[Zope] XML

What is the best way to parse XML with Zope? I've been digging all over the site, and the docs there keep talking about adding an XML Document, but that option doesn't exist on my Zope server (2.6.0 on RH 8.0) and I can't find anything indicating that there needs to be a product installed. Simply put, I want to be able to grab an XML document with webclient() and be able to parse the contents of the XML using DTML. TIA Rick