The Concepts
The following UML, object-oriented, and other concepts are cited in this chapter. For a more complete discussion and more rigorous definitions of UML concepts, refer to Booch et al. [1999].
Use case model— typically refers to the use case model of the information system being built versus the business use case model. It is a depiction of how the system capabilities (depicted as use cases) are used by the actors.
“Extends”— a stereotype of a relationship that indicates an optional use case flow that may be executed, based on a specific criterion.
“Includes”— a stereotype of a relationship that indicates a use case flow that is inserted into another use case or use cases at one or more points.
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