Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/ibm/not-wf/P42/ibm42n04.xml
<?xml version="1.0"?> <!DOCTYPE root [ <!ELEMENT root ANY> <!ATTLIST root attr1 CDATA #IMPLIED> ]> <root attr1="any">Extra white space before Name in ETag </ root>