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Source-Aware Repairs for Inconsistent Databases
The problem of extracting consistent query answers from an inconsistent database has been mainly approached from two directions: ldquorepairingrdquo the database or rewriting queries so that only consistent answers are returned. Logic programming with explicit negation has been widely used in order...
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Main Authors: | , |
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Format: | Conference Proceeding |
Language: | English |
Subjects: | |
Online Access: | Request full text |
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Summary: | The problem of extracting consistent query answers from an inconsistent database has been mainly approached from two directions: ldquorepairingrdquo the database or rewriting queries so that only consistent answers are returned. Logic programming with explicit negation has been widely used in order to specify repairs such that each answer set of the repair program corresponds to a repair. In this paper, we explore the problem of obtaining so called ldquopreferred repairsrdquo from a database that is both inconsistent and incomplete based on preferences for the source from which the information is obtained. We show how a preferred repair might be specified using logic programs when source information is available. |
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DOI: | 10.1109/DBKDA.2009.15 |