[Zope] Applying xml tricks to dynamic sources?

Hi, I'd like to somehow use the xml product with xml that I retrieve via http. The examples I saw so far, though, assume that the is saved in Zope as an xml object. I guess I could get what I want by: 1) Fetch my xml via http 2) Save it in a temp folder 3) Apply whatever methods I want 4) Delete the temp folder ...Doesn't sound too great, if this'll be happening on every page request. Any other way? ( I think that this is an important issue - Factoring network services into xml data sources is the Big Thing, and systems that can filter/manipulate xml and then pass it on are in high demand. Right now, I'm deciding whether to do this in Zope or in Java servlets...) Thanks, Robb