Classifying schematic and data heterogeneity in multidatabase systems
- 1 December 1991
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Computer
- Vol. 24 (12) , 12-18
- https://doi.org/10.1109/2.116884
Abstract
A complete framework for enumerating and classifying the types of multidatabase system (MDBS) structural and representational discrepancies is developed. The framework is structured according to a relational database schema and is both practical and complete. It was used to build the UniSQL/M commercial multidatabase system. This MDBS was built over Structured-Query-Language-based relational database systems and a unified relational and object-oriented database system named UniSQL/X. However, the results are substantially applicable to heterogeneous database systems that use a nonrelational data model (for example, an object-oriented data model) as the common data model and allow the formulation of queries directly against the component database schemas.Keywords
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