simple uml diagram tool

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 expresses the functions of the system, that is, the services provided by the system. A Use Case chart is a visualization tool used to describe use cases. It uses simple graphical

arrows point to classes that are aggregated.　　2.6 combination (Aggregation) relationshipA combinatorial relationship is a relationship between a whole and a part of a class, such as a frog with four legs, and a relationship between a frog and a frog's leg class. In a UML class diagram, a composite relationship is represented by a solid diamond + solid arrowhead, and the arrow points to the grouped class.2.

The following is a Library management system state diagram, very typical, covering the use of all the elements of the state diagram, because the state diagram is relatively simple, directly from the view of the picture can be very well mastered. Suppose you want to understand the concept of the element rigor of the sta

I. Introduction to UML Use case modeling Use case modeling is part of UML modeling, and it is the most basic part of UML. The most important function of use case modeling is to express the functional requirements or behavior of the system. According to my understanding use case modeling can be divided into use case diagrams and use case descriptions. Use-case dia

in the following designs? Facilitate the analysis of requirements and facilitate the storage of database information Attached: E-r chart Part8 What part of the system is described here? The relationship between the administrator, the user, and the backend. What kind of problems will this part face? Different role permissions, functional induction What issues are addressed in the following designs? Get a better understanding

Currently the more popular UML modeling tools include Visio, Rational Rose, PowerDesigner, EA, and so on, basically enterprise-class software, powerful, I have only used Visio, so do not add to their characteristics or similarities and differences. For more formal scenarios, such as graphics as part of a project document, the software listed above is recommended. When we encounter more complex code logic or business logic at work, it is easier to unde

diagram is the backbone of UML, so you can find that they are available at any time. The biggest trouble with class diagrams is that they contain too many things. So they may be overused. Here are some tips to use:A, do not try to use all the notation that can be used. Let's start with some of the things that are mentioned in this chapter: categories, associations, attributes, generalized relationships and

combinatorial relationship is a relationship between a whole and a part of a class, such as a frog with four legs, and a relationship between a frog and a frog's leg class. In a UML class diagram, a composite relationship is represented by a solid diamond + solid arrowhead, and the arrow points to the grouped class.2.7 Association (composition) relationshipAssociation relationship is a kind of relationship

UML Class Diagram Relations Daquan1. AssociationBidirectional Association:C1-C2: Refers to both sides know each other's existence, can call each other's public properties and methods.This is described in the GOF design pattern book: Although this relationship is applicable in the analysis phase, we feel that it is too abstract to describe the class relationship within the design pattern, because the associa

Reading videos or tool books, including summaries, is in the theoretical stage. "The last word on the paper is superficial. I know that this is a must ." Now we are in the UML document stage, and it won't work unless we do it. I have done the "Data Center Charging System" before. To put it bluntly, I am blind. I have no rules to follow the feeling. The training solution provides the following explanation: "

Get the analysis finished product demand is the line design UML (with class diagram) or the first design database? Reply content: Get the analysis finished product demand is the line design UML (with class diagram) or the first design database? I first design the database,