Class Diagram - Association Notation

This section describes the Association Notation used in a UML Class Diagram. An Association Notation presents an association relation between two classes in which one class is related to the other class.



An Association Notation is a graphical notation used in a UML Class Diagram to represent an association relation between two classes in which one class is related to the other class.

An Association Notation is drawn as a solid line with two ends connected to the related classes. An Association Notation can also have a text label placed along the association line to describe the relation. A small solid triangle can be used to point away from the first class to the second class to imply that the label should be read as "<first class> <label> <second class>".

For example, the "Student" class and the "Class" class have an association that "A student is registered in a class". The association can be drawn as an Association Notation in a UML class diagram as shown below:

UML Notation Shapes - Class Association
UML Notation Shapes - Class Association

See next sections for other features of Association Notations.



 

Table of Contents

 About This UML Tutorial Book

 Introduction of UML (Unified Model Language)

UML Class Diagram and Notations

 What Is a Class Diagram?

 Class Diagram - Class Notation

Class Diagram - Association Notation

 Class Diagram - Association End Notation

 Class Diagram - Association End Navigability Notation

 Class Diagram - Aggregation and Composition Notations

 Class Diagram - Generalization Notation

 Class Diagram - Realization Notation

 Class Diagram - Dependency Notation

 UML Activity Diagram and Notations

 UML Sequence Diagram and Notations

 UML State Machine Diagram and Notations

 UML Use Case Diagram and Notations

 MS Visio 2010 - UML Drawing Tool

 References

 Full Version in PDF/EPUB