UML use case extend relationship is used to show how and when some optional extending use case can be inserted into extended (base) use case.

UML use case extend relationship is used to show how and when some optional extending use case can be inserted into extended (base) use case. For example, Registration use case could be extended with optional Get Help On Registration use case.

UML use case include relationship shows that behavior of the

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Use Case Diagram Examples

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UML use case include relationship shows that behavior of the

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UML Use Case extend and include relationships

Use Case Diagram Examples

SPC Use Case Model Extension Points are represented by the string

Use case diagrams are UML diagrams describing units of useful

UML Use Case Diagrams: Diagramming Guidelines