Hello All, A newbie question. Is there any hints and tricks how to establish connection between CASE like ERwin and Zope? We plan to develop a a medical record system based on SQL database so data scheme is essential. And all business rules will be held in Zope. SQL tables as I realize should be mapped to ZClasses - if there is an entity "Patient Personal Data" with columns Name, Gender, Date_of_birth, Street_address and so on, then ZClasses with appropriate properties are to be created. At the moment ER model can only be viewed and no more while working in Zope. Is it the only use of data modelling tools for Zope development? Or there is some other techniques of such application development one should be aware of? THX in advance. Best regards, Alexander N. Chelnokov Ural Scientific Institute of Traumatology and Orthopaedics 7, Bankovsky str. Ekaterinburg 620014 Russia ICQ: 25640913