[Zope] Zope caching method results??

I have an external method that is using a class I've written. The class uses another module (dbxml for the Berkeley XML database). It _appears_ as if Zope is caching function results from the dbxml module. The data doesn't change, but the memory address does. tmpXmlResults = self._manifest.queryWithXPath(resourceXpath, self._manifestcontext) The code runs perfectly if run outside of Zope simply on the command line. Is there any sort of caching that Zope does of non-product Python objects? Or function results? Etc.? Thanks, John toews