Wot no DTD parser ???

I cannot find a Java-based DTD parser and I cannot believe it! Of course there are parsers out there but none that seem to be able to deal with my usecase or the example DTDs that I need to process! I have tried a bunch:

• Castor
• Matra
• Wutka

But none of those worked for me on these DTD's. So off to write one I guess. Oh well I must be going and I might be a while ;) ....