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A class diagram describes the structure of a system by showing the system's classes, their attributes, operations (or methods), and the relationships among the classes.

5
votes
What you want is a Decorator. An Administrator would be a subclass of User, and its primary member attribute would be a User object. Thus a Student Adminstrator would be an Administrator containing …
answered Sep 25 '13 by Matthew Flynn
4
votes
Subclasses and subtypes bring a lot of baggage with them in the form of inheritence and the desirabality of supporting the Liskov Substitution Principle. It would be pretty foolish to start creating …
answered Oct 22 '13 by Matthew Flynn