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CIKM
2008
Springer
14 years 11 months ago
Aggregate queries over ontologies
Answering queries over ontologies is an important issue for the Semantic Web. Aggregate queries were widely studied for relational databases but almost no results are known for ag...
Diego Calvanese, Evgeny Kharlamov, Werner Nutt, Ca...
SEMWEB
2009
Springer
15 years 2 months ago
A Decomposition-Based Approach to Optimizing Conjunctive Query Answering in OWL DL
Scalable query answering over Description Logic (DL) based ontologies plays an important role for the success of the Semantic Web. Towards tackling the scalability problem, we prop...
Jianfeng Du, Guilin Qi, Jeff Z. Pan, Yi-Dong Shen
CADE
2007
Springer
15 years 10 months ago
System Description: E-KRHyper
The E-KRHyper system is a model generator and theorem prover for first-order logic with equality. It implements the new E-hyper tableau calculus, which integrates a superposition-b...
Björn Pelzer, Christoph Wernhard
OTM
2007
Springer
15 years 3 months ago
Fuzzy-DL Reasoning over Unknown Fuzzy Degrees
In this paper we describe a fuzzy Description Logic reasoner which implements resolution in order to provide reasoning services for expressive fuzzy DLs. The main innovation of thi...
Stasinos Konstantopoulos, Georgios Apostolikas
ESWS
2010
Springer
14 years 11 months ago
Dealing with Inconsistency When Combining Ontologies and Rules Using DL-Programs
Abstract. Description Logic Programs (DL-programs) have been introduced to combine ontological and rule-based reasoning in the context of the Semantic Web. A DL-program loosely com...
Jörg Pührer, Stijn Heymans, Thomas Eiter