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Unified Modeling Language User Guide, The, Second Edition by Ivar Jacobson, James Rumbaugh, Grady Booch

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Chapter 24. Time and Space

The real world is a harsh and unforgiving place. Events may happen at unpredictable times yet demand specific responses at specific times. A system's resources may have to be distributed around the world—some of those resources might even move about—raising issues of latency, synchronization, security, and quality of service.

Modeling time and space is an essential element of any real time and/or distributed system. You use a number of the UML's features, including timing marks, time expressions, constraints, and tagged values, to visualize, ...

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