UML associations

During my course on my job the topic UML associations was a short discussion. What is the difference between Composition, Aggregation and Assocation. In Dutch, read here for more details

Association: The object which have a relation with eachother are equal. For example a person drives a car.


Aggregation: One object is owner of the other object. For example a department and a person which is 'chief of the deparment'

Composition: One object is owner of the other object. But when the owner is deleted to other object is useless. For example a Room belongs to a house. When the house is destroyed the room doesnot exists anymore.

See for more details Wikipedia