Conjunctive queries for ontology based agent communication in MAS

Authors:
Cassia Trojahn;Paulo Quaresma;Renata Vieira
Affiliations:
Universidade de Evora, Rua Romao Ramalho, Evora, Portugal;Universidade de Evora, Rua Romao Ramalho, Evora, Portugal;Pontificia Universidade, Catolica do Rio Grande do Sul, Porto Alegre, Brazil
Venue:
Proceedings of the 7th international joint conference on Autonomous agents and multiagent systems - Volume 2
Year:
2008

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Abstract

In order to obtain semantic interoperability in open Multi-Agent Systems, agents need to agree on the basis of different ontologies. In this paper we formally define mapping as correspondences between queries over ontologies. Individual mappings are computed by specialized agents using different mapping approaches. Next, these agents use argumentation to exchange their local results, in order to agree on the mappings. Based on their preferences and strength of the arguments, the agents compute their preferred mapping sets. The arguments in such preferred sets are viewed as the set of globally acceptable arguments. These arguments are then represented as conjunctive queries in OWL-DL extended with DL-safe rules [9], a restriction imposed to attain decidability in such query answering system.