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    PODS
    2007
    ACM
    131views Database» more  PODS 2007»
    Provenance semirings
    14 years 4 months ago
    Provenance semirings
    Download  db.cis.upenn.edu
    We show that relational algebra calculations for incomplete databases, probabilistic databases, bag semantics and whyprovenance are particular cases of the same general algorithms...
    Todd J. Green, Gregory Karvounarakis, Val Tannen
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