The ORM Foundation

Of course. And do you think this was the OP's case ?  That his business problem was the database design itself ? Or would you rather think his business problem was the original business problem that his database was part of the solution for ?

I think this reply (ed. the "OK - here is an outline of "where I am coming from" " one) is spot on. The intended use of ORM is to model *business* stuff at the *conceptual* level. User defined data types are clearly a component of *logical db design*, which is distinct from conceptual business modeling, and should and ...