PUG: a framework and practical implementation for why and why-not provenance

VLDB J., pp. 47-71, 2019.

Cited by: 7|Bibtex|Views2|Links
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Keywords:
Datalog Provenance Missing answers Semirings

Abstract:

Explaining why an answer is (or is not) returned by a query is important for many applications including auditing, debugging data and queries, and answering hypothetical questions about data. In this work, we present the first practical approach for answering such questions for queries with negation (first-order queries). Specifically, we...More

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