Comment 1 for bug 248698

I know nothing about this subject, but I searched a bit. As far as I can see there is no standardized DTD for graphXML yet (according to http://en.wikipedia.org/wiki/GXL)

I found this DTD from Stichting Mathematisch Centrum (Stichting Mathematics Center) from year 2000 http://hypergraph.sourceforge.net/graphs/GraphXML.dtd

You might want to add a bit more information about what you're expecting to see happen so us normal people can follow the bug.