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<p>The authors present a common foundation for integrating pairs of entity sets, pairs of relationship sets, and an entity set with a relationship set. This common foundation is based on the basic principle of integrating attributes. Any pair of objects whose identifying attributes can be integrated can themselves be integrated. Several definitions of attribute equivalence are presented. These definitions can be used to specify the exact nature of the relationship between a pair of attributes. Based on these definitions, several strategies for attribute integration are presented and evaluated.</p>
attributed equivalence; schema integration; entity sets; relationship sets; attribute integration; database theory; equivalence classes.

"A Theory of Attributed Equivalence in Databases with Application to Schema Integration," in IEEE Transactions on Software Engineering, vol. 15, no. , pp. 449-463, 1989.
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