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Two Approaches to Event Definition Antony Galton and Juan Carlos Augusto

Summary: Two Approaches to Event Definition
Antony Galton½ and Juan Carlos Augusto¾
School of Engineering and Computer Science, University of Exeter, UK
Department of Electronics and Computer Science, University of Southampton, UK
Abstract. We compare two approaches to event definition, deriving from the
Active Database and Knowledge Representation communities. We relate these
approaches by taking a system of the former kind, displaying some of its short-
comings, and rectifying them by remodelling the system in the latter style. We
further show the extent to which the original system can be recreated within the
remodelled system. This bridge between the two approaches should provide a
starting point for fruitful interaction between the two communities.
1 Events in Knowledge Representation and Databases
Events are ubiquitous in both life and computing. In both areas we frequently classify
events, considering many individual events together as instances of some class, or event-
type, to which we give a name (for example "plane crashes" or "user interrupts"). Each
event-type gives rise to its own particular set of problems, but we may identify two as


Source: Augusto, Juan Carlos - School of Computing and Mathematics, University of Ulster at Jordanstown


Collections: Computer Technologies and Information Sciences