Data Management

Clean Answers Over Dirty Databases: A Probabilistic Approach

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Executive Summary

The detection of duplicate tuples, corresponding to the same real-world entity, is an important task in data integration and cleaning. While many techniques exist to identify such tuples, the merging or elimination of duplicates can be a difficult task that relies on ad-hoc and often manual solutions. The authors propose a complementary approach that permits declarative query answering over duplicated data, where each duplicate is associated with a probability of being in the clean database.

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