3836 search results - page 315 / 768 » Semantics of Database Transformations |
155
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ENTCS
2007
15 years 4 months ago
2007
We introduce the idea of optimisation validation, which is to formally establish that an instance of an optimising transformation indeed improves with respect to some resource mea...
154
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ICDE
1994
IEEE
15 years 9 months ago
1994
IEEE
The relational data model is based on sets of tuples, i.e. it does not allow duplicate tuples in a relation. Many database languages and systems do require multi-set place, the hi...
176
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EPIA
2003
Springer
15 years 10 months ago
2003
Springer
Modern information retrieval systems need the capability to reason about the knowledge conveyed by text bases. In this paper a methodology to automatically create ontologies and cl...
146
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SIGLEX
1991
15 years 8 months ago
1991
Drawing on a growing database of systematic relationships between word-senses, the authors argue that a significant class of these represent Lexical Implication Rules, a set of fo...
142
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IJAR
2008
15 years 4 months ago
2008
We introduce a general framework that is based on distance semantics and investigate the main properties of the entailment relations that it induces. It is shown that such entailm...