2985 search results - page 157 / 597 » Indexing Distributed Complex Data for Complex Queries |
156
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CBMS
2006
IEEE
15 years 11 months ago
2006
IEEE
— Most biomedical research databases contain considerable amounts of time-oriented data. However, temporal knowledge about the contextual meaning of such data is not usually repr...
229
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VLDB
2007
ACM
16 years 5 months ago
2007
ACM
Research in modeling and querying spatial data has primarily focused on traditional "crisp" spatial objects with exact location and spatial extent. More recent work, how...
151
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ER
2007
Springer
15 years 9 months ago
2007
Springer
The paper presents an unified Description Logic (DL) model for databases. Describing database models using DLs is a fundamental problem in many areas because it turns databases to...
164
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KR
2010
Springer
15 years 9 months ago
2010
Springer
Ontologies can be used to provide an enriched vocabulary for the formulation of queries over instance data. We identify query emptiness and predicate emptiness as two central reas...
136
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AMW
2010
15 years 6 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...