Open hengyongming opened 3 years ago
I think sometimes it is ambiguous as to whether the relationship is whole-part or not.
If I remember correctly, it was explained that the second one has a clearer whole-part relationship because of the comment // 1 or more tasks which are parts of this action
.
I do agree that the first image might be considered whole-part as well, given the fact that the collection variable is named parts
. However, if the variable is not named as parts
(e.g. named as items
), I will be more confident to say that it is not whole-part.
IIRC, the Box example covers basic class diagram notation only (composition is not among basic notations) In general, use composition if there is strong evidence of a whole-part relationship.
As seen from the images below, why is there a need for composition for one and not the other although both are a list of things?