Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/ibm/valid/P22/ibm22v07.xml
<?xml version="1.0" encoding="utf-8" ?> <!-- This is a Misc --> <!DOCTYPE doc [ <!ELEMENT doc EMPTY> ]> <!-- This is a Misc --> <doc/>