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The Computer Journal 2001 44(1):1-20; doi:10.1093/comjnl/44.1.1
© 2001 by British Computer Society
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A Conceptual Framework for Agent Definition and Development

Michael Luck1 and Mark d'Inverno2

1 Department of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, UK Email: mml@ecs.soton.ac.uk 2 Cavendish School of Computer Science, University of Westminster, New Cavendish Street, London W1W 6UW, UK

The use of agents of many different kinds in a variety of fields of computer science and artificial intelligence is increasing rapidly and is due, in part, to their wide applicability. The richness of the agent metaphor that leads to many different uses of the term is, however, both a strength and a weakness: its strength lies in the fact that it can be applied in very many different ways in many situations for different purposes; the weakness is that the term agent is now used so frequently that there is no commonly accepted notion of what it is that constitutes an agent. This paper addresses this issue by applying formal methods to provide a defining framework for agent systems. The Z specification language is used to provide an accessible and unified formal account of agent systems, allowing us to escape from the terminological chaos that surrounds agents. In particular, the framework precisely and unambiguously provides meanings for common concepts and terms, enables alternative models of particular classes of system to be described within it, and provides a foundation for subsequent development of increasingly more refined concepts.

Received 3 November, 1999. Revised 28 November, 2000.


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