6740 search results - page 1219 / 1348 » Querying Databases with Taxonomies |
158
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SSD
2005
Springer
15 years 12 months ago
2005
Springer
Networks often form the core of many users’ spatial databases. Networks are used to support the rapid navigation and analysis of linearly connected data such as that found in tra...
179
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SIGUCCS
2004
ACM
15 years 12 months ago
2004
ACM
Academic institutions’ dependence on web-based technologies to improve efficiency in class offerings, academic records, and office documentation is increasing at a rapid pace. T...
160
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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...
184
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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
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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...