How to Define a Subtype Definition and its Elements
All tables that are elements of the same subtype definition must have the same supertype. Apart from defining a definition and its elements, you also define what the relation between the various elements is: exclusive, total, both, or neither. Exclusivity and totality are constraints on the elements of a subtype definition. Between the subtypes there exists a relationship, and to this relationship exclusivity and/or totality rules may apply.
To define a subtype definition and its elements:
The New Subtype Rules wizard appears.
Once the definition has been created, you can always modify it by choosing Define, Subtype Groups, Definitions from the menu bar, and performing a query to retrieve the definition. You can use the What's This? help for more information on the fields in the Subtype Definitions window.
You can also create a new subtype definition yourself, by choosing Define, Subtype Groups, Definitions from the menu bar.