Relative knowledge in a distributed database

Authors:
T. Imielinski
Affiliations:
Department of Computer Scince, Rutgers University
Venue:
PODS '87 Proceedings of the sixth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Year:
1987

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Abstract

Let DB be a database and let u1, , um be a collection of users each having at his or her disposal a query sublanguage Lu1 generated by some view predicate Each of these users knows only as much as he can learn from the database using his or her query sublanguage. Such a knowledge is called relative knowledge in the paper and its various properties including the model and proof theory are investigated. The applications of relative knowledge in the database security and integrity are also discussed.