7576 search results - page 1390 / 1516 » On Querying Ontologies and Databases |
159
click to vote
CIKM
2004
Springer
15 years 12 months ago
2004
Springer
We study the representation, derivation and utilization of a special kind of constraints in multidatabase systems. A major challenge is when component database schemas are schemat...
183
click to vote
VLDB
2004
ACM
15 years 11 months ago
2004
ACM
At a fundamental level, the key challenge in data integration is to reconcile the semantics of disparate data sets, each expressed with a different database structure. I argue th...
161
click to vote
PODS
2010
ACM
15 years 11 months ago
2010
ACM
We give the first optimal algorithm for estimating the number of distinct elements in a data stream, closing a long line of theoretical research on this problem begun by Flajolet...
177
click to vote
VLDB
1999
ACM
15 years 10 months ago
1999
ACM
Electronic commerce is emerging as a major Websupported application. In this paper we argue that database technology can, and should, provide the backbone for a wide range of such...
184
click to vote
VLDB
1999
ACM
15 years 10 months ago
1999
ACM
As random access memory gets cheaper, it becomes increasingly affordable to build computers with large main memories. We consider decision support workloads within the context of...