Supporting open and closed world reasoning on the web

  • Authors:
  • Carlos Viegas Damásio;Anastasia Analyti;Grigoris Antoniou;Gerd Wagner

  • Affiliations:
  • Centro de Inteligência Artificial, Universidade Nova de Lisboa, Caparica, Portugal;Institute of Computer Science, FORTH-ICS, Greece;Institute of Computer Science, FORTH-ICS, Greece;Institute of Informatics, Brandenburg Univ. of Technology at Cottbus, Germany

  • Venue:
  • PPSWR'06 Proceedings of the 4th international conference on Principles and Practice of Semantic Web Reasoning
  • Year:
  • 2006

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Abstract

In this paper general mechanisms and syntactic restrictions are explored in order to specify and merge rule bases in the Semantic Web. Rule bases are expressed by extended logic programs having two forms of negation, namely strong (or explicit) and weak (also known as default negation or negation-as-failure). The proposed mechanisms are defined by very simple modular program transformations, and integrate both open and closed world reasoning. These program transformations are shown to be appropriate for the two major semantics for extended logic programs: answer set semantics and well-founded semantics with explicit negation. Moreover, the results obtained by both semantics are compared.