>UML Use Case Diagram Symbols Posted byAllison Lynch| Pre-drawn UML use case diagram symbols represent actor, use case, package, object, interface, constraint and note, etc. These symbols help create accurate diagrams and documentation.
【用途】:帮助开发团队以一种可视化的方式理解系统的功能需求。 用例图中包含6个元素,分别是执行者(Actor),用例(Use Case),关联关系(Association),包含关系(Include),扩展关系(Extend)以及泛化关系(Generalization)。 角色(Actor):即使用本系统的有哪些角色,不同的角色使用的系统功能部分是不同的,在用例图中用小人...
Use case diagrams contain a combination of different elements and specialized symbols and connectors. Whether you want your use case diagram to be simple or in-depth, it should include the following basic components: Actors– An actor is anyone who performs an action using your system. Actors or...
Use case diagram symbols and notation The notation for a use case diagram is pretty straightforward and doesn't involve as many types of symbols as other UML diagrams. You can use this guide to learn how to draw a use case diagram if you need a refresher. Here are all the shapes you ...
知识点:用例图(Use Case Diagram) 知识点:该题目考查的是面向对象的分析与设计方法(Object-Oriented Analysis and Design, OOAD),特别是用例图(Use Case Diagram)的相关知识点。用例图是UML(统一建模语言)中的一种图表,用于描述系统的功能需求,它展示了系统如何与外部用户或其他系统交互。
用例图体现了该系统能够为参与者提供的种种功能以及这些功能之间的联系。要画好一张用例图,需要把握三个元素:参与者(Actor)、用例(Use Case)和用例间的关系(Relationship)。 一、 参与者 参与者代表的是参与使用系统的一类角色,例如,读者就是图书馆这个系统的参与者。要正确把握参与者,需要注意以下几点: ...
用例图例子 / Use Case Diagram Example 用例图 用例图描述了系统从外部观察者的角度所做的工作。重点是什么样的系统呢,而不是如何。 用例图与场景密切相关。一个场景是某人与系统进行交互时发生的情况的一个例子。这是一个医疗诊所的场景。 “病人打电话给诊所预约每年检查一次,接待员找到预约簿中最近的空白时间...
用例(use case):系统功能 图形:如下图是登录功能 用例.png 每个用例都有一个名称:短小精悍的“动名词”如例如ATM系统,经典的用例有“取钱” “存钱”“修改密码”等。 参与者(actor):用户或者外部系统 图形: 参与者.png 对每一类参与者要有简短描述:如 学生:需要参加培养计划规定的课程,并通过考核 ...
Basic Use Case Diagram Symbols and Notations System Draw your system's boundaries using a rectangle that contains use cases. Place actors outside the system's boundaries. Use Case Draw use cases using ovals. Label the ovals with verbs that represent the system's functions. ...
A use case diagram shows the interaction between the system and entities external to the system. These external entities are referred to as actors. Actors represent roles which may include human users, external hardware or other systems. An actor is usually drawn as a named stick figure, or al...