Generalization Relationships #

A generalization specifies "is a kind of" (or simply "is-a") relationship. It is most commonly used to depict any inheritance hierarchy.

The above example shows that the classes UndergradStudent and GradStudent are each derived from the class Student.

Generalization is represented by an arrow with a hollow head that points to the superclass. If a class implements an interface, you draw an arrow having a dotted shaft and hollow head from the class to the interface.