A paraconsistent logic programming approach for querying inconsistent databases

When integrating data coming from multiple different sources we are faced with the possibility of inconsistency in databases. A paraconsistent approach for knowledge base integration allows keeping inconsistent information and reasoning in its presence. In this paper, we use a paraconsistent logic (LFI1) as the underlying logic for the specification of P-Datalog, a deductive query language for databases containing inconsistent information. We present a declarative semantics which captures the desired meaning of a recursive query executed over a database containing inconsistent facts and whose rules allow inferring information from inconsistent premises. We also present a bottom-up evaluation method for P-Datalog programs based on an alternating fixpoint operator. Key words: Inconsistent Information, Logic Programming, Paraconsistent Logic, Deductive Databases, Query Languages.

• Type: Journal
• Year: 2007
• Where: IJAR
• Authors: Sandra de Amo, Mônica Sakuray Pais
• Keywords: IJAR 2007, Inconsistent Information, Paraconsistent Logic, Query Languages