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Unified Modeling Language Reference Manual, The, Second Edition by Grady Booch, Ivar Jacobson, James Rumbaugh

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collaboration

A specification of a contextual relationship among instances that interact within a context to implement a desired functionality.

A collaboration is a description of structure. Collaborations are forms of structured classifiers. The behavior of a collaboration may be specified by interactions that show message flows in the collaboration over time.

See also connector, role, interaction, message.

Semantics

Behavior is implemented by groups of objects that exchange messages within a context to accomplish a purpose. To understand the mechanisms used in a design, it is important to focus on patterns of collaboration involved in accomplishing a purpose or a related set of purposes, projected from the larger system within which they fulfill ...

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