Semantics and termination of simply-moded logic programs with dynamic scheduling

A. Bossi, S. Etalle, S. Rossi, J.G. Smaus

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    5 Citations (Scopus)


    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.
    Original languageEnglish
    Title of host publicationProgramming languages and systems : proceedings 10th European symposium on programming, ESOP 2001, held as part of the joint European conferences on theory and practice of software, ETAPS 2001, Genova, Italy, april 2-6, 2001
    EditorsD. Sands
    ISBN (Print)3-540-41862-8
    Publication statusPublished - 2001

    Publication series

    NameLecture Notes in Computer Science
    ISSN (Print)0302-9743


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