Sequence Diagram - Execution Specification Notation

This section describes the Execution Specification Notation used in a UML Sequence Diagram. An Execution Specification Notation presents the execution of action unit within a lifeline of an object.

An Execution Specification Notation is a graphical notation used in a UML Sequence Diagram to represent the execution of action unit within a lifeline of an object.

An Execution Specification Notation is drawn as a narrow rectangle shape attached to the lifeline of its object. Sometimes a wider rectangle shape can be used to include the action name. For example, Executions of actions will be triggered in the lifeline of a "Web Server" object to react to incoming messages. These executions can be drawn as a Lifeline in a UML sequence diagram as shown below:
UML Notation Shape - Execution Specification

Note that in some UML drawing tools, Execution Specification Notation is called Activation notation

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

UML Sequence Diagram and Notations

 What Is a Sequence Diagram?

 Sequence Diagram - Lifeline Notation

 Sequence Diagram - Message Notation

Sequence Diagram - Execution Specification Notation

 Sequence Diagram - Frame Notation

 UML State Machine Diagram and Notations

 UML Use Case Diagram and Notations

 MS Visio 2010 - UML Drawing Tool

 References

 PDF Printing Version