318 search results - page 30 / 64 » Optimization of Query Streams Using Semantic Prefetching |
ERSHOV
2006
Springer
14 years 19 days ago
2006
Springer
In this work, we present a semantic query optimization technique to improve the efficiency of the evaluation of a subset of SQL:1999 recursive queries. Using datalog notation, we c...
ICTAI
2008
IEEE
14 years 3 months ago
2008
IEEE
Unlike simple questions, complex questions cannot be answered by simply extracting named entities. These questions require inferencing and synthesizing information from multiple d...
ER
2004
Springer
14 years 2 months ago
2004
Springer
The envisioned Semantic Web aims to provide richly annotated and explicitly structured Web pages in XML, RDF, or description logics, based upon underlying ontologies and thesauri. ...
HPCA
2003
IEEE
14 years 9 months ago
2003
IEEE
Scalability of applications on distributed sharedmemory (DSM) multiprocessors is limited by communication overheads. At some point, using more processors to increase parallelism y...
ICDT
2005
ACM
14 years 2 months ago
2005
ACM
We study the problem of rewriting queries using views in the presence of access patterns, integrity constraints, disjunction, and negation. We provide asymptotically optimal algori...