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2012 Volume 27
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RESEARCH ARTICLE   Open Access    

Modeling knowledge dynamics in multi-agent systems based on informants

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RESEARCH ARTICLE   Open Access    

Modeling knowledge dynamics in multi-agent systems based on informants

The Knowledge Engineering Review  27 Article number: 10.1017/S0269888912000021  (2012)  |  Cite this article

Abstract: Abstract: In this paper, we model knowledge dynamics in agents’ belief bases in a collaborative multi-agent system (MAS). Four change operators are introduced: expansion, contraction, prioritized revision, and non-prioritized revision. For all of them, both constructive definitions and an axiomatic characterization by representation theorems are given. We formally justify minimal change, consistency maintenance, and non-prioritization principles. These operators are based on an epistemic model for multi-source belief revision in which a rational way to weigh the beliefs using a credibility order among agents is developed. The defined operators can be seen as skills added to the agents improving the collective reasoning of a MAS.

    • We would like to thank the anonymous referee for their valuable comments on an earlier version of this paper. We are also grateful to Martín Moguillansky for his useful comments on previous drafts of this work. This work was partially supported by UNS (PGI 24/ZN18) and CONICET (PIP 112-200801-02798).

    • A policy can be seen as a design decision.

    • We assume that, given a relation )(--><$>{{\preceq}_{{{K}_{{{A}_i}}}}}<$><!-- on )(--><$>{\cal L}\times{\cal L}<$><!--, it is possible to define a relation )(--><$>{{\preceq}_X}<$><!-- on every )(--><$>X\, \subseteq \,{{K}_{{{A}_i}}}.<$><!--

    • Copyright © Cambridge University Press 20122012Cambridge University Press
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    Luciano H. Tamargo, Alejandro J. García, Marcelo A. Falappa, Guillermo R. Simari. 2012. Modeling knowledge dynamics in multi-agent systems based on informants. The Knowledge Engineering Review. 27:21 doi: 10.1017/S0269888912000021
    Luciano H. Tamargo, Alejandro J. García, Marcelo A. Falappa, Guillermo R. Simari. 2012. Modeling knowledge dynamics in multi-agent systems based on informants. The Knowledge Engineering Review. 27:21 doi: 10.1017/S0269888912000021
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