Thanks for the feedback real model is something like
Customer { properAssets : Assets // assets privately owned by the customer joinedAssets : Assets // assets collectively owned by the customer and his/her husband/spouse // and another one which I don't know the real meaning :) } The fact is, both the Object Modeling and the databse structure exist, and I'm the technical guy who's trying to see if Ibatis would be able to cope with how our developers have been working :) As far as possible I would prefer not putting constraints on either Object Model or Database because of the data access technology -- View this message in context: http://www.nabble.com/howto-%3A-Degenerated-case-of-heterogenous-lists.-tf3227674.html#a8968114 Sent from the iBATIS - User - Java mailing list archive at Nabble.com.