uml sequence diagram online

closely linked.The subsystem in UML uses a rectangular border to represent a subsystem that can write a description of some of the systems: (5) Relationship A relationship is a relationship between a participant and a participant, a use case and a use case, a use case and a participant, usually divided into four types: association, generalization, inclusion,Extended.The following four relationships are included in the standard use case

decoupling. Two-way arrows indicate interdependence. nested : Inside the package can have a package. However, you should try to avoid the use of multi-layer nested package, 2-3-storey. Package diagram example Take the bookstore online ordering system as an example Package Diagrams Precautions -If the package is revoked, then the elements will be removed -Reasonable minimizati

that the sender passes a message to the recipient of the message, and then resumes its activity without waiting for the recipient to return the message or control. The recipient and sender of an asynchronous message are working concurrently. The return message means that the message is returned from the procedure call.Self-correlating messagesRepresents the method's own invocation and one method within an object that invokes another method, such as:Combined fragmentsRepresents a message sent wi

First, the concept: Introduction to the basic concepts of UML: UML:UML (Unified Modeling Language) provides a unified, standard, and visual modeling language for object-oriented software design. It is suitable for describing the whole process of software design which is driven by use case and is architecture-centric. StarUML Use tutorial See http://blog.csdn.net/monkey_d_meng/article/details/5995610/ UML M

As I explained in the introductory column, the sequence diagram is used to describe the internal behavior that the system produces over time. Because system behavior is the result of objects sending messages to each other, the sequence diagram paints the route of those messages as they move between objects. In the fina

Unlike in the past, this time the title contains the names of the two graphs, why the two graphs together to summarize and practice it. Because there are similarities or connections between them, what are these two diagrams for? Let's go into the UML world again and see what these two graphs are. It is well known that in the course of UML modeling of the development system, the system's use case

that emphasizes the organizational structure between objects that send and receive messages. The following image is a process of machine down. Conclusion: The differences and connections between these graphs are very important. Sequence Diagram Collaboration diagram Same point: (1) are interactive graphs that represent interactions between objects,

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

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

. It is possible to draw the behavior between objects in chronological order. in UML , a sequence diagram describes the interaction between objects in a system by a two-dimensional graph. Where the longitudinal axis represents time and the horizontal axis represents the object that participates in the interaction. the composit