429 search results - page 21 / 86 » A SAT approach to query optimization in mediator systems |
JELIA
2010
Springer
13 years 7 months ago
2010
Springer
Multi-Context Systems (MCS) are formalisms that enable the interlinkage of single knowledge bases, called contexts, via bridge rules. Recently, the evaluation of heterogeneous, no...
VLDB
2001
ACM
14 years 1 months ago
2001
ACM
In recent years, several methods have been proposed for implementing interactive similarity queries on multimedia databases. Common to all these methods is the idea to exploit use...
SIGMOD
2005
ACM
14 years 2 months ago
2005
ACM
One of the most powerful features of SQL is the use of nested queries. Most research work on the optimization of nested queries focuses on aggregate subqueries. However, the solut...
SIGMOD
2008
ACM
14 years 8 months ago
2008
ACM
Text documents often embed data that is structured in nature. This structured data is increasingly exposed using information extraction systems, which generate structured relation...
ENC
2005
IEEE
14 years 2 months ago
2005
IEEE
This paper describes SKIMA, a mediation system that gives transparent access to heterogeneous and distributed sources considering their semantics and the semantics of application ...