Associate elements in a model

Associations are links that allow related objects to communicate.

The product supports the following types of associations:

• Bi-directional association where both objects can send messages back and forth. This type of association is also called a symmetric association. For more information, see Creating bi-directional associations.
• Directed association where only one of the objects can send messages to the other. For more information, see Creating directed associations.
• Aggregation association defines a whole-part relationship. For more information, see Creating aggregation associations.
• Composition aggregation defines a relationship where one class fully contains the other. For more information, see Creating composition associations.