Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/eduni/xml-1.1/044.xml
<?xml version="1.0" encoding="iso-8859-1"?> <!-- Contains a character reference to a C1 control character (partial line up), legal in both XML 1.0 and 1.1 (but for different reasons) --> <!DOCTYPE foo [ <!ELEMENT foo ANY> ]> <foo>Œ</foo>