Behavior that accompanies a transition event. An action is considered to take zero time and cannot be interrupted.
Behavior that occurs while in a state. An activity can be interrupted by a transition event.
Someone or something external to the system that must interact with the system under development.
A stronger form of an association where the relationship is between a whole and its part(s).
The logical and physical structure of a system, forged by all the strategic and tactical design decisions applied during development.
A bidirectional, semantic connection between two classes.
A class that holds information belonging to a link between two objects and not with ...