Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/eduni/xml-1.1/029.xml
<?xml version="1.1"?> <!-- Has CR-LSEP; 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>