Metadata based mediator generation

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Mediators are a critical component of any data warehouse, particularly one utilizing partially materialized views; they transform data from its source format to the warehouse representation while resolving semantic and syntactic conflicts. The close relationship between mediators and databases, requires a mediator to be updated whenever an associated schema is modified. This maintenance may be a significant undertaking if a warehouse integrates several dynamic data sources. However, failure to quickly perform these updates significantly reduces the reliability of the warehouse because queries do not have access to the m current data. This may result in incorrect or misleading responses, and ... continued below

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Critchlow, T March 1, 1998.

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Description

Mediators are a critical component of any data warehouse, particularly one utilizing partially materialized views; they transform data from its source format to the warehouse representation while resolving semantic and syntactic conflicts. The close relationship between mediators and databases, requires a mediator to be updated whenever an associated schema is modified. This maintenance may be a significant undertaking if a warehouse integrates several dynamic data sources. However, failure to quickly perform these updates significantly reduces the reliability of the warehouse because queries do not have access to the m current data. This may result in incorrect or misleading responses, and reduce user confidence in the warehouse. This paper describes a metadata framework, and associated software designed to automate a significant portion of the mediator generation task and thereby reduce the effort involved in adapting the schema changes. By allowing the DBA to concentrate on identifying the modifications at a high level, instead of reprogramming the mediator, turnaround time is reduced and warehouse reliability is improved.

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832 Kilobytes

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  • 3rd International Foundation on Cooperative Information Systems (CoopIS '98), New York, NY, August 20-22, 1998

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  • Other: DE00002393
  • Report No.: UCRL-JC-130234
  • Grant Number: W-7405-Eng-48
  • Office of Scientific & Technical Information Report Number: 2393
  • Archival Resource Key: ark:/67531/metadc671717

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  • March 1, 1998

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  • June 29, 2015, 9:42 p.m.

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  • May 6, 2016, 11:29 p.m.

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Critchlow, T. Metadata based mediator generation, article, March 1, 1998; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc671717/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.