7 search results - page 1 / 2 » Conjunctive Queries for a Tractable Fragment of OWL 1.1 |
SEMWEB
2007
Springer
13 years 11 months ago
2007
Springer
DLOG
2011
12 years 8 months ago
2011
We show that, although conjunctive queries over OWL 2 QL ontologies are reducible to database queries, no algorithm can construct such a reduction in polynomial time without changi...
SEMWEB
2009
Springer
13 years 12 months ago
2009
Springer
We present a query processing procedure for conjunctive queries in distributed ontology systems where a large ontology is divided into ontology fragments that are later distributed...
DLOG
2011
12 years 8 months ago
2011
We prove co-N2ExpTime-hardness for conjunctive query entailment in the description logic ALCOIF , thus improving the previously known 2ExpTime lower bound. The result transfers to ...
ESWS
2007
Springer
13 years 11 months ago
2007
Springer
Abstract. This work is motivated by experiences in the course of developing an ontology-based application within a real-world setting. We found out that current benchmarks are not ...