Explanation
Component diagrams show the structure of components, including classifiers that specify components, and
artifacts that implement them.
They can also be used to show the high level structure of the Implementation Model in terms of
Implementation Subsystems, and relationships between Implementation Elements.
Use
The most important use of the component diagram in RUP is to show the high level structure of the
Implementation Model. Specifically:
A secondary use of the component diagram is to show:
Note that the RUP emphasizes the use of the Component Diagram for modeling Implementation Subsystems,
significant Implementation Elements, and their relationships. However, a component diagram that shows UML
components and the classifiers that specify those components, can also be used in the Design Model, using
the UML component to represent Artifact: Design Subsystem. See Guideline: Design Subsystem for more on this topic.
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