First-Order Under-Approximations of Consistent Query Answers

Int. J. Approx. Reasoning, Volume 83, 2017, Pages 337-355.

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Keywords:
Conjunctive queriesConsistent query answeringPrimary key

Abstract:

Consistent Query Answering (CQA) is a principled approach for answering queries on inconsistent databases. The consistent answer to a query q on an inconsistent database db is the intersection of the answers to q on all repairs, where a repair is any consistent database that is maximally close to db. Unfortunately, computing consistent an...More

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