If there is an association to a superclass that has subclasses then we can add a restriction on that association that allows us to select one or more of those subclasses as a choice.
From this model we can make this schema
The association should be copied to the subset as an association to each of the selected subclasses iso to the superclass.
If there is an association to a superclass that has subclasses then we can add a restriction on that association that allows us to select one or more of those subclasses as a choice.
From this model we can make this schema
The association should be copied to the subset as an association to each of the selected subclasses iso to the superclass.