254 search results - page 7 / 51 » On the Limitations of Provenance for Queries With Difference |
JBCS
2010
13 years 2 months ago
2010
Schema matching is a fundamental issue to many database applications, such as query mediation and data warehousing. It becomes a challenge when different vocabularies are used to r...
IPPS
2008
IEEE
14 years 2 months ago
2008
IEEE
Peer-to-Peer (P2P) networks have proven to be an efficient and successful mechanism for file sharing over the Internet. However, current P2P protocols have long worst case query...
SC
2009
ACM
14 years 2 months ago
2009
ACM
One of the main advantages of using a scientific workflow management system (SWfMS) to orchestrate data flows among scientific activities is to control and register the whole work...
ICDE
2001
IEEE
14 years 9 months ago
2001
IEEE
We describe efficient algorithms for accurately estimating the number of matches of a small node-labeled tree, i.e., a twig, in a large node-labeled tree, using a summary data str...
ICDE
2005
IEEE
14 years 9 months ago
2005
IEEE
The ability to compute top-k matches to XML queries is gaining importance due to the increasing number of large XML repositories. The efficiency of top-k query evaluation relies o...