2228 search results - page 324 / 446 » On Database Theory and XML |
198
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DKE
2002
15 years 6 months ago
2002
We introduce the notion of iceberg concept lattices and show their use in knowledge discovery in databases. Iceberg lattices are a conceptual clustering method, which is well suit...
260
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GIS
2004
ACM
16 years 7 months ago
2004
ACM
In the geometric data model [6], spatio-temporal data are modelled as a finite collection of triangles that are transformed by time-dependent affinities. To facilitate querying an...
270
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PODS
2009
ACM
16 years 6 months ago
2009
ACM
We consider the problem of deciding query equivalence for a conjunctive language in which queries output complex objects composed from a mixture of nested, unordered collection ty...
190
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KDD
2007
ACM
16 years 6 months ago
2007
ACM
Characterising the differences between two databases is an often occurring problem in Data Mining. Detection of change over time is a prime example, comparing databases from two b...
178
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PODS
2010
ACM
15 years 11 months ago
2010
ACM
Both semantic and type-based query optimization rely on the idea that queries often exhibit non-trivial rewritings if the state space of the database is restricted. Despite their ...