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VLDB
1997
ACM

Describing and Using Query Capabilities of Heterogeneous Sources

13 years 7 months ago
Describing and Using Query Capabilities of Heterogeneous Sources
Information integration systems have to cope with the different and limited query interfaces of the underlying information sources. First, the integration systems need descriptions of the query capabilities of each source, i.e., the set of queries supported by each source. Second, the integration systems need algorithms for deciding how a query can be answered given the capabilities of the sources. Third, they need to translate a query into the format that the source understands. We present two languages suitable for descriptions of query capabilities of sources and compare their expressive power. We also describe algorithms for deciding whether a query “matches” the description and show their application to the problem of translating user queries into source-specific queries and commands. Finally, we propose new improved algorithms for the problem of answering queries using these descriptions.
Vasilis Vassalos, Yannis Papakonstantinou
Added 08 Aug 2010
Updated 08 Aug 2010
Type Conference
Year 1997
Where VLDB
Authors Vasilis Vassalos, Yannis Papakonstantinou
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