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2008

On the provenance of non-answers to queries over extracted data

9 years 1 months ago
On the provenance of non-answers to queries over extracted data
In information extraction, uncertainty is ubiquitous. For this reason, it is useful to provide users querying extracted data with explanations for the answers they receive. Providing the provenance for tuples in a query result partially addresses this problem, in that provenance can explain why a tuple is in the result of a query. However, in some cases explaining why a tuple is not in the result may be just as helpful. In this work we focus on providing provenance-style explanations for non-answers and develop a mechanism for providing this new type of provenance. Our experience with an information extraction prototype suggests that our approach can provide effective provenance information that can help a user resolve their doubts over non-answers to a query.
Jiansheng Huang, Ting Chen, AnHai Doan, Jeffrey F.
Added 28 Dec 2010
Updated 28 Dec 2010
Type Journal
Year 2008
Where PVLDB
Authors Jiansheng Huang, Ting Chen, AnHai Doan, Jeffrey F. Naughton
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