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:
UML Notation Shape - Action

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.

Table of Contents

 About This UML Tutorial Book

 Introduction of UML (Unified Model Language)

 UML Class Diagram and Notations

UML Activity Diagram and Notations

 What Is an Activity Diagram?

Activity Diagram - Action Notation

 Activity Diagram - Control Flow Notation

 Activity Diagram - Start and Final Notations

 Activity Diagram - Decision Notation

 Activity Diagram - Merge Notation

 Activity Diagram - Fork Notation

 Activity Diagram - Join Notation

 Activity Diagram - Object Notation

 Activity Diagram - Send Signal Notation

 Activity Diagram - Accept Event Notation

 Activity Diagram - Partition (Swimlane) Notation

 Activity Diagram - Frame Notation and Parameters

 UML Sequence Diagram and Notations

 UML State Machine Diagram and Notations

 UML Use Case Diagram and Notations

 MS Visio 2010 - UML Drawing Tool

 References

 PDF Printing Version