Hi all, Does anyone know of a good tutorial on object oriented development in Zope using ZClasses, or know if it might be documented well in one of the existing or upcoming books. I was thinking specifically of how a class diagram might be mapped to the Zope environment, and how certain areas such as saving of persistent objects to a database and reading these back into objects might take place - basically the way things should be happening or a choice of ways to do certain things with recommendations. The end result is to create an entire system and be able to model it and it's sub-systems as products for reuse. I assume a product translates equally to what a package does in Java speak. Anyway, I'd appreciate a bit of enlightenment in this very powerful area of Zope. Perhaps might be a forum for discussion as to how people are currently building their systems in Zope using an object oriented methodology - saving of persistent objects - ZODB or RDBMS? I await some interesting responses! David Legg