7576 search results - page 306 / 1516 » On Querying Ontologies and Databases |
169
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VLDB
2004
ACM
16 years 3 days ago
2004
ACM
PIVOT and UNPIVOT, two operators on tabular data that exchange rows and columns, enable data transformations useful in data modeling, data analysis, and data presentation. They ca...
312
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ICDE
2009
IEEE
16 years 8 months ago
2009
IEEE
Abstract-- In sensor environments and moving robot applications, the position of an object is often known imprecisely because of measurement error and/or movement of the object. In...
197
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SIGMOD
2010
ACM
15 years 11 months ago
2010
ACM
Many web queries seek information about named entities (such as products or people). Web search engines federate such entity-oriented queries to relevant structured databases; the...
173
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PODS
2003
ACM
16 years 6 months ago
2003
ACM
In this paper we consider general path constraints for semistructured databases. Our general constraints do not suffer from the limitations of the path constraints previously stud...
213
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FOIKS
2004
Springer
16 years 4 days ago
2004
Springer
Abstract. We give a general framework for approximate query processing in semistructured databases. We focus on regular path queries, which are the integral part of most of the que...