Domain Support (was: S.O.D.A. database Query API - call for comments)

Lee Fesperman:

>...In FirstSQL/J, we don't want the member B in
>object A to change when the separately referenced
>object B is changed. Linking of entities is
>through relational techniques. Navigating through
>member references in objects adds unneeded
>complexity to a query language.
>
>You see we are working towards evolving database,
>within a relational framework.

1. Do you regard the approach sketched above as a faithful implementation of "Domains as Extended Data Type," as described by Codd in _The Relational Model for Database Management, Version 2_, chapter 3?
2. Would Codd?
3. Has Codd had anything to say about other current and projected object-relational database products?
4. Will First/SQL differ in intended object-relational implementation from existing products such as DB2-UDB, Oracle, and DB2-UDB? If so, how? --- Richard Schulman To email me, remove the "XYZ"