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What is extends and includes in use case?
Include = reuse of functionality (i.e. the included functionality is used or could be used elsewhere in the system). Include therefore denotes a dependency on another use case. Extends = adding (not reusing) functionality and also any optional functionality.
What is dependency in use case diagram?
In UML, a dependency relationship is a relationship in which one element, the client, uses or depends on another element, the supplier. As the following figure illustrates, a dependency is displayed in the diagram editor as a dashed line with an open arrow that points from the client to the supplier.
What is actor generalization and use case generalization?
In the context of use case modeling the actor generalization refers to the relationship which can exist between two actors and which shows that one actor (descendant) inherits the role and properties of another actor (ancestor).
What is an actor in use case diagram?
An actor in use case modeling specifies a role played by a user or any other system that interacts with the subject. An Actor models a type of role played by an entity that interacts with the subject (e.g., by exchanging signals and data), but which is external to the subject.
What are the different types of actors in a use case?
Actors can be people, other systems, time triggers, or event triggers. An actor specifies a role played by a user or any other system that interacts with the subject. It may represent roles played by human users, external hardware, or other subjects.
What is a use case package?
A use-case package is a collection of use cases, actors, relationships, diagrams, and other packages; it is used to structure the use-case model by dividing it into smaller parts.
What are the three types of actors?
Acting can easily be broken down into three different kinds: stage acting, screen acting, and being a movie star. Each category of acting is very different from one another, with each one having very different requirements.