July 2001
Intermediate to advanced
656 pages
15h 51m
English
book
Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and the Unified Process, Second Edition
by Craig Larman
Content preview from Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and the Unified Process, Second Edition
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26.3. Defining Conceptual Superclasses and Subclasses
Since it is valuable to identify conceptual super- and subclasses, it is useful to clearly and precisely understand generalization, superclasses, and subclasses in terms of class definition and class sets.[2] This following sections explore these.
[2] That is, a class's intension and extension. This discussion was inspired by [MO95].
Generalization and Conceptual Class Definition
What is the relationship of a conceptual superclass to a subclass?
|
A conceptual superclass definition is more general or encompassing than a subclass definition. |
For example, consider the superclass Payment and its subclasses (CashPayment, and so on). Assume the definition of Payment is that it represents the transaction ...
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