429 search results - page 39 / 86 » A SAT approach to query optimization in mediator systems |
VLDB
2005
ACM
14 years 2 months ago
2005
ACM
To answer user queries, a data integration system employs a set of semantic mappings between the mediated schema and the schemas of data sources. In dynamic environments sources o...
WWW
2007
ACM
14 years 9 months ago
2007
ACM
Search queries applied to extract relevant information from the World Wide Web over a period of time may be denoted as continuous search queries. The improvement of continuous sea...
ICLP
2007
Springer
14 years 16 days ago
2007
Springer
Abstract. In this paper we describe the OnEQL system, a query engine that implements optimization techniques and evaluation strategies to speed up the evaluation time of querying a...
JCP
2008
13 years 8 months ago
2008
In sensor networks, continuous query is commonly used for collecting periodical data from the objects under monitoring. This sort of queries needs to be carefully designed, in orde...
ESWS
2011
Springer
13 years 4 days ago
2011
Springer
Driven by the success of the Linked Open Data initiative today’s Semantic Web is best characterized as a Web of interlinked datasets. Hand in hand with this structure new challen...