Re: [Zope] NewB Qs: Classification advice please + many2many relationships

=?iso-8859-1?q?Felix=20Ulrich?= writes:

My question is: how should I classify my objects, and once I've done that, how do I maintain many-to-many relationships, e.g. all the Events happening at Business X? I can not answer your first question.

But the second is simple. Many-to-many relationsships are a bit difficult in RDB because the data types are all atomic, no lists or other aggregates (this changed with SQL 3). In Zope, you can have list valued properties. I would use any of the list value property types (tokens, list) to make the classification. Then I would use a ZCatalog's keyword index to search for related objects based on this classification. Dieter