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Permanent link (DOI): https://doi.org/10.7939/R3KD1QQ17

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An Adaptive Approach to Query Mediation across Hetergeneous Information Sources Open Access

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Author or creator
Liu, Ling
Pu, Calton
Lee, Yooshin
Additional contributors
Subject/Keyword
query mediation
customizable information gathering
Type of item
Report
Language
English
Place
Time
Description
Technical report TR96-10. We propose a query mediation framework to support customizable information gathering across heterogeneous and autonomous information sources. Instead of an integrated (and static) global schema, we propose an adaptive approach to interoperability which allows information consumers to represent their queries based on the customized personal view rather than a system-defined integrated view. The emphasis is more on coordination among information producers and information consumers rather than on pre-defined information integration. We describe how the information consumers are connected with information producers and how the information consumers' query requests are dynamically processed. The query mediation framework consists of five steps: query routing, query decomposition, parallel access plan generation, subquery translation and execution, and query result assembly. Concrete examples illustrate the challenges arising from heterogeneity in these five steps and how the framework scales up as the number of information sources grow and evolve.
Date created
1996
DOI
doi:10.7939/R3KD1QQ17
License information
Creative Commons Attribution 3.0 Unported
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