Question between aggregations, compositions, references (arrow) and simple link (nothing) relations within UML2 ?

Posted by Rushino on Programmers See other posts from Programmers or by Rushino
Published on 2011-02-11T02:01:03Z Indexed on 2011/02/11 15:32 UTC
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Hello,

I have some questions regarding relations between aggregations, compositions, references (arrow) and simple link (nothing) relations within UML2 ?

If A -> B -> C each have composition relationship. Are the root responsable of creation and destruction of the object B and C ?
What aggregations have that the simple link or references doesn't ? What make them different ?

Thanks.

Edit: The question was a bit unclear and not objective. I edited it.

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