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» A Database Backend for OWL
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DLOG
2011
12 years 11 months ago
On (In)Tractability of OBDA with OWL 2 QL
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...
Stanislav Kikot, Roman Kontchakov, Michael Zakhary...
KDD
1998
ACM
99views Data Mining» more  KDD 1998»
13 years 12 months ago
On the Efficient Gathering of Sufficient Statistics for Classification from Large SQL Databases
For a wide variety of classification algorithms, scalability to large databases can be achieved by observing that most algorithms are driven by a set of sufficient statistics that...
Goetz Graefe, Usama M. Fayyad, Surajit Chaudhuri
ICDE
2009
IEEE
143views Database» more  ICDE 2009»
14 years 9 months ago
iBroker: An Intelligent Broker for Ontology Based Publish/Subscribe Systems
In this paper, we present iBroker, an Intelligent Broker for ontology based publish/subscribe systems which syntactically and semantically match incoming OWL data to multiple user ...
Myung-Jae Park, Chin-Wan Chung
DEXAW
2008
IEEE
91views Database» more  DEXAW 2008»
14 years 2 months ago
Dynamic Taxonomies for the Semantic Web
The semantic web aims at enabling the web to understand and answer the requests from people and machines. It relies on several standards for representing and reasoning about web c...
Pierre Allard, Sébastien Ferré
INAP
2005
Springer
14 years 1 months ago
Using a Logic Programming Language with Persistence and Contexts
Abstract. This article merges two approaches: one dealing with persistence for logic programs, as provided by a relational database back-end and another which addresses the issues ...
Salvador Abreu, Vítor Nogueira