Question

Describe constraints on specialization and generalization.

Answer 1

A means of identifying sub-groups within an entity set which have attributes that are not shared by all the entities (top-down).

Generalization: Multiple entity sets are synthesized into a higher-level entity set, based on common features (

Answer 2

Answer:

Explanation:

Constraints on specialization/generalization

This can be done to simplify the design model or represent a complex relationship that exists between entities. Disjoint: The disjoint constraint only applies when a superclass has more than one subclass.