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Tractable Query Answering in Indefinite Constraint Databases: Basic Results and Applications to Querying Spatiotemporal Information.
Manolis Koubarakis
Spiros Skiadopoulos
Published in:
Spatio-Temporal Database Management (1999)
Keyphrases
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query answering
constraint databases
data exchange
databases
query language
answering queries
computational complexity
transitive closure
data integration
first order logic
integrity constraints
spatial information
database schema
data complexity
semantic web
end users
data model