Shulou(Shulou.com)06/01 Report--

This article mainly shows you "how to create a UML sequence diagram in EA", the content is easy to understand, clear, hope to help you solve your doubts, let the editor lead you to study and learn "how to create a UML sequence diagram in EA" this article.

Create a sequence diagram

After entering the [New Diagram] dialog box, enter the name, select [Sequence] in [UML Behavioral] and press the [OK] button.

An example of a timing diagram

This article continues to use the examples of graphic editing software from the previous article.

First of all, the graphic editing software is described in natural language (hereinafter referred to as editing software):

1. The user visually goes from the on-screen to the current state of the editing object.

two。 The user operates through the mouse (key press, key release, drag)

3. The system architecture accepts the conversion of user actions into events and distributes them to the editing software.

4. After accepting the event, the editing software will deal with it according to the current state.

5. Notify schema updates to represent content

6. The system architecture calls the update processing of the editing software.

7. The editing software calls the system architecture to represent the editing object on the screen

8. The user sees the presentation on the screen

9. Go back to step 1 and continue until the software exits.

This example is drawn as a sequence diagram like this:

Description of the elements of the sequence diagram

Participant (Actor)

The participant is the initiator of the out-of-model action, and when the designer wants to say someone, something can be replaced by a participant.

Lifeline (Lifeline)

The lifeline of an object is a vertical dotted line that represents the period of time for which the object exists.

Message

A message is a solid arrow from the lifeline of one object to the lifeline of another.

Execution instructions (execution specification)

The execution instructions are represented on the sequence diagram as a slender rectangle up and down, indicating an interval of processing from start to finish. In UML prior to 2. 0, the execution instructions were called Activation. This term is still used in EA.

The above is all the contents of the article "how to create a UML sequence Diagram in EA". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.