Article805
A uniform approach to logic programming semantics
A uniform approach to logic programming semantics
Veröffentlicht: 2005
Journal: Theory and Practice of Logic Programming
Nummer: 1-2Der Datenwert „-2“ kann einem Attribut des Datentyps Zahl nicht zugeordnet werden sondern bspw. der Datenwert „1“.
Seiten: 123-159
Volume: 5
Referierte Veröffentlichung
Kurzfassung
Part of the theory of logic programming and nonmonotonic reasoning concerns
the study of fixed-point semantics for these paradigms. Several different
semantics have been proposed during the last two decades, and some have been
more successful and acknowledged than others. The rationales behind those
various semantics have been manifold, depending on one's point of view,
which may be that of a programmer or inspired by commonsense reasoning, and
consequently the constructions which lead to these semantics are technically
very diverse, and the exact relationships between them have not yet been fully understood. In this paper, we present a conceptually new method, based
on level mappings, which allows to provide uniform characterizations of
different semantics for logic programs. We will display our approach by
giving new and uniform characterizations of some of the major semantics,
more particular of the least model semantics for definite programs, of the
Fitting semantics, and of the well-founded semantics. A novel
characterization of the weakly perfect model semantics will also be
provided.
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Nichtmonotones Schließen, Logikprogrammierung