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Structured Development for Real-Time Systems by Stephen J. Mellor, Paul T. Ward

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Chapter 7. Specifying Control Transformations

Basic concepts

The transformation schema describes the behavior of a system by giving names to transformations and showing the data and control connections among the transformations.

We have defined a notation for both data and control transformations and described the differences between them. We have also introduced the event flow and the control store as analogs of the data flow and the data store.

We must now concentrate on defining what a control transformation does, provide tools to model its behavior, and describe how it uses event flows and event stores.

The control transformation as a mapping

A control transformation maps input event flows into output event flows. Since event flows are fundamentally ...

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