5954 search results - page 188 / 1191 » Querying Bi-level Information |
158
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AMW
2010
15 years 7 months ago
2010
We address the problem of answering conjunctive queries over knowledge bases, specified by sets of first-order sentences called tuple-generating dependencies (TGDs). This problem i...
227
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SIGMOD
2007
ACM
16 years 6 months ago
2007
ACM
In contrast to classical databases and IR systems, real-world information systems have to deal increasingly with very vague and diverse structures for information management and s...
259
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ICDE
2007
IEEE
16 years 7 months ago
2007
IEEE
Text documents often embed data that is structured in nature. By processing a text database with information extraction systems, we can define a variety of structured "relati...
180
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EDBT
2008
ACM
15 years 8 months ago
2008
ACM
In P2P systems where query initiators and information providers do not necessarily share the same ontology, semantic interoperability generally relies on ontology matching or sche...
127
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SIGIR
2004
ACM
15 years 11 months ago
2004
ACM
The Implicit Query (IQ) prototype is a system which automatically generates context-sensitive searches based on a user’s current computing activities. In the demo, we show IQ ru...