UML aggregation vs association

Question

Here I am, with another question about aggregation and association. I wanted to learn some basics of UML, so I started reading \"UML distilled\" by Martin Fowler. I read bot

Answer 1

To add, I would just suggest to download UML specification from OMG site : best reference and see p 110.

none Indicates that the Property has no aggregation semantics.

shared Indicates that the Property has shared aggregation semantics. Precise semantics of shared aggregation varies by application area and modeler.

composite Indicates that the Property is aggregated compositely, i.e., the composite object has responsibility for the existence and storage of the composed objects (see the definition of parts in 11.2.3).