If there is a message on the sequence diagram, there must be an association on the communications diagram, and vice versa.

Question

Quizplus · Accepted Answer

This is because sequence diagrams and communications diagrams are two different representations of the same information. Each message on a sequence diagram corresponds to an association on a communications diagram, and vice versa. Therefore, if there is a message on one diagram, there must be an association on the other diagram representing the same communication.

If There Is a Message on the Sequence Diagram, There