Observational and behavioural equivalences for soft concurrent constraint programming

We present a labelled semantics for Soft Concurrent Constraint Programming (SCCP), a meta-language where concurrent agents may synchronise on a shared store by either posting or checking the satisfaction of (soft) constraints. SCCP generalises the classical formalism by parametrising the constraint...

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Bibliographic Details
Published in:	Journal of logical and algebraic methods in programming Vol. 92; pp. 45 - 63
Main Authors:	Gadducci, Fabio, Santini, Francesco, Pino, Luis F., Valencia, Frank D.
Format:	Journal Article
Language:	English
Published:	Elsevier 01.11.2017
Subjects:	Computer Science Distributed, Parallel, and Cluster Computing Logic in Computer Science Soft Constraints Semantics of Programming Langages Concurrent Constraint Programming
ISSN:	2352-2208
Online Access:	Get full text
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Summary:	We present a labelled semantics for Soft Concurrent Constraint Programming (SCCP), a meta-language where concurrent agents may synchronise on a shared store by either posting or checking the satisfaction of (soft) constraints. SCCP generalises the classical formalism by parametrising the constraint system over an order-enriched monoid, thus abstractly representing the store with an element of the monoid, and the standard unlabelled semantics just observes store updates. The novel operational rules are shown to offer a sound and complete co-inductive technique to prove the original equivalence over the unlabelled semantics. Based on this characterisation, we provide an axiomatisation for finite agents.
ISSN:	2352-2208
DOI:	10.1016/j.jlamp.2017.06.001