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Journal of Logic and Computation 1990 1(2):187-227; doi:10.1093/logcom/1.2.187
© 1990 by Oxford University Press
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Original Articles

Logics of Modal Terms for Systems Specification

JOSÈ FIADEIRO* 1 and AMÌLCAR SERNADAS{dagger}

*Department of Computing, Imperial College of Science Technology and Medicine 180 Queen's Gate, London SW1 2BZ, UK
{dagger}Department of Mathematics, Instituto Superior Tècnico, Av. Rovisco, Paris 1096 Lisboa Codex, Portugal

The use of modal qualification on terms is advocated for a more intuitive account of the description of the effects of events on objects such as program variables or database attributes, and also for an easier verification of the intended temporal integrity constraints. We develop two logics of modal terms focusing on positional and temporal qualification, and show by means of an example how they can be used to support the description and prescription of actions, as well as to reason about the properties of the specified systems.


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