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Semantics and Termination of Simply-Moded Logic Programs with Dynamic Scheduling

  • Annalisa Bossi
  • Sandro Etalle
  • Sabina Rossi
  • Jan-Georg Smaus
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2028)

Abstract

In logic programming, dynamic scheduling refers to a situation where the selection of the atom in each resolution (computation) step is determined at runtime, as opposed to a fixed selection rule such as the left-to-right one of Prolog. This has applications e.g. in parallel programming. A mechanism to control dynamic scheduling is provided in existing languages in the form of delay declarations. Input-consuming derivations were introduced to describe dynamic scheduling while abstracting from the technical details. In this paper, we first formalize the relationship between delay declarations and input-consuming derivations, showing in many cases a one-to-one correspondence. Then, we define a model-theoretic semantics for input-consuming derivations of simply-moded programs. Finally, for this class of programs, we provide a necessary and sufficient criterion for termination.

Keywords

Logic Program Logic Programming Predicate Symbol Dynamic Schedule Derivation Step 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Annalisa Bossi
    • 1
  • Sandro Etalle
    • 2
    • 3
  • Sabina Rossi
    • 1
  • Jan-Georg Smaus
    • 3
  1. 1.Università di VeneziaVenezia
  2. 2.Universiteit MaastrichtMaastricht
  3. 3.CWIAmsterdam

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