Use Case - Difference between Include and Extend Notation
Por um escritor misterioso
Descrição
I see people always struggling with include/exclude notation inside use case diagrams. I think these diagrams could explain it better. use case diagram include…
![Use Case - Difference between Include and Extend Notation](https://www.uml-diagrams.org/use-case-diagrams/use-case-extend-condition.png)
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.
![Use Case - Difference between Include and Extend Notation](https://i.stack.imgur.com/Lg39Q.png)
requirements - Are using <> and <> relationship in this use -case diagram actually same? - Software Engineering Stack Exchange
![Use Case - Difference between Include and Extend Notation](https://d3i71xaburhd42.cloudfront.net/fdca4c62748789333fe688ffe4832cd3ada31186/3-Table1-1.png)
Table 1 from An extension of the use case diagram to model context-aware applications
![Use Case - Difference between Include and Extend Notation](http://www.herongyang.com/UML/UML-Notation-Shape-Extend.jpg)
Use Case Diagram - Extend Notation
![Use Case - Difference between Include and Extend Notation](https://sparxsystems.com/enterprise_architect_user_guide/14.0/images/extenpoint.png)
Extend Enterprise Architect User Guide
![Use Case - Difference between Include and Extend Notation](https://d2slcw3kip6qmk.cloudfront.net/marketing/pages/chart/what-is-a-use-case-diagram-in-UML/UML_use_case_example1-750x731.png)
UML Use Case Diagram Tutorial
![Use Case - Difference between Include and Extend Notation](https://i.stack.imgur.com/uuh9M.jpg)
include or extend in UML? - Stack Overflow
![Use Case - Difference between Include and Extend Notation](http://www.cs.sjsu.edu/~pearce/modules/lectures/ooa/requirements/relations_files/image006.jpg)
Relationships between Use Cases
![Use Case - Difference between Include and Extend Notation](https://www.uml-diagrams.org/use-case-diagrams/use-case-diagram-elements.png)
Use case diagrams are UML diagrams describing units of useful functionality (use cases) performed by a system in collaboration with external users (actors).
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