Basic Introduction to UML

Source: Internet
Author: User
What is UML?
Unified Modeling Language (UML), also known as the Unified Modeling language or standard modeling language, is an OMG standard that began in 1997 and is a graphical language that supports modelling and software system development, providing modeling and visualization support for all phases of software development, Includes requirements analysis to specification, to construction and configuration. The development of object-oriented analysis and Design (Ooa&d,ooad) method There was a climax in the late 80 to 90, and UML was the product of this climax. It not only unifies the representations of Booch, Rumbaugh and Jacobson, but also develops them further and eventually unifies the standard modeling language accepted by the public.

The following is a graphical description of 13 in UML

1. Use case diagram: Classification of how the system is used.

2. Class diagram: Shows the classes and their interrelationships.

3. Object graph: Displays only the objects and their interrelationships.

4. Activity diagram: Displays the activity of a person or object in a manner similar to a flowchart.

5. State machine diagram: Displays the various states of objects that have a more interesting or complex life cycle.

6. Communication diagram: Displays messages sent between objects in a certain situation.

7. Sequence diagram: Displays the information with the communication diagram class, but emphasizes the order, not the connection.

8. Package diagram: Shows how the related classes are combined and is useful to developers.

9. Deployment diagram: Displays the machines, processes, and deployment artifacts that have completed the system installed.

10. The component diagram shows reusable components (objects or subsystems) and a period interface.

11. General diagram of Interaction: The steps to use the sequence diagram to hustle and bustle the red activity.

12. Time Graph: Displays the exact time limit for message and object status.

13. Composite structure diagram: Shows the relationship of objects in aggregation or composition, displays interfaces and collaborative objects

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