Lesson 7 - UML - Activity Diagram
In the previous lesson, UML - State Machine Diagram, we introduced the State machine diagram. We learned it maps the states of a certain entity in the system and transitions between these states. In today's UML tutorial, we're going to take a look at the Activity diagram. It uses the same graphical notation as the State machine, so they can be confused with each other sometimes. However, the Activity diagram is used to display the process, not the state. The process is sometime called workflow which includes the individual steps of the work process, the decision-making between them, and eventually other advanced elements. I believe it's unnecessary to say that the Activity diagram belongs to UML behavioral diagrams.
There are 5 elements in the Activity diagram. Let's describe them.
We draw single actions of the process as rounded rectangles with the action name inside.
We draw decisions for transitions between different branches of the process as diamonds. We don't write anything in the diamond, we write different options as guards in square brackets above the
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In this tutorial, we'll explain the Activity diagram's purpose, why is it better than flowcharts, its elements, and a real-world example.
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