2228 search results - page 325 / 446 » On Database Theory and XML |
208
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SSD
1997
Springer
15 years 10 months ago
1997
Springer
Theory, algorithms, techniques and tools for producing a generalisation of a map have long been available. In this paper we study the inverse problem, namely, given two maps L and...
201
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ICDT
2010
ACM
15 years 8 months ago
2010
ACM
When a query is evaluated under bag semantics, each answer is returned as many times as it has derivations. Bag semantics has long been recognized as important, especially when ag...
169
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PODS
2012
ACM
13 years 8 months ago
2012
ACM
In this paper we introduce a new and general privacy framework called Pufferfish. The Pufferfish framework can be used to create new privacy definitions that are customized t...
201
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ICDT
2012
ACM
13 years 8 months ago
2012
ACM
We introduce a representation system for relational data based on algebraic factorisation using distributivity of product over union and commutativity of product and union. We giv...
181
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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...