1512 Otherwise, pop the current node (which will be a colgroup 1513 element) from the stack of open elements. Switch the insertion 1514 mode to "in table". 1515 1516 An end tag whose tag name is "col" 1517 Parse error. Ignore the token. 1518 1519 An end-of-file token 1520 If the current node is the root html element, then stop parsing. 1521 (fragment case) 1522 1523 Otherwise, act as described in the "anything else" entry below. 1524 1525 Anything else 1526 Act as if an end tag with the tag name "colgroup" had been seen, 1527 and then, if that token wasn't ignored, reprocess the current 1528 token. 1529 1530 The fake end tag token here can only be ignored in the fragment 1531 case. 1532 1533 8.2.5.15 The "in table body" insertion mode 1534 1535 When the insertion mode is "in table body", tokens must be handled as 1536 follows: 1537 1538 A start tag whose tag name is "tr" 1539 Clear the stack back to a table body context. (See below.) 1540 1541 Insert an HTML element for the token, then switch the insertion 1542 mode to "in row". 1543 1544 A start tag whose tag name is one of: "th", "td" 1545 Parse error. Act as if a start tag with the tag name "tr" had 1546 been seen, then reprocess the current token. 1547 1548 An end tag whose tag name is one of: "tbody", "tfoot", "thead" 1549 If the stack of open elements does not have an element in table 1550 scope with the same tag name as the token, this is a parse 1551 error. Ignore the token. 1552 1553 Otherwise: 1554 1555 Clear the stack back to a table body context. (See below.) 1556 1557 Pop the current node from the stack of open elements. Switch the 1558 insertion mode to "in table". 1559 1560 A start tag whose tag name is one of: "caption", "col", "colgroup", 1561 "tbody", "tfoot", "thead" 1562 1563 An end tag whose tag name is "table" 1564 If the stack of open elements does not have a tbody, thead, or 1565 tfoot element in table scope, this is a parse error. Ignore the 1566 token. (fragment case) 1567 1568 Otherwise: 1569 1570 Clear the stack back to a table body context. (See below.) 1571 1572 Act as if an end tag with the same tag name as the current node 1573 ("tbody", "tfoot", or "thead") had been seen, then reprocess the 1574 current token. 1575 1576 An end tag whose tag name is one of: "body", "caption", "col", 1577 "colgroup", "html", "td", "th", "tr" 1578 Parse error. Ignore the token. 1579 1580 Anything else 1581 Process the token using the rules for the "in table" insertion 1582 mode. 1583 1584 When the steps above require the UA to clear the stack back to a table 1585 body context, it means that the UA must, while the current node is not 1586 a tbody, tfoot, thead, or html element, pop elements from the stack of 1587 open elements. 1588 1589 The current node being an html element after this process is a fragment 1590 case. 1591 1592 8.2.5.16 The "in row" insertion mode 1593 1594 When the insertion mode is "in row", tokens must be handled as follows: 1595 1596 A start tag whose tag name is one of: "th", "td" 1597 Clear the stack back to a table row context. (See below.) 1598 1599 Insert an HTML element for the token, then switch the insertion 1600 mode to "in cell". 1601 1602 Insert a marker at the end of the list of active formatting 1603 elements. 1604 1605 An end tag whose tag name is "tr" 1606 If the stack of open elements does not have an element in table 1607 scope with the same tag name as the token, this is a parse 1608 error. Ignore the token. (fragment case) 1609 1610 Otherwise: 1611 1612 Clear the stack back to a table row context. (See below.) 1613 1614 Pop the current node (which will be a tr element) from the stack 1615 of open elements. Switch the insertion mode to "in table body". 1616 1617 A start tag whose tag name is one of: "caption", "col", "colgroup", 1618 "tbody", "tfoot", "thead", "tr" 1619 1620 An end tag whose tag name is "table" 1621 Act as if an end tag with the tag name "tr" had been seen, then, 1622 if that token wasn't ignored, reprocess the current token. 1623 1624 The fake end tag token here can only be ignored in the fragment 1625 case. 1626 1627 An end tag whose tag name is one of: "tbody", "tfoot", "thead" 1628 If the stack of open elements does not have an element in table 1629 scope with the same tag name as the token, this is a parse 1630 error. Ignore the token. 1631 1632 Otherwise, act as if an end tag with the tag name "tr" had been 1633 seen, then reprocess the current token. 1634 1635 An end tag whose tag name is one of: "body", "caption", "col", 1636 "colgroup", "html", "td", "th" 1637 Parse error. Ignore the token. 1638 1639 Anything else 1640 Process the token using the rules for the "in table" insertion 1641 mode. 1642 1643 When the steps above require the UA to clear the stack back to a table 1644 row context, it means that the UA must, while the current node is not a 1645 tr element or an html element, pop elements from the stack of open 1646 elements. 1647 1648 The current node being an html element after this process is a fragment 1649 case. 1650 1651 8.2.5.17 The "in cell" insertion mode 1652 1653 When the insertion mode is "in cell", tokens must be handled as 1654 follows: 1655 1656 An end tag whose tag name is one of: "td", "th" 1657 If the stack of open elements does not have an element in table 1658 scope with the same tag name as that of the token, then this is 1659 a parse error and the token must be ignored. 1660 1661 Otherwise: 1662 1663 Generate implied end tags. 1664 1665 Now, if the current node is not an element with the same tag 1666 name as the token, then this is a parse error. 1667 1668 Pop elements from this stack until an element with the same tag 1669 name as the token has been popped from the stack. 1670 1671 Clear the list of active formatting elements up to the last 1672 marker. 1673 1674 Switch the insertion mode to "in row". (The current node will be 1675 a tr element at this point.) 1676 1677 A start tag whose tag name is one of: "caption", "col", "colgroup", 1678 "tbody", "td", "tfoot", "th", "thead", "tr" 1679 If the stack of open elements does not have a td or th element 1680 in table scope, then this is a parse error; ignore the token. 1681 (fragment case) 1682 1683 Otherwise, close the cell (see below) and reprocess the current 1684 token. 1685 1686 An end tag whose tag name is one of: "body", "caption", "col", 1687 "colgroup", "html" 1688 Parse error. Ignore the token. 1689 1690 An end tag whose tag name is one of: "table", "tbody", "tfoot", 1691 "thead", "tr" 1692 If the stack of open elements does not have an element in table 1693 scope with the same tag name as that of the token (which can 1694 only happen for "tbody", "tfoot" and "thead", or, in the 1695 fragment case), then this is a parse error and the token must be 1696 ignored. 1697 1698 Otherwise, close the cell (see below) and reprocess the current 1699 token. 1700 1701 Anything else 1702 Process the token using the rules for the "in body" insertion 1703 mode. 1704 1705 Where the steps above say to close the cell, they mean to run the 1706 following algorithm: 1707 1. If the stack of open elements has a td element in table scope, then 1708 act as if an end tag token with the tag name "td" had been seen. 1709 2. Otherwise, the stack of open elements will have a th element in 1710 table scope; act as if an end tag token with the tag name "th" had 1711 been seen. 1712 1713 The stack of open elements cannot have both a td and a th element in 1714 table scope at the same time, nor can it have neither when the 1715 insertion mode is "in cell". 1716 1717 8.2.5.18 The "in select" insertion mode 1718 1719 When the insertion mode is "in select", tokens must be handled as 1720 follows: 1721 1722 A character token 1723 Insert the token's character into the current node. 1724 1725 A comment token 1726 Append a Comment node to the current node with the data 1727 attribute set to the data given in the comment token. 1728 1729 A DOCTYPE token 1730 Parse error. Ignore the token. 1731 1732 A start tag whose tag name is "html" 1733 Process the token using the rules for the "in body" insertion 1734 mode. 1735 1736 A start tag whose tag name is "option" 1737 If the current node is an option element, act as if an end tag 1738 with the tag name "option" had been seen. 1739 1740 Insert an HTML element for the token. 1741 1742 A start tag whose tag name is "optgroup" 1743 If the current node is an option element, act as if an end tag 1744 with the tag name "option" had been seen. 1745 1746 If the current node is an optgroup element, act as if an end tag 1747 with the tag name "optgroup" had been seen. 1748 1749 Insert an HTML element for the token. 1750 1751 An end tag whose tag name is "optgroup" 1752 First, if the current node is an option element, and the node 1753 immediately before it in the stack of open elements is an 1754 optgroup element, then act as if an end tag with the tag name 1755 "option" had been seen. 1756 1757 If the current node is an optgroup element, then pop that node 1758 from the stack of open elements. Otherwise, this is a parse 1759 error; ignore the token. 1760 1761 An end tag whose tag name is "option" 1762 If the current node is an option element, then pop that node 1763 from the stack of open elements. Otherwise, this is a parse 1764 error; ignore the token. 1765 1766 An end tag whose tag name is "select" 1767 If the stack of open elements does not have an element in table 1768 scope with the same tag name as the token, this is a parse 1769 error. Ignore the token. (fragment case) 1770 1771 Otherwise: 1772 1773 Pop elements from the stack of open elements until a select 1774 element has been popped from the stack. 1775 1776 Reset the insertion mode appropriately. 1777 1778 A start tag whose tag name is "select" 1779 Parse error. Act as if the token had been an end tag with the 1780 tag name "select" instead. 1781 1782 A start tag whose tag name is one of: "input", "textarea" 1783 Parse error. Act as if an end tag with the tag name "select" had 1784 been seen, and reprocess the token. 1785 1786 A start tag token whose tag name is "script" 1787 Process the token using the rules for the "in head" insertion 1788 mode. 1789 1790 An end-of-file token 1791 If the current node is not the root html element, then this is a 1792 parse error. 1793 1794 It can only be the current node in the fragment case. 1795 1796 Stop parsing. 1797 1798 Anything else 1799 Parse error. Ignore the token. 1800 1801 8.2.5.19 The "in select in table" insertion mode 1802 1803 When the insertion mode is "in select in table", tokens must be handled 1804 as follows: 1805 1806 A start tag whose tag name is one of: "caption", "table", "tbody", 1807 "tfoot", "thead", "tr", "td", "th" 1808 Parse error. Act as if an end tag with the tag name "select" had 1809 been seen, and reprocess the token. 1810 1811 An end tag whose tag name is one of: "caption", "table", "tbody", 1812 "tfoot", "thead", "tr", "td", "th" 1813 Parse error. 1814 1815 If the stack of open elements has an element in table scope with 1816 the same tag name as that of the token, then act as if an end 1817 tag with the tag name "select" had been seen, and reprocess the 1818 token. Otherwise, ignore the token. 1819 1820 Anything else 1821 Process the token using the rules for the "in select" insertion 1822 mode. 1823 1824 8.2.5.20 The "in foreign content" insertion mode 1825 1826 When the insertion mode is "in foreign content", tokens must be handled 1827 as follows: 1828 1829 A character token 1830 Insert the token's character into the current node. 1831 1832 A comment token 1833 Append a Comment node to the current node with the data 1834 attribute set to the data given in the comment token. 1835 1836 A DOCTYPE token 1837 Parse error. Ignore the token. 1838 1839 A start tag whose tag name is neither "mglyph" nor "malignmark", if the 1840 current node is an mi element in the MathML namespace. 1841 1842 A start tag whose tag name is neither "mglyph" nor "malignmark", if the 1843 current node is an mo element in the MathML namespace. 1844 1845 A start tag whose tag name is neither "mglyph" nor "malignmark", if the 1846 current node is an mn element in the MathML namespace. 1847 1848 A start tag whose tag name is neither "mglyph" nor "malignmark", if the 1849 current node is an ms element in the MathML namespace. 1850 1851 A start tag whose tag name is neither "mglyph" nor "malignmark", if the 1852 current node is an mtext element in the MathML namespace. 1853 1854 A start tag, if the current node is an element in the HTML namespace. 1855 An end tag 1856 Process the token using the rules for the secondary insertion 1857 mode. 1858 1859 If, after doing so, the insertion mode is still "in foreign 1860 content", but there is no element in scope that has a namespace 1861 other than the HTML namespace, switch the insertion mode to the 1862 secondary insertion mode. 1863 1864 A start tag whose tag name is one of: "b", "big", "blockquote", "body", 1865 "br", "center", "code", "dd", "div", "dl", "dt", "em", "embed", 1866 "h1", "h2", "h3", "h4", "h5", "h6", "head", "hr", "i", "img", 1867 "li", "listing", "menu", "meta", "nobr", "ol", "p", "pre", 1868 "ruby", "s", "small", "span", "strong", "strike", "sub", "sup", 1869 "table", "tt", "u", "ul", "var" 1870 1871 A start tag whose tag name is "font", if the token has any attributes 1872 named "color", "face", or "size" 1873 1874 An end-of-file token 1875 Parse error. 1876 1877 Pop elements from the stack of open elements until the current 1878 node is in the HTML namespace. 1879 1880 Switch the insertion mode to the secondary insertion mode, and 1881 reprocess the token. 1882 1883 Any other start tag 1884 If the current node is an element in the MathML namespace, 1885 adjust MathML attributes for the token. (This fixes the case of 1886 MathML attributes that are not all lowercase.) 1887 1888 Adjust foreign attributes for the token. (This fixes the use of 1889 namespaced attributes, in particular XLink in SVG.) 1890 1891 Insert a foreign element for the token, in the same namespace as 1892 the current node. 1893 1894 If the token has its self-closing flag set, pop the current node 1895 off the stack of open elements and acknowledge the token's 1896 self-closing flag. 1897 1898 8.2.5.21 The "after body" insertion mode 1899 1900 When the insertion mode is "after body", tokens must be handled as 1901 follows: 1902 1903 A character token that is one of one of U+0009 CHARACTER TABULATION, 1904 U+000A LINE FEED (LF), U+000C FORM FEED (FF), or U+0020 SPACE 1905 Process the token using the rules for the "in body" insertion 1906 mode. 1907 1908 A comment token 1909 Append a Comment node to the first element in the stack of open 1910 elements (the html element), with the data attribute set to the 1911 data given in the comment token. 1912 1913 A DOCTYPE token 1914 Parse error. Ignore the token. 1915 1916 A start tag whose tag name is "html" 1917 Process the token using the rules for the "in body" insertion 1918 mode. 1919 1920 An end tag whose tag name is "html" 1921 If the parser was originally created as part of the HTML 1922 fragment parsing algorithm, this is a parse error; ignore the 1923 token. (fragment case) 1924 1925 Otherwise, switch the insertion mode to "after after body". 1926 1927 An end-of-file token 1928 Stop parsing. 1929 1930 Anything else 1931 Parse error. Switch the insertion mode to "in body" and 1932 reprocess the token. 1933 1934 8.2.5.22 The "in frameset" insertion mode 1935 1936 When the insertion mode is "in frameset", tokens must be handled as 1937 follows: 1938 1939 A character token that is one of one of U+0009 CHARACTER TABULATION, 1940 U+000A LINE FEED (LF), U+000C FORM FEED (FF), or U+0020 SPACE 1941 Insert the character into the current node. 1942 1943 A comment token 1944 Append a Comment node to the current node with the data 1945 attribute set to the data given in the comment token. 1946 1947 A DOCTYPE token 1948 Parse error. Ignore the token. 1949 1950 A start tag whose tag name is "html" 1951 Process the token using the rules for the "in body" insertion 1952 mode. 1953 1954 A start tag whose tag name is "frameset" 1955 Insert an HTML element for the token. 1956 1957 An end tag whose tag name is "frameset" 1958 If the current node is the root html element, then this is a 1959 parse error; ignore the token. (fragment case) 1960 1961 Otherwise, pop the current node from the stack of open elements. 1962 1963 If the parser was not originally created as part of the HTML 1964 fragment parsing algorithm (fragment case), and the current node 1965 is no longer a frameset element, then switch the insertion mode 1966 to "after frameset". 1967 1968 A start tag whose tag name is "frame" 1969 Insert an HTML element for the token. Immediately pop the 1970 current node off the stack of open elements. 1971 1972 Acknowledge the token's self-closing flag, if it is set. 1973 1974 A start tag whose tag name is "noframes" 1975 Process the token using the rules for the "in head" insertion 1976 mode. 1977 1978 An end-of-file token 1979 If the current node is not the root html element, then this is a 1980 parse error. 1981 1982 It can only be the current node in the fragment case. 1983 1984 Stop parsing. 1985 1986 Anything else 1987 Parse error. Ignore the token. 1988 1989 8.2.5.23 The "after frameset" insertion mode 1990 1991 When the insertion mode is "after frameset", tokens must be handled as 1992 follows: 1993 1994 A character token that is one of one of U+0009 CHARACTER TABULATION, 1995 U+000A LINE FEED (LF), U+000C FORM FEED (FF), or U+0020 SPACE 1996 Insert the character into the current node. 1997 1998 A comment token 1999 Append a Comment node to the current node with the data 2000 attribute set to the data given in the comment token. 2001 2002 A DOCTYPE token 2003 Parse error. Ignore the token. 2004 2005 A start tag whose tag name is "html" 2006 Process the token using the rules for the "in body" insertion 2007 mode. 2008 2009 An end tag whose tag name is "html" 2010 Switch the insertion mode to "after after frameset". 2011 2012 A start tag whose tag name is "noframes" 2013 Process the token using the rules for the "in head" insertion 2014 mode. 2015 2016 An end-of-file token 2017 Stop parsing. 2018 2019 Anything else 2020 Parse error. Ignore the token. 2021 2022 This doesn't handle UAs that don't support frames, or that do support 2023 frames but want to show the NOFRAMES content. Supporting the former is 2024 easy; supporting the latter is harder. 2025 2026 8.2.5.24 The "after after body" insertion mode 2027 2028 When the insertion mode is "after after body", tokens must be handled 2029 as follows: 2030 2031 A comment token 2032 Append a Comment node to the Document object with the data 2033 attribute set to the data given in the comment token. 2034 2035 A DOCTYPE token 2036 A character token that is one of one of U+0009 CHARACTER TABULATION, 2037 U+000A LINE FEED (LF), U+000C FORM FEED (FF), or U+0020 SPACE 2038 2039 A start tag whose tag name is "html" 2040 Process the token using the rules for the "in body" insertion 2041 mode. 2042 2043 An end-of-file token 2044 Stop parsing. 2045 2046 Anything else 2047 Parse error. Switch the insertion mode to "in body" and 2048 reprocess the token. 2049 2050 8.2.5.25 The "after after frameset" insertion mode 2051 2052 When the insertion mode is "after after frameset", tokens must be 2053 handled as follows: 2054 2055 A comment token 2056 Append a Comment node to the Document object with the data 2057 attribute set to the data given in the comment token. 2058 2059 A DOCTYPE token 2060 A character token that is one of one of U+0009 CHARACTER TABULATION, 2061 U+000A LINE FEED (LF), U+000C FORM FEED (FF), or U+0020 SPACE 2062 2063 A start tag whose tag name is "html" 2064 Process the token using the rules for the "in body" insertion 2065 mode. 2066 2067 An end-of-file token 2068 Stop parsing. 2069 2070 A start tag whose tag name is "noframes" 2071 Process the token using the rules for the "in head" insertion 2072 mode. 2073 2074 Anything else 2075 Parse error. Ignore the token. 2076 2077 8.2.6 The end 2078 2079 Once the user agent stops parsing the document, the user agent must 2080 follow the steps in this section. 2081 2082 First, the current document readiness must be set to "interactive". 2083 2084 Then, the rules for when a script completes loading start applying 2085 (script execution is no longer managed by the parser). 2086 2087 If any of the scripts in the list of scripts that will execute as soon 2088 as possible have completed loading, or if the list of scripts that will 2089 execute asynchronously is not empty and the first script in that list 2090 has completed loading, then the user agent must act as if those scripts 2091 just completed loading, following the rules given for that in the 2092 script element definition. 2093 2094 Then, if the list of scripts that will execute when the document has 2095 finished parsing is not empty, and the first item in this list has 2096 already completed loading, then the user agent must act as if that 2097 script just finished loading. 2098 2099 By this point, there will be no scripts that have loaded but have not 2100 yet been executed. 2101 2102 The user agent must then fire a simple event called DOMContentLoaded at 2103 the Document. 2104 2105 Once everything that delays the load event has completed, the user 2106 agent must set the current document readiness to "complete", and then 2107 fire a load event at the body element. 2108 2109 delaying the load event for things like image loads allows for intranet 2110 port scans (even without javascript!). Should we really encode that 2111 into the spec? 2112 2113 8.2.7 Coercing an HTML DOM into an infoset 2114 2115 When an application uses an HTML parser in conjunction with an XML 2116 pipeline, it is possible that the constructed DOM is not compatible 2117 with the XML tool chain in certain subtle ways. For example, an XML 2118 toolchain might not be able to represent attributes with the name 2119 xmlns, since they conflict with the Namespaces in XML syntax. There is 2120 also some data that the HTML parser generates that isn't included in 2121 the DOM itself. This section specifies some rules for handling these 2122 issues. 2123 2124 If the XML API being used doesn't support DOCTYPEs, the tool may drop 2125 DOCTYPEs altogether. 2126 2127 If the XML API doesn't support attributes in no namespace that are 2128 named "xmlns", attributes whose names start with "xmlns:", or 2129 attributes in the XMLNS namespace, then the tool may drop such 2130 attributes. 2131 2132 The tool may annotate the output with any namespace declarations 2133 required for proper operation. 2134 2135 If the XML API being used restricts the allowable characters in the 2136 local names of elements and attributes, then the tool may map all 2137 element and attribute local names that the API wouldn't support to a 2138 set of names that are allowed, by replacing any character that isn't 2139 supported with the uppercase letter U and the five digits of the 2140 character's Unicode codepoint when expressed in hexadecimal, using 2141 digits 0-9 and capital letters A-F as the symbols, in increasing 2142 numeric order. 2143 2144 For example, the element name foo<bar, which can be output by the HTML 2145 parser, though it is neither a legal HTML element name nor a 2146 well-formed XML element name, would be converted into fooU0003Cbar, 2147 which is a well-formed XML element name (though it's still not legal in 2148 HTML by any means). 2149 2150 As another example, consider the attribute xlink:href. Used on a MathML 2151 element, it becomes, after being adjusted, an attribute with a prefix 2152 "xlink" and a local name "href". However, used on an HTML element, it 2153 becomes an attribute with no prefix and the local name "xlink:href", 2154 which is not a valid NCName, and thus might not be accepted by an XML 2155 API. It could thus get converted, becoming "xlinkU0003Ahref". 2156 2157 The resulting names from this conversion conveniently can't clash with 2158 any attribute generated by the HTML parser, since those are all either 2159 lowercase or those listed in the adjust foreign attributes algorithm's 2160 table. 2161 2162 If the XML API restricts comments from having two consecutive U+002D 2163 HYPHEN-MINUS characters (--), the tool may insert a single U+0020 SPACE 2164 character between any such offending characters. 2165 2166 If the XML API restricts comments from ending in a U+002D HYPHEN-MINUS 2167 character (-), the tool may insert a single U+0020 SPACE character at 2168 the end of such comments. 2169 2170 If the XML API restricts allowed characters in character data, the tool 2171 may replace any U+000C FORM FEED (FF) character with a U+0020 SPACE 2172 character, and any other literal non-XML character with a U+FFFD 2173 REPLACEMENT CHARACTER. 2174 2175 If the tool has no way to convey out-of-band information, then the tool 2176 may drop the following information: 2177 * Whether the document is set to no quirks mode, limited quirks mode, 2178 or quirks mode 2179 * The association between form controls and forms that aren't their 2180 nearest form element ancestor (use of the form element pointer in 2181 the parser) 2182 2183 The mutations allowed by this section apply after the HTML parser's 2184 rules have been applied. For example, a <a::> start tag will be closed 2185 by a </a::> end tag, and never by a </aU0003AU0003A> end tag, even if 2186 the user agent is using the rules above to then generate an actual 2187 element in the DOM with the name aU0003AU0003A for that start tag. 2188 2189 8.3 Namespaces 2190 2191 The HTML namespace is: http://www.w3.org/1999/xhtml 2192 2193 The MathML namespace is: http://www.w3.org/1998/Math/MathML 2194 2195 The SVG namespace is: http://www.w3.org/2000/svg 2196 2197 The XLink namespace is: http://www.w3.org/1999/xlink 2198 2199 The XML namespace is: http://www.w3.org/XML/1998/namespace 2200 2201 The XMLNS namespace is: http://www.w3.org/2000/xmlns/ 2202
