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Information Systems2
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Lakshmanan, Laks V. S.1
Ram, Sudha1
Ramesh, Venkatar1
Sadri, Fereidoon1
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Uncertain Deductive Databases: A Hybrid Approach.
Peer reviewed Peer reviewed
Lakshmanan, Laks V. S.; Sadri, Fereidoon – Information Systems, 1997
Considers a "hybrid" approach to the modeling of uncertainty in deductive databases. The model, deductive IST (DIST) is based on an extension of the "Information Source Tracking" (IST) model for relational databases. Proves that the complexity of testing containment of conjunctive DIST queries remains the same as in the…
Descriptors: Databases, Deduction, Information Processing, Information Seeking
Integrity Constraint Integration in Heterogeneous Databases: An Enhanced Methodology for Schema Integration.
Peer reviewed Peer reviewed
Ramesh, Venkatar; Ram, Sudha – Information Systems, 1997
Presents a seven-step methodology for utilizing integrity constraint knowledge from heterogeneous databases. Describes generating a set of integrity constraints applicable at the integrated level from constraints specified on local databases. Introduces the concept of constraint-based relationships between objects in heterogeneous databases;…
Descriptors: Computer System Design, Databases, Information Processing, Information Technology