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Creators/Authors contains: "Sakama, Chiaki"

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  1. ; ( , Lecture notes in computer science)
    Logic programs (LPs) and argumentation frameworks (AFs) are two declarative knowledge representation (KR) formalisms used for different reasoning tasks. The purpose of this study is interlinking two different reasoning components. To this end, we introduce two frameworks: LPAF and AFLP. The former enables to use the result of argumentation in AF for reasoning in LP, while the latter enables to use the result of reasoning in LP for arguing in AF. These frameworks are extended to bidirectional frameworks in which AF and LP can exchange information with each other. We also investigate their connection to several general KR frameworks from the literature. 
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    Accepted Manuscript Full Text Available
  2. ; ( , Journal of artificial intelligence research)
    null (Ed.)
    The paper introduces the notion of an epistemic argumentation framework (EAF) as a means to integrate the beliefs of a reasoner with argumentation. Intuitively, an EAF encodes the beliefs of an agent who reasons about arguments. Formally, an EAF is a pair of an argumentation framework and an epistemic constraint. The semantics of the EAF is defined by the notion of an ω-epistemic labelling set, where ω is complete, stable, grounded, or preferred, which is a set of ω-labellings that collectively satisfies the epistemic constraint of the EAF. The paper shows how EAF can represent different views of reasoners on the same argumentation framework. It also includes representing preferences in EAF and multi-agent argumentation. Finally, the paper discusses complexity issues and computation using epistemic logic programming. 
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