Transferred from: http://www.360doc.com/content/10/1206/23/3123_75672033.shtmlSome time ago participated in the technical lecture of Pangayu teacher, UML modelling technology benefited greatly. I also put some of the usual accumulation and the last harvest summarized in this article, mainly on the use case diagram related knowledge.The
In the UML 9 kinds of diagram, the use case diagram is the more important one kind of diagram, it is the diagram which produces in the system analysis stage, from the function carries on the analysis to the system the model, has p
Original address: http://blog.csdn.net/zhuojiajin/article/details/8657853See the UML video, feel the UML content actually look very clear. When I started to paint, I found out that it was purely a teacher's job. Listen to understand or feel that you understand that it is just an illusion. For the UML diagram or understanding is not thorough enough, of course, now ask yourself to be thorough is also a dream. Although it is an illusion, trait also let m
use case diagram.
composition: System boundaries. Participants. Case. Relationship.
Participant: Actor is not a person, but a role to play when participating in a use case.
If the action of one role is done by another role agent
To learn UML, you must first learn 14 types of UML graphics. To learn graphs, you must first know what elements are on the graphs.
[Note] This document is not a basic tutorial Of the use case diagram, but a graphical Summary of the use case
IntroductionBeef Brisket News Release system looks very feel, a line of feeling, after all, this is a system implementation of the tutorial, including a variety of details, although just looked at 10 episodes around, but deeply by the beef brisket Teacher's explanation of ideas brought in, especially some of the previous learning process neglected details, rice teacher said, At present, learning knowledge, follow-up learning will also be encountered. Really, learning is a circle, this feature is
It is important to clarify the relationship between use cases when drawing a use case diagram. The relationships of use cases include generalization, extended, and include ). Include and extend are the most confusing. Next we will thoroughly clarify the relationship between
Labels: soft test UML object-oriented
An important way for users to communicate with developers is to describe user requirements. Developers can understand the functions of the system from the perspective of users.
A Use Case chart has three main elements: the participant (actor), the use case, and the relationship bet
From http://www.umlonline.org/school/thread-34-1-1.html
Let's take a look at the sample image?
The use case diagram looks pretty good. There is a little person in the diagram, And the use case
Start learning the UML modeling language, starting with the use case diagram. Modeling Tools Select VisioThe use case diagram describes the system functions understood by the participants, the main elements being
Objective
UML is used to describe the entire design process of the system, and for this process produced a UML9 diagram: Use case diagram, Class diagram, object graph, collaboration diagram, sequence
A use case diagram is primarily a graph that represents the main event flow of a system. It is mainly used to describe the needs of customers, that is, users want the system to complete a certain function of the ability to understand the use case is the SOFTWARE function mod
Document directory
The UML use case diagram contains three relationships: (include), (extend), and (generalization ).
Overview
The Use Case attempts to summarize the relationship between roles and systems in the use
use case, and the latter is called the secondary performer of the use case.1, as described in the easy-to-expand core model of Office process Management (1th Edition), the use case in this di
I,Description of the use case diagram
Use Case (Use Case) Refers to the interaction between the system's external things (activists, devices, or external systems) and the system. It e
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 use case diagram is used to describe the relationship between users, requirements, and system functional units. It shows a system function 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
Defined
system boundaries determine the boundaries between the inside and outside of the system.
the protagonist represents the role played by the external object. An object can play several roles, so it can be represented by several protagonists.
communication relationships are used to illustrate the participation of protagonists in use cases.
A use case is a
, the general relationship can be expressed as follows:
The above is an article I have referenced. I think the difference between the three relations is very clear. Based on this, I will combine my own system to explain the project (Online Shopping System) as a whole.**************************************** *************************(1) overall system use case diagram
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.