Are there any packages to import bibxml into (la)tex?

While I was able to find several packages to export bibtex to bibxml, and even the whole latex stuff to xml/mathml, I could not find anything in the opposite direction.

Of course it would be great to be able importing mathml into (la)tex, but if this is too much to ask, maybe there is at least something to handle bibliography?

I found something called xmltex but the only documentation I found looks quite frightening for a lame user like me. It seems to require scary things like configuration, building formats, etc.

Can anybody explain in the for dummies style how to use xmltex? Or maybe there are some more user friendly packages?