Define composition vs. aggregation? Target role?

[pstein]

How can I distinguish between an aggregation and a composition when designing a class model?

Can one say when its an aggreation then on the tab "Target role" the Aggregation drop-down must be set on "shared" whereas for a composition the drop down must show "composite"?

If not: What else is the difference between Aggregation=shared vs. composite?

What does "none" mean ? Just an Association?

Peter

[Geert Bellekens]

Yes,

The AggregationKind of the End of an Association defines wether we talk about a "composition", an "aggregation", or just a plain association.

Geert

[sargasso]

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaarrrrrrrrrrrgggggggggggggggggggg!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


(amend. sorry I'm not sure what caused that response)
b