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UCQ-Rewritings for disjunctive knowledge and queries with negated atoms.
Enrique Matos Alfonso
Alexandros Chortaras
Giorgos Stamou
Published in:
Semantic Web (2021)
Keyphrases
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query rewriting
conjunctive queries
query containment
query evaluation
unions of conjunctive queries
view definitions
query language
query answering
query optimization
probabilistic databases
np complete
datalog programs
integrity constraints
answering queries using views
decision procedures
spatial databases
regular path queries
data complexity
xpath queries
knowledge representation
relational queries
tractable cases
answering queries
knowledge base
data model
transitive closure
tree patterns
special case
model counting
dnf formulas
query processing
query result
query execution
data exchange
data integration
logic programs
xml queries
database queries
data management
upper bound