Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/ibm/valid/P62/ibm62v04.xml
<?xml version="1.0"?> <!-- syntax test for Production 62--> <!DOCTYPE animal SYSTEM "ibm62v04.dtd"> <animal> <tiger/> Positive test. Test includeSect with pattern4 of p62. space included before and after INCLUDE </animal>