How to translate "consists of" into an EMF model?

Question

I specified a model, by writing it down:

A consists of B. Each B has a name and points. In B there is C assigned if its points are not fulfilled.

How to translate this example into emf?

UPDATE

Ok I tried a solution:

A is a class and is connected with B which has as an attribute a name and points. However, I really do not have an idea right now how to handle C?

Answer 1

Between A and B you definitely have an association. Since you emphasize the "consists of", it might be it's a 1:1 composite aggregate (i.e. the lifetimes of A and B are coupled).

B has an association to C. Here it sounds like a 0:1 multiplicity. The condition "if .. fulfilled" can't be captured in the static class diagram, since it describes the dynamic behaviour of the system (hence the lower bound 0 above, so that you can use null). It isn't directly clear if points are objects (reference) or a number (attribute).

_{(source: yuml.me)}

That's how I'd do it (via Yuml.me).

As an alternative (depending on the rest of the model), you might find that B actually extends A.