UML Tutorials - Herong's Tutorial Examples - Version 1.01, by Dr. Herong Yang
Activity Diagram - Action Notation
This section describes the Action Notation used in a UML Activity Diagram. An Action Notation represents an action which is the fundamental unit of behavior specification.
An Action Notation is the primary graphical notation used in a UML Activity Diagram to represent an action, which is the fundamental unit of behavior specification.
An Action Notation is drawn as a rectangle shape with strongly rounded corners.
The action name is printed inside the shape.
For example, the "Keep Dreaming" action can be drawn as an Action Notation in a UML activity diagram as shown below:
Note that in some UML drawing tools, the Action Notation is called Action State notation and drawn as a shape with straight top and bottom and convex arcs on the two sides.
Last update: 2014.
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