UML Use case diagrams UML(Unified Modeling Language)即统一建模语言,是OMG(Object Management Group)发表的图标式软件设计语言。 UML的功能:可视化、说明、建造、建文档 UML包括: 用例图(Use case...Use case图 Use cases 首先,Use case是所用系统的规格方式。就是在响应外部Actor触发时,系统所执行的功能。
For “include” and “extend” use cases: Click on a shape’s purple node and drag it to the ending shape. Select the endpoint of a line and choose the arrow that indicates the correct direction of the relationship. Add text by double-clicking on a line and typing “include” and “ex...
Include Relationships: If a use case includes the behavior of another use case, draw a dashed arrow from the including use case to the included use case with the label «include». Extend Relationships: If a use case extends the behavior of another use case under certain conditions, draw ...
Structure the use cases with the Include, Extend and Generalization relationships. To create each of these links, click the tool, then the source use case, then the target. See the following section titled Structuring Use Cases. Describe the use cases in more detail. See the following section...
Scenario diagrams Additional information. Name and Description A use case is normally named as a verb-phrase and given a brief informal textual description. Requirements The requirements define the formal functional requirements that a use case must supply to the end user. They correspond to the fun...
The Include and Extend relationships between two use cases have presently an inconsistent definition, since they are represented as stereotyped dependencies, but they are not true dependencies in the metamodel. Besides, the direction of the dependency arrow in the Extend relationship can be misleading...
Indicates that a use case is a specific way to achieve goals of the general use case. Include Shows how a use case is broken into smaller steps. Extend Shows that one use case adds functionality to another. Example: To indicate a relationship between an actor and a use case ...
TheDocument Management System (DMS)use case diagram example below shows the actors and use cases of the system. In particular, there are include and extend relationships among use cases. TheOrder Systemuse case diagram example below shows the actors and use cases involved in the system: ...
arrow having a dotted shaft, similar to the include relationship. The tip of the arrowhead points to the parent use case and the child use case is connected at the base of the arrow. The stereotype "<<extend>>" identifies the relationship as an extend relationship, as shown in Figure 3.5...
Extend between two use cases Include between two use cases They also represent a generalization of a use case. Systems / Packages Systems or packages are UML artifacts that group different elements. These groups are represented as file folders in the diagram. However, it would help if you used...