Ok, got the picture. Modelling by inheritance.
One comment though. I normally want all my codes to come from a codeset table, hence the descriminator is a foreign key attribute on the master table. But the interface requires me to give a new name for the descriminator (unable to select an existing attribyte). Enterign an existing name will produce duplicate column name in the generated physical model.
Customer support service by UserEcho
sorry, I don't read polish