The Association shape and other related shapes are used in class diagrams and use case diagrams. See the descriptions below.
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For Class diagrams
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Shape |
Description |
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Represents a general relationship between instances of the classes. |
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Represents a relationship that flows in only one direction between instances of the classes. |
For Use Case diagrams
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Shape |
Description |
|---|---|
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Represents the participation of an actor in a use case. |
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Indicates that one use case has a dependency on another. |
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Indicates that a use case is a specific way to achieve goals of the general use case. The hollow arrow head points toward the more general element. The more specific use case is fully consistent with the general use case and includes additional information. |
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Shows how a use case is broken into smaller steps. |
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Shows that one use case adds functionality to another. |
