617 search results - page 89 / 124 » Semantic queries in databases: problems and challenges |
SIGMOD
2004
ACM
16 years 19 days ago
2004
ACM
A schema mapping produces a semantic correspondence between two schemas. Automating schema mapping is challenging. The existence of 1:n (or n:1) and n:m mapping cardinalities make...
BTW
2009
Springer
15 years 3 months ago
2009
Springer
: Simplifying data programming is a core mission of data management research. The issue at stake is to help engineers build efficient and robust data-centric applications. The fron...
136
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SIGIR
2008
ACM
15 years 12 days ago
2008
ACM
We study in this paper the problem of bridging the semantic gap between low-level image features and high-level semantic concepts, which is the key hindrance in content-based imag...
103
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EDBT
2010
ACM
15 years 7 months ago
2010
ACM
This paper addresses a fundamental and challenging problem with broad applications: efficient processing of region-based promotion queries, i.e., to discover the top-k most inter...
ICDE
2009
IEEE
15 years 7 months ago
2009
IEEE
Abstract— Customized semantic query answering, personalized search, focused crawlers and localized search engines frequently focus on ranking the pages contained within a subgrap...