Dirk Datzert writes:

Which base python-zope class is necessary to store user-structured data in the following format:

zope-container non-zope structure object 1 non-zope object-container non-zope structure object 2 ...

Which base class must be the zope-container ? SimpleItem, PropertyManager, ObjectManager, or what. That depends on your requirements.

I probably would use "OFS.Folder" (it contains all of the above and more).

Which base class must the non-zope structured data ? Persistent, PropertyManager, SimpleItem All Zope site building objects should derive from "SimpleItem" (maybe indirectly).

Otherwise, it depends on your requirements (you include e.g. "PropertyManager", when you object should have Web manageable properties; it is that simple...) Dieter