Sequence Diagrams
Sequence diagrams emphasize the time ordering of messages between objects.
Sequence diagrams are used to model the dynamic aspects of a system. These
diagrams use concrete instances of classes, interfaces and components along
with the messages dispached among them in the framework of a scenario that
illustrates a behavior. Interaction diagrams are useful in understanding
how a particular society of objects behave over time.
Figure 1 - Example Sequence Diagram