R. Bagai (USA)
Fuzzy Systems, Relational Databases, Incompleteness and Inconsistency, Query Languages.
We present a series of three query languages for databases containing paraconsistent information, i.e. information that is incomplete or even inconsistent. Our languages are 4 valued extensions, respectively, of the SELECT statement of SQL, the tuple relational calculus, and the domain re lational calculus used for relational databases. Our gener alized 4-valued semantics permits representation and ma nipulation of paraconsistent information for numerous in terdisciplinary applications rich in such information, for which existing methods are inadequate.
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