Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/ibm/not-wf/P69/ibm69n05.xml
<?xml version="1.0" standalone="yes"?> <!DOCTYPE root [ <!ELEMENT root (#PCDATA)> <!--* PE referenced before declared, against WFC: entity declared --> %paaa; <!ENTITY % paaa "<!ATTLIST root att CDATA #IMPLIED>"> <!ENTITY aaa "aString"> ]> <root/>