I mean objects that can contain other objects, like folders can.

There is at least one product that is not folderish: the poll product created in the product development tutorial. I suspect there are more.

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Here is another really good resource. http://www.zope.org/Documentation/ZDG/

Hi Rene, I had the very same Problem, i.e. nice explanation for developing non-folderish python products in the docs you mentioned, but nil for folderish products. What I did was simply looking at the source from OFS/Folder.py and just use the same base classes like Folder does. That way you just don't get the functionality which is defined in folder.py, i.e. the content-view, IIRC. You also get to see what is needed for a folderish product from the zope developers point of view. I did that because I felt I had more control about what happens where, but I assume thats just paranoia on my side and one could derive from OFS.folder without problems. But looking at the source at this stage of learning gives a lot insight. cheers, oliver