Hideaki Takeda's Publication
- H. Takeda, K. Iino and T. Nishida: Agent Organization
and Communication with Multiple Ontologies, International Journal of
Cooperative Information Systems, Vol. 4, No. 4, pp. 321–337 (1995).
In this paper, we discuss how ontology plays roles in building a
destributed and heterogeneous knowledge-base system. First we discuss
relationship between ontology and agents in the Knowledgeable Community which
is a framework of knowledge sharing and reuse based on a multi-agent
architecture. Ontology is a minimum requirement for each agent to join the
Knowledgeable Community. Second we explain mediation by ontology to show how
ontology is used in the Knowledgeable Community. A special agent called
mediator analyzes undirected messages and infer candidates of recipient
agents by consulting ontology and relationship between ontology and agents.
Third we model ontology as combination of aspects each of which can represent
a way of conceptualization. Aspects are combined either as combination aspect
which means integration of aspects or category aspect which means choice of
aspects. Since ontology by aspect allows heterogeneous and multiple
descriptions for phenomenon in the world, it is appropriate for heterogeneous
knowledge-base systems. We also show translation of messages as a way of
interpreting multiple aspects. A translation agent can translate a message
with some aspect to one with another aspect by analyzing dependency of
aspects. Mediation and translation of messages are important to build agents
easily and naturally because less knowledge on other agents is requested for
each agent.
Hideaki Takeda (National Institute of Informatics)