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On the Expressive Power of Three-Valued and Four-Valued Languages.
Arnon Avron
Published in:
J. Log. Comput. (1999)
Keyphrases
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expressive power
first order logic
transitive closure
query language
data complexity
valued semantics
computational properties
inference rules
relational algebra
dl lite
relational calculus
artificial intelligence
machine learning
aggregate functions
database query languages
closure properties
database