Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/eduni/xml-1.1/027.xml
<?xml version="1.1" encoding="iso-8859-1"?> <!-- Has CR-NEL; legal in both XML 1.0 and 1.1, but different canonical output because of normalization in 1.1 --> <!DOCTYPE foo [ <!ELEMENT foo ANY> ]> <foo> �/foo>