2228 search results - page 259 / 446 » On Database Theory and XML |
205
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CL
2000
Springer
15 years 11 months ago
2000
Springer
Abstract. We consider the problem of specifying and computing consistent answers to queries against databases that do not satisfy given integrity constraints. This is done by simul...
173
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VLDB
1989
ACM
15 years 11 months ago
1989
ACM
Fuzzy set theory represents a uniform framework for extending the relational database model to han-, dle imprecision of information found in the real world. None of the existing p...
180
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TABLEAUX
2000
Springer
15 years 10 months ago
2000
Springer
Two things are done in this paper. First, a modal logic in which one can quantify over both objects and concepts is presented; a semantics and a tableau system are given. It is a n...
195
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JSW
2007
15 years 7 months ago
2007
— Active databases have been used in many different fields to accomplish many different tasks. One of the main problems today that still have not been solved is authorization. In...
203
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DOLAP
2005
ACM
15 years 9 months ago
2005
ACM
We propose a new functional framework for modeling, querying and reasoning about OLAP databases. The framework represents data (data cubes and dimensional hierarchies) and queryin...