use case diagram for library management system

varchar (+) not NULL, PRIMARY KEY (books_id), KEY name (Books_name), KEY Publisher (publisher_id), KEY date_pub (date_pub), KEY Price, KEY pages (pages), KEY type (type), KEY ISBN (ISBN) ); # -------------------------------------------------------- # # The structure of the data table ' Books_author ' # CREATE TABLE Books_author ( ID Int (6) DEFAULT ' 0 ' not NULL auto_increment, books_id varchar (6) Not NULL, author_id varchar (6) Not NULL, Author_type varchar (6) Not NULL, PRIMARY KEY (ID) );

interface of vehicles2. Engine assembled into cars, car radios converged into cars3. Taxis are inherited from automobiles4. The taxi and the driver are many to many two-way correlation relations, the driver one-way correlation driving licence (one driver holds a driving licence)5. Drivers rely on onboard WiFi Use case diagram example

Use case diagram The use case diagram describes a functional unit provided by the system. The purpose of the use

In the previous article "UML System Analysis and Design 02-use case diagram and activity diagram (I)", we mainly explained the use case analysis and drawing methods and techniques in re

, you should useRoleMark. Role tags are similar to instance tags. To create a role model for a class, you can draw a square and place the role name and Class Name of the class inside as the entity mark, but in this case, you cannot underline it. Note: A significant difference between a role diagram and an object diagram is that each object name in an object

case diagram 12.png "alt=" Wkiol1gz-qwd5hmeaadtezbu2tk282.png "/>Generalization diagram:650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M00/89/B4/wKiom1gZ-t_y-59-AAFYVcaJ6Xg142.png "title=" Generalization relationship. png "alt=" Wkiom1gz-t_y-59-aafyvcaj6xg142.png "/>Included in the extension diagram:650) this.

The key to dealing with object-oriented problems is modeling. Modeling can abstract many important details in the complex world. Many Modeling tools encapsulate UML (that is, uniied Modeling Language ). There are nine types of modeling icons in UML: Use case diagram Class Diagram Object Graph Sequence Chart

things they can do (behavior or operation behaviors or operations ). The attribute value of an object determines its State. Class classes is the "blueprint" of the object ". A class encapsulates attributes (data) and behaviors (methods or functions) in a separate entity ). The object is the instance instances of the class. Use case diagram

functions) in a separate entity ). The object is the instance instances of the class. Use case diagram Use case diagram Use case diagrams t

of being able to add multiple abstract methods with stronger representation capabilities. 3) Association class Like a class, association can also have its own attributes and operations. In this case, this association is actually an association class. An association class is both an association and a class. It connects two classes like an association, and can define a group of characteristics that belong to the association itself. Note: you can creat

This articleArticle, There will be substantial progress. First, I sorted out a general example of the demand. I thought the granularity was already very fine, and I couldn't do it again. I still firmly believe in one principle: never do anything I do in my spare time. If you want to eat a fat man, it's easy for the project to get aborted ~, Not much nonsense. 1. The overall system use

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,

the system use case diagram 1. Do not "mesh" Many people like to analyze all the use cases with a picture to show, small system Fortunately said, the system becomes a spider web, messy

Background Previous: Using Visual Studio 2010 from Analysis to implementation (2)--using activity diagram to refine business processes The brother who is unfamiliar with the use case diagram please refer to: http://www.ibm.com/developerworks/cn/rational/r-usecase-atm/ The Visual Studio 2010 development team's role i

Introduction The database design phase of the data room charging system was completed a few days ago. After the completion, I was not in the next stage, for fear, I am afraid that the professional courses and advanced courses do not have a reasonable plan of time, which leads to chaos on a daily basis. I am afraid that my thinking will fall into the dilemma that I don't know which one to learn, and eventually I will not learn anything, therefore, I

Object-oriented modelObject-oriented model is a model that uses UML (Unified Modeling Language) to describe the system structure, and it realizes the working state of the system from different angles. These graphs facilitate information exchange between users, managers, system analysts, developers, testers, and other personnel. This article mainly introduces

Object-oriented model Object-oriented model is a model that uses UML (Unified Modeling Language) to describe the system structure, which realizes the working state of the system from different angles. These graphics help communicate information between users, managers, system analysts, developers, testers, and others. This article mainly introduces

Http://www.cnblogs.com/zhaolijing/archive/2013/02/28/2936321.html UML use case diagram-detailed tutorial I. Definition of use case diagram: ByActors and Use Cases)And the relation

parameters can not increase or decrease. Although it is sometimes permissible to add new operations, the semantics (or behavior) of the operation should remain the same.Implementation--The implementation of the component can be arbitrarily changed according to the underlying database, algorithm (such as sort) used, as long as the behavior of the customer's concern is not affected, and can even be written in different programming languages.Use case di

Class diagrams and sequence diagrams are directly associated with program code in software system design. To be precise, program code is directly generated by class diagrams, A Sequence Chart can define a class chart method. The use case diagram is used to describe system fu