Glossary
- abstract class
A class that cannot be directly instantiated.
- abstraction
The essential characteristics of an entity that distinguish it from all other kinds of entities. An abstraction defines a boundary relative to the perspective of the viewer.
- action
An executable computation that results in a change in state of the system or the return of a value.
- active class
A class whose instances are active objects.
- active object
An object that owns a process or thread and can initiate control activity.
- activity
Behavior expressed as a set of actions connected by control and data flows.
- activity diagram
A diagram that shows the flow of control and data from activity to activity. Activity diagrams address the dynamic view of a system.
- actor
A coherent set of ...
Get The Unified Modeling Language User Guide, 2nd Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
