Associations

The opposite ends of associations connected to the class are also listed in the same way. The section states if the association is derived, or if it is a specialization of another association. The multiplicity of an association end is suppressed if it is ‘*’ (default in UML).

When directed associations are specified in lieu of attributes, the multiplicity on the undirected end is assumed to be ‘*’ (default in UML) and the role name should not be used.