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DOOD
1995
Springer

A Query Translation Scheme for Rapid Implementation of Wrappers

14 years 4 months ago
A Query Translation Scheme for Rapid Implementation of Wrappers
Wrappers provide access to heterogeneous information sources by converting application queries into source speci c queries or commands. In this paper we present a wrapper implementation toolkit that facilitates rapid development of wrappers. We focus on the query translation component of the toolkit, called the converter. The converter takes as input a Query Description and Translation Language QDTL description of the queries that can be processed by the underlying source. Based on this description the converter decides if an application query is a directly supported, i.e., it can be translated to a query of the underlying system following instructions in the QDTL description; b logically supported, i.e., logically equivalent to a directly supported query; c indirectly supported, i.e., it can be computed by applying a lter, automatically generated by the converter, to the result of a directly supported query.
Yannis Papakonstantinou, Ashish Gupta, Hector Garc
Added 26 Aug 2010
Updated 26 Aug 2010
Type Conference
Year 1995
Where DOOD
Authors Yannis Papakonstantinou, Ashish Gupta, Hector Garcia-Molina, Jeffrey D. Ullman
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