Models for Concurrent Constraint Programming

Vineet Gupta, Radha Jagadeesan, Vijay A. Saraswat


Concurrent Constraint Programming (CCP) is a simple but powerful framework for computation based on four basic computational ideas: concurrency (multiple agents are simultaneously active), communication (they interact via the monotonic accumulation of constraints on shared variables), coordination (the presence or absence of information can guard evolution of an agent), and localization (each agent has access to only a finite, though dynamically varying, number of variables, and can create new variables on the fly). Unlike other foundational models of concurrency such as CCS, CSP, Petri nets and the pi-calculus, such flexibility is already made available within the context of determinate computation. This allows the development of a rich and tractable theory of concurrent processes within the context of which additional computational notion such as indeterminacy, reactivity, instantaneous interrupts and continuous (dense-time) autonomous evolution have been developed.

We survey the development of some of these extensions and the relationships between their semantic models.

© Springer Verlag, 1996. Published in the Lecture Notes in Computer Science Series.

  title =        "Models for Concurrent Constraint Programming",
  author =       " Vineet Gupta and Radha Jagadeesan and Vijay Saraswat"
  pages =        "66--83",
  booktitle =    "CONCUR~'96: Concurrency Theory, 7th International
  editor =       "Ugo Montanari and Vladimiro Sassone",
  address =      "Pisa, Italy",
  month =        "26--29~" # aug,
  year =         "1996",
  series =       "Lecture Notes in Computer Science",
  volume =       "1119",
  publisher =    "Springer-Verlag"
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