Dear Zopers Here I have a (silly) question with regard to modelling a rather complex class structure in Zope (at least with respect to what I found as examples so far). For my fs/zpt application I have designed a class model (using UML) of a music library with some 20 classes (composer, instrument, cast, setting, etc.). Most examples of Zope that I found use a single content class (like the address book example that uses one entry class). Now I need to add instances of my 20+ classes to the application's main class. How would I do this? Add 20 dictionaries to the main container class? Or put them all in one? What about ids? Use separate names per class or create sub-folders? What about cross-links among instances? What about the _getitem_ method when I have more than one kind of items to list? I guess this is again a matter of getting used to the Zope philosophy. I come from languages like Java where I know how t do this, but it seems to be a bit different in Zope, or not? thanks a lot in advance Andre