Reasoning in Expressive Description Logics under Infinitely Valued Gödel Semantics

  • Stefan BorgwardtEmail author
  • Rafael Peñaloza
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9322)


Fuzzy Description Logics (FDLs) combine classical Description Logics with the semantics of Fuzzy Logics in order to represent and reason with vague knowledge. Most FDLs using truth values from the interval [0,1] have been shown to be undecidable in the presence of a negation constructor and general concept inclusions. One exception are those FDLs whose semantics is based on the infinitely valued Gödel t-norm (G). We extend previous decidability results for the FDL G-\(\mathcal{ALC}\) to deal with complex role inclusions, nominals, inverse roles, and qualified number restrictions. Our novel approach is based on a combination of the known crispification technique for finitely valued FDLs and an automata-based procedure for reasoning in G-\(\mathcal{ALC}\).


Description Logic Domain Element Role Hierarchy Total Preorders Role Chain 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.Theoretical Computer ScienceTU DresdenDresdenGermany
  2. 2.KRDB Research CentreFree University of Bozen-BolzanoBozen-BolzanoItaly

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