Publication Type

Conference Proceeding Article

Version

publishedVersion

Publication Date

1-1994

Abstract

Resolving domain incompatibility among independently developed databases often involves uncertain information. DeMichiel (1989) showed that uncertain information can be generated by the mapping of conflicting attributes to a common domain, based on some domain knowledge. The authors show that uncertain information can also arise when the database integration process requires information not directly represented in the component databases, but can be obtained through some summary of data. They therefore propose an extended relational model based on Dempster-Shafer theory of evidence (1976) to incorporate such uncertain knowledge about the source databases. They also develop a full set of extended relational operations over the extended relations. In particular, an extended union operation has been formalized to combine two extended relations using Dempster's rule of combination. The closure and boundedness properties of the proposed extended operations are formulated.

Discipline

Databases and Information Systems

Publication

10th International Conference on Data Engineering: Proceedings: February 14-18, 1994, Houson, Texas

First Page

154

Last Page

163

ISBN

9780818654008

Identifier

10.1109/ICDE.1994.283022

Publisher

IEEE Computer Society

City or Country

Los Alamitos, CA

Additional URL

http://doi.org/10.1109/ICDE.1994.283022

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