What Goes in ~/.xmlc To Build the CVS Examples?

I've grabbed the docbook files via CVS and I'd like to be able to make 
the example slides project myself - since I am preparing my own slides 
I figure this will give me an idea of how to do the processing. The 
tools - perl wrappers in cvstools - are configured via a file 
(usually) called ~/.xmlc but I can not figure out what the content of 
that file should look like. Please can someone help with an example of 
~/.xmlc.

If I could translate this Perl

$xp->find("/config/*[\@xml:id='$id']")

To XML format I'd be OK...

It's <config></config> something but I can not figure out the xml:id bit.

Thanks

Simon