1 <?xml version="1.0"?> 2 <!DOCTYPE test [ 3 <!ELEMENT test (#PCDATA)> 4 <!ENTITY % xx "%zz;"> 5 <!ENTITY % zz '<!ENTITY tricky "error-prone" >'> 6 <!ENTITY tricky "error-prone"> 7 ]> 8 <test>This sample shows a error-prone method.</test> 9
