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PODS
2010
ACM
242views Database» more  PODS 2010»
10 years 8 months ago
Certain answers for XML queries
The notion of certain answers arises when one queries incompletely speciļ¬ed databases, e.g., in data integration and exchange scenarios, or databases with missing information. W...
Claire David, Leonid Libkin, Filip Murlak
LPNMR
2009
Springer
10 years 9 months ago
Complexity of the Stable Model Semantics for Queries on Incomplete Databases
Abstract. We study the complexity of consistency checking and query answering on incomplete databases for languages ranging from non-recursive Datalog to disjunctive Datalog with n...
Jos de Bruijn, Stijn Heymans
books