3244 search results - page 525 / 649 » Extensions to Description Logics |
280
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ICDT
2009
ACM
16 years 7 months ago
2009
ACM
Marx and de Rijke have shown that the navigational core of the w3c XML query language XPath is not first-order complete ? that is it cannot express every query definable in firsto...
272
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ICDT
2009
ACM
16 years 7 months ago
2009
ACM
Schema mappings are declarative specifications that describe the relationship between two database schemas. In recent years, there has been an extensive study of schema mappings a...
256
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PODS
2009
ACM
16 years 7 months ago
2009
ACM
The paper investigates the question of whether a partially closed database has complete information to answer a query. In practice an enterprise often maintains master data Dm, a ...
164
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POPL
1995
ACM
15 years 10 months ago
1995
ACM
d Abstract) We extend the model of [VRV94] to express strong time-outs (and pre-emption): if an event A does not happen through time t, cause event B to happen at time t. Such con...
184
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FLAIRS
2008
15 years 8 months ago
2008
One of the major weaknesses of current research on the Semantic Web (SW) is the lack of proper means to represent and reason with uncertainty. A number of recent efforts from the ...