Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/ibm/xml-1.1/not-wf/P04/ibm04n02.xml
<?xml version="1.1" encoding="UTF-8"?> <!DOCTYPE ̳IllegalNameStartChar [ <!ELEMENT ̳IllegalNameStartChar ANY> ]> <!-- IllegalNameStartChar P4: #0x333 --> <̳IllegalNameStartChar/>