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Lizenz
Report (Bericht) zugänglich unter
Decidable reasoning in terminological knowledge representation systems
URN: urn:nbn:de:bsz:291-scidok-36500
URL: http://scidok.sulb.uni-saarland.de/volltexte/2011/3650/
Quelle:
(1993) Kaiserslautern ; Saarbrücken : DFKI, 1993
pdf-Format:
Dokument 1.pdf (304 KB)
SWD-Schlagwörter:
Künstliche Intelligenz
Institut:
DDC-Sachgruppe:
Informatik
Dokumentart:
Report (Bericht)
Schriftenreihe:
Research report / Deutsches Forschungszentrum für Künstliche Intelligenz [ISSN 0946-008x]
Bandnummer:
93-10
Sprache:
Englisch
Erstellungsjahr:
1993
Publikationsdatum:
27.06.2011
Kurzfassung auf Englisch:
Terminological Knowledge Representation Systems (TKRS) are tools for designing and using knowledge bases that make use of terminological languages (or concept languages). We analyze from a theoretical point of view a TKRS whose capabilities go beyond the ones of presently available TKRS. The new features studied, all of practical interest, can be summarized in three main points. First, we consider a highly expressive terminological language, called ALCNR, including general complements of concepts, number restrictions and role conjunction. Second, we allow to express inclusion statements between general concepts, and terminological cycles as a particular case. Third, we prove the decidability of a number of desirable TKRS-deduction services (like satisfiability-, subsumption- and instance checking) through a sound, complete and terminating calculus for reasoning in ALCNR-knowledge bases. Our calculus extends the general technique of constraint systems and can be easily turned into a procedure using exponential space. As a byproduct of the proof, we get also the result that inclusion statements in ALCNR can be simulated by terminological cycles, if descriptive semantics is adopted.
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