Hi, Michel This model does provide some good info about some of the basic PTK object types and their relationships... I do have a few questions about this: - Does MFI exist now, or are you going to redo the objects that exist on the current zope.org site so that they utilizes the MFI? - Please tell me that the Membership System and Topics are still planned... these are really important. - Does the original model file include information about the attributes you plan for each of the object types? (I didn't see it in the HTML version anywhere) Kevin