Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/ibm/not-wf/P80/ibm80n01.xml
<?xml version="1.0"encoding="UTF-8"?> <!--* missing white space in above EncodingDecl *--> <!DOCTYPE root [ <!ELEMENT root (#PCDATA)> <!ATTLIST root att CDATA #IMPLIED> ]> <root/>