14.5 Planning for Reuse: Specifying Definition and Usage in Allocation
The terms definition and usage were discussed in Chapter 7, Section 7.3.1. The term definition refers to a model element that is a classifier or type such as a block. The element is defined by specifying its features such as the properties and operations of a block. The term usage identifies a defined element in a particular context. For example, a part is a usage of a block in the context of a composite block, and the part is defined by the block that types it. The part’s connection with other parts on an internal block diagram, and its interaction with other parts on an activity or a sequence diagram, describe how the part is used. Leveraging the concepts of definition and ...
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