uml use case diagram tool

extension (Extension) use case, and then extends it from the extension point (Extension points) declared in the base use case to make the base case more concise and more focused. The extension use

Recently has been learning the basic knowledge of UML, after watching the video, and did not have a good summary, in the process of drawing found a lot of problems, the following is the process of reading their own summary of the UML use case diagram of a little knowledge, s

as an inheritance relationship. Child cases are similar to parent cases, but show more special behaviors. Child Cases inherit all structures, behaviors, and relationships of the parent case. A child use case can use a behavior of the parent use

In all UML diagrams, the most easy to understand is the use case diagram, which is also a UML diagram with the least elements, and also the most handy one for product managers. I. Purpose The

The previous blog summarized the use case diagram, in which the relationship between use cases is only included, because the relationship between use cases is not particularly profound. This is also because the UML

The use case diagram mainly includes use cases, activists, and relationships. Use Cases: A description of the sequence of actions that the system, subsystem, or class interacts with external participants, including various normal sequences and error sequences.

The use case diagram is used to describe the relationship between users, requirements, and system functional units. It shows a system functional model diagram that can be observed by external users. [PURPOSE]: help the development team understand the functional requirements of the system in a visual manner. The

Use case diagram Structure 1Roles: Personnel roles-people and events; Roles are not necessarily limited to people. They can also be things or things. 2. Use Case: function description; Each use

Use Case Diagrams are used to determine the scope of requirements. These requirements are the basis for design and development. The use case diagram treats the system as a black box and understands the system from the perspective of external executors. As shown in Figure 12.

UML Use case diagram A use case diagram is the first step in the analysis of software requirements to the fi

and generalization in UML [conversion] Three relationships: Between Generalized participants and Use Cases Online Ordering by telephone Between extension cases Maintenance-Add entry inclusion Drink between use cases-open bottle caps Generalized representation is similar to the OO term "inheritance" or "polymorphism ". The general process of

UML Case Diagram (use cases) arrow direction:Always forget the direction of the arrows, provoke jokes.1, association, no arrows, actor connection usecase can;2, Directedassocition,actor connection UseCase, arrow by actor point to usecase (role point use

ArticleDirectory (1) from the perspective of general users (2) From the operator's perspective (3) from the Administrator's perspective Drawing a use case diagram is the first step from the software requirement to the final implementation. Its correctness directly affects the user's satisfaction with the final product. In fact, we can also s

Use case diagram: used to describe the relationship between users, requirements, and system function units. It shows a system function model diagram that can be observed by external users. Main Purpose: To help developers understand the functional requirements of the system in a visualized manner Take a look at the fol

the extension use case adds new behavior to the base use case Diagram Description: Association: Depend on: Generalization: Contains: Extended: Two. Role: Describe the needs of the user (emphasizing the function, the performer of the function, the system in

Example Defining system boundaries determines the boundaries between the system's interior and exterior. The main character represents the role played by the external object. An object can assume several roles, so it can be represented by several leading roles. Communication relationships are used to clarify the participation of the main character in the use case. A