Consistent query answering is a generally accepted approach for querying inconsistent knowledge bases. A consistent answer to a query is a tuple entailed by every repair, where a repair is a consistent database that "minimally"differs from the original (possibly inconsistent) one. This is a somewhat coarse-grained classification of tuples into consistent and non-consistent does not provide much information about the non-consistent tuples (e.g., a tuple entailed by 99 out of 100 repairs might be considered "almost consistent"). To overcome this limitation, we propose a probabilistic approach to querying inconsistent knowledge bases, which provides more informative query answers by associating a degree of consistency with each query answer by associating a probability to each repair, depending on the changes needed to obtain it.

Probabilistic Answers over Inconsistent Knowledge Bases

Fiorentino N.;Greco S.;Molinaro C.;Trubitsyna I.
2020

Abstract

Consistent query answering is a generally accepted approach for querying inconsistent knowledge bases. A consistent answer to a query is a tuple entailed by every repair, where a repair is a consistent database that "minimally"differs from the original (possibly inconsistent) one. This is a somewhat coarse-grained classification of tuples into consistent and non-consistent does not provide much information about the non-consistent tuples (e.g., a tuple entailed by 99 out of 100 repairs might be considered "almost consistent"). To overcome this limitation, we propose a probabilistic approach to querying inconsistent knowledge bases, which provides more informative query answers by associating a degree of consistency with each query answer by associating a probability to each repair, depending on the changes needed to obtain it.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/308996
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