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Reverse data exchange: Coping with nulls.
Ronald Fagin
Phokion G. Kolaitis
Lucian Popa
Wang Chiew Tan
Published in:
ACM Trans. Database Syst. (2011)
Keyphrases
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data exchange
query answering
schema mappings
data integration
data management
xml queries
data sets
decision making
similarity measure
data complexity