[Zope] WebDAV overview

I'm looking into WebDAV support, and I'm a bit lost. More specifically, I can open a document with OpenOffice, but if I save it, nothing happens, the document doesn't get updated. I've been trying to figure out what happens in Zope, and what methods take care of this, but I have yet to come up with nothing useful. Can anybody give me or point me to an overview of the WebDAV support in Zope?