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This article mainly introduces how to use EA to create UML activity diagrams, the article introduces in great detail, has a certain reference value, interested friends must read it!

Create an activity diagram

When adding graphics, select [UML Behavioral] for classification and [Activity] for graphics category to generate activity diagrams.

The basic elements of an activity diagram

Actions and activities

Designers create activity diagrams to express things that happen in a certain order. Some of them are relatively simple, such as performing a simple mathematical operation, sending a signal, or calling a system function, etc., and those that are no longer (or cannot) be further decomposed during modeling are called actions (action); others are relatively complex and have visible substructures that can be further decomposed as activities (activity).

To put it simply, it is the activity that can include the subordinate action, and the action that cannot contain the subordinate action. In EA, use the following icons to create.

Control flow

When an action or activity ends, the execution focus of the system shifts to the next action or activity. The arrow symbol used to express this shift of focus is the control flow.

Start and end

The logical initial control flow also needs to start somewhere, and this logical initial starting point becomes the initial initial node.

Similarly, after the final action or activity ends, the control flow needs to flow somewhere, and the logical termination point is the end node (final node).

The simplest example

There should be no need to explain.

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