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» Ranking Approximate Answers to Semantic Web Queries
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ODBIS
2007
Springer
157views Database» more  ODBIS 2007»
14 years 2 months ago
An Extension of SPARQL for RDFS
Abstract. RDF Schema (RDFS) extends RDF with a schema vocabulary with a predefined semantics. Evaluating queries which involve this vocabulary is challenging, and there is not yet...
Marcelo Arenas, Claudio Gutierrez, Jorge Pé...
SEMWEB
2011
Springer
12 years 11 months ago
Watson, more than a Semantic Web search engine
In this tool report, we present an overview of the Watson system, a Semantic Web search engine providing various functionalities not only to find and locate ontologies and semanti...
Mathieu d'Aquin, Enrico Motta
WISE
2005
Springer
14 years 2 months ago
Scalable Instance Retrieval for the Semantic Web by Approximation
Abstract. Approximation has been identified as a potential way of reducing the complexity of logical reasoning. Here we explore approximation for speeding up instance retrieval in...
Holger Wache, Perry Groot, Heiner Stuckenschmidt
SSDBM
2007
IEEE
118views Database» more  SSDBM 2007»
14 years 2 months ago
Database Support for Weighted Match Joins
As relational database management systems are applied to non-traditional domains such as scientific data management, there is an increasing need to support queries with semantics ...
Ameet Kini, Jeffrey F. Naughton
ICDE
2007
IEEE
126views Database» more  ICDE 2007»
14 years 10 months ago
QPIAD: Query Processing over Incomplete Autonomous Databases
Incompleteness due to missing attribute values (aka "null values") is very common in autonomous web databases, on which user accesses are usually supported through media...
Hemal Khatri, Jianchun Fan, Yi Chen, Subbarao Kamb...