1 <?xml version="1.0"?> 2 <!DOCTYPE root [ 3 <!ELEMENT root (#PCDATA)> 4 <!ELEMENT a ANY> 5 <!ELEMENT b ANY> 6 <!--* missing closing bracket in choice *--> 7 <!ELEMENT aElement (a |b * > 8 ]> 9 <root>Any content</root> 10 11
