Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/ibm/valid/P16/ibm16v03.xml
<?xml version="1.0"?> <!DOCTYPE student [ <!ELEMENT student (#PCDATA)> ]> <?MyInstruct AVOID ? BEFORE > IN PI ?> <student>My Name is SnowMan. </student>