What is an association in a class diagram?

In UML diagrams, an association class is a class that is part of an association relationship between two other classes. You can attach an association class to an association relationship to provide additional information about the relationship.

What is association in UML with example?

An association class is identical to other classes and can contain operations, attributes, as well as other associations. For example, a class called Student represents a student and has an association with a class called Course, which represents an educational course. The Student class can enroll in a course.

What are the three parts of a class diagram?

The standard class diagram is composed of three sections:

  • Upper section: Contains the name of the class. This section is always required, whether you are talking about the classifier or an object.
  • Middle section: Contains the attributes of the class.
  • Bottom section: Includes class operations (methods).

How to create an association in a class diagram?

To define an association line in the Class Diagram. In the Toolbox, under Class Designer, select Association. Draw a line between the two shapes you want to link with an association. A new property is created in the first class.

How are association lines used in class designer?

Association lines in Class Designer show how classes in a diagram are related. An Association line represents a class that is the type of a property or field of another class in your project. Association lines are generally used to illustrate the most important relationships between classes in your project.

How to create an association in Visual Studio?

On the diagram surface, click the label of the association line and edit it. Alternatively, follow these steps: Select the shape that contains the property that is shown as an association. The shape obtains focus and its members display in the Class Details and Properties windows.

How to create an association between two shapes?

In the Toolbox, under Class Designer, select Association. Draw a line between the two shapes you want to link with an association. A new property is created in the first class. This property displays as an association line (not as a property within a compartment in the shape) with a default name.