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SEMWEB
2010
Springer
13 years 7 months ago
2010
Springer
Abstract. In order to effectively and quickly answer queries in environments with distributed RDF/OWL, we present a query optimization algorithm to identify the potentially relevan...
ICDT
1995
ACM
14 years 1 months ago
1995
ACM
A tuple t1 of relation R subsumes tuple t2 of R, with respect to a query Q if for every database, tuple t1 derives all, and possibly more, answers to query Q than derived by tuple ...
ASP
2003
Springer
14 years 3 months ago
2003
Springer
Abstract. Answer Set Programming (ASP) is a formalism widely used for knowl
AWIC
2005
Springer
14 years 3 months ago
2005
Springer
Abstract. Answer validation is an important component of any question answering system. In this paper we show how the formalism of prioritized fuzzy constraint satisfaction allows ...
PAKDD
2010
ACM
14 years 2 months ago
2010
ACM
We present a novel graph ranking model to extract a diverse set of answers for complex questions via random walks over a negative-edge graph. We assign a negative sign to edge weig...