[Zope] XML-RPC and Zope

Hi there I am experimenting with XMP-RPC and Zope: I want to manipulate things from Borland Delphi. I got the example from the XML-RPC working, but now I wonder what other commands besides 'objectIds' are valid for Zope. For example, how can I determine which type each object in a folder is and how can I retrieve and store (change) the contents of an object ? Gijs Reulen