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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11.1. Associations
An association is a relationship between types (or more specifically, instances of those types) that indicates some meaningful and interesting connection (see Figure 11.1).
Figure 11.1. Associations.
In the UML associations are defined as “the semantic relationship between two or more classifiers that involve connections among their instances.”
Criteria for Useful Associations
Associations worth noting usually imply knowledge of a relationship that needs to be preserved for some duration—it could be milliseconds or years, depending on context. In other words, between what objects do we need to have some memory of a relationship? ...
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