In UML (Unified Modeling Language) there are various TYPES of relationships for the object-oriented SYSTEM. Association and Aggregation are also a TYPE of relationship in UML.

Aggregation: Aggregation is a SPECIFIC type of association between two or more objects. In Aggregation, objects can have their lifecycle with ownership. It is a one-directional association. If we destroy one object, it will not affect another one. It is also called as HAS-A relationship.

Association: Association is a relation between two objects with their own lifetime and without any ownership. An association relationship can be represented by the following type:

• One-to-one
• One-to-many
• Many-to-many

The aggregation and composition are the part of the association.

In UML (Unified Modeling Language) there are various types of relationships for the object-oriented system. Association and Aggregation are also a type of relationship in UML.

Aggregation: Aggregation is a specific type of association between two or more objects. In Aggregation, objects can have their lifecycle with ownership. It is a one-directional association. If we destroy one object, it will not affect another one. It is also called as HAS-A relationship.

Association: Association is a relation between two objects with their own lifetime and without any ownership. An association relationship can be represented by the following type:

The aggregation and composition are the part of the association.