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Combining First-Order Logic and Logic Programming Using Fol-programs. Edition No. 1

VDM Publishing House, May 2008, Pages: 116

The integration of knowledge bases in classical first-order logic (and in particular of ontologies in various description logics) with rule languages rooted in logic programming is receiving considerable attention in the context of current efforts around Semantic-Web languages.
Towards this integration we introduce fol-programs, which combine logic programs under the answer set and the wellfounded semantics with first-order logic knowledge bases and which generalize dl-programs, a closely related approach combining description logics with rules.
Therefore, we define a syntax and a semantics for fol-programs, namely we define minimal model, strong answer set, weak answer set and well-founded semantics for fol-programs, to properly generalize the semantics of ordinary logic programs to fol-programs.
We then show computational properties of fol-programs and prove that fol-programs are more expressive than dl-programs.
Finally, we present our implementation of the well-founded semantics of fol-programs based on the deductive database engine Ontobroker and the automated theorem prover for first-order logic Vampire and discuss representative reasoning experiments on it.

David Henry, Jimmy.
David Henry Jimmy B.Sc(Hons) Env Chemistry and M.Sc Env Mgt and Quality Control Njala University (NU) Sierra Leone. Cert in Public Health John Hopkin Sch USA, Biomedical Sciences CITI USA Sierra Leonean Lecturer, Chemistry Dept, Sch of Envtal Sciences, NU Biomedical Researcher, Pathogen Surveillance Project Mercy Hospital Research Lab, Bo SL
Senesie, Bobson Kallon.
David Henry Jimmy B.Sc(Hons) Env Chemistry and M.Sc Env Mgt and Quality Control Njala University (NU) Sierra Leone. Cert in Public Health John Hopkin Sch USA, Biomedical Sciences CITI USA Sierra Leonean Lecturer, Chemistry Dept, Sch of Envtal Sciences, NU Biomedical Researcher, Pathogen Surveillance Project Mercy Hospital Research Lab, Bo SL