We use Activity Diagrams to illustrate the flow of control in a system. An activity diagram shows the flow of control for a system functionality; it emphasizes the condition of flow and the sequence ...

Use case diagrams describe a set of actions (called use cases) that a system should or can perform in collaboration with one or more external users of the system (called actors). Each use case should ...

Abstract: Background: In the modeling of object oriented software systems, the UML object diagrams are recognized very useful to complement class diagrams. However, up to now, there exists only one ...