46 search results - page 3 / 10 » Semantic Proximity Between Queries and the Empty Answer Prob... |
ICTAI
2009
IEEE
13 years 12 months ago
2009
IEEE
1 Many applications require integrated access to multiple distributed, autonomous, and often semantically disparate data. Hence there is a need for bridging the semantic gap betwe...
ICCS
2009
Springer
13 years 12 months ago
2009
Springer
Abstract. In knowledge bases, the open world assumption and the ability to express variables may lead to an answer redundancy problem. This problem occurs when the returned answers...
SKG
2005
IEEE
13 years 11 months ago
2005
IEEE
Currently most centralized RDF storage and query architectures have problems in query performance and scalability. In this paper we present a distributed RDF query architecture to ...
ASWC
2009
Springer
13 years 12 months ago
2009
Springer
Abstract. We consider the problem of designing data wrapping ontologies whose purpose is to describe relational data sources and to provide a semantically enriched access to the un...
VLDB
2004
ACM
13 years 10 months ago
2004
ACM
Query containment is the most fundamental relationship between a pair of database queries: a query Q is said to be contained in a query Q if the answer for Q is always a subset of...