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» Extending Datatype Restrictions in Fuzzy Description Logics
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DLOG
2006
13 years 8 months ago
Conjunctive Query Answering for Description Logics with Transitive Roles
An important reasoning task, in addition to the standard DL reasoning services, is conjunctive query answering. In this paper, we present algorithms for conjunctive query answerin...
Birte Glimm, Ian Horrocks, Ulrike Sattler
DLOG
2008
13 years 9 months ago
A Hybrid Tableau Algorithm for ALCQ
Abstract. We propose an approach for extending a tableau-based satisfiability algorithm by an arithmetic component. The result is a hybrid satisfiability algorithm for the Descript...
Jocelyne Faddoul, Nasim Farsinia, Volker Haarslev,...
ECAI
1998
Springer
13 years 11 months ago
Description Logics with Concrete Domains and Aggregation
Abstract. We extend different Description Logics by concrete domains (such as integers and reals) and by aggregation functions over these domains (such as min;max;count;sum), which...
Franz Baader, Ulrike Sattler
DLOG
2010
13 years 5 months ago
Distance-based Measures of Inconsistency and Incoherency for Description Logics
Abstract. Inconsistency and incoherency are two sorts of erroneous information in a DL ontology which have been widely discussed in ontology-based applications. For example, they h...
Yue Ma, Pascal Hitzler
LPAR
1999
Springer
13 years 11 months ago
Practical Reasoning for Expressive Description Logics
Abstract. Description Logics (DLs) are a family of knowledge representation formalisms mainly characterised by constructors to build complex concepts and roles from atomic ones. Ex...
Ian Horrocks, Ulrike Sattler, Stephan Tobies