Pegasus: a system for seamless integration of heterogeneous information sources

Ahmed, Rafi; DeSmedt, P.; Kent, William; Ketabchi, Mohammad A.; Litwin, Witold; Rafii, Abbas; Shan, Ming-Chien

doi:10.1109/cmpcon.1991.128796

Cited by 5 publications

(1 citation statement)

References 12 publications

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“…Integration of heterogeneous databases has been proposed in [2,4,6,9]. These approaches use federated database systems [1,9] or multidatabase systems [5,6] to support interoperability of heterogeneous databases.…”

Section: Introductionmentioning

confidence: 99%

A query mediation approach to interoperability of heterogeneous databases

Huang

Kerridge

Chen³

Proceedings 11th Australasian Database Conference. ADC 2000 (Cat. No.PR00528)

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The need to transform queries between heterogeneous databases arises from many circumstances, including query transformation between a global and a local query. This paper describes a query mediation approach to the interoperability of heterogeneous databases. We develop a query mediation architecture that facilitates automated query transformation, which is applicable in many circumstances, such as query transformation in a federated database environment. Different application languages are transformed into intermediate representations that can be processed by the query mediator. The main characteristic of our system is that the query transformation agent, which acks as a mediator, is used to support automated query transformation that protects users from the troublesome task of semantic and representational discrepancies. Two query languages, ODMG-OQL and SQL have been used to investigate the query mediation architecture.

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Section: Introductionmentioning

confidence: 99%

A query mediation approach to interoperability of heterogeneous databases

Huang

Kerridge

Chen³

Proceedings 11th Australasian Database Conference. ADC 2000 (Cat. No.PR00528)

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Modelling the real world by Multi-World data model

Duong

Hiller

[1993] Proceedings International Conference on Intelligent and Cooperative Information Systems

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A b s t r a c t This paper discusses various philosophical issues that relate to database modelling. In particular, we argue that existing paradigms fail in a multi-database environment, and hence it needs to be supplanted by one that is more flexible and dynamic. Based on this new paradigm we propose a MultiWorld data model which consists of clusters of privatdpublic databases integrated via a contracting mechanism. Each database is autonomous but is able to retrieve external as well as local data. Autonomy may appears to lead to conflict. We discuss its nature and propose a resolution strategy based on combinatory theories of truth.

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A framework of flexible and dynamic integration for multidatabases

Duong

Hiller

Ngu

[1993] Proceedings International Conference on Intelligent and Cooperative Information Systems

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Pegasus: a system for seamless integration of heterogeneous information sources

Cited by 5 publications

References 12 publications

A query mediation approach to interoperability of heterogeneous databases

A query mediation approach to interoperability of heterogeneous databases

Modelling the real world by Multi-World data model

A framework of flexible and dynamic integration for multidatabases

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