A representation of temporal aspects in Knowledge Based Systems modelling: A monitoring example

Abstract

A most common requirement in the development of Knowledge Based Systems in dynamic environments is the capability of expressing time. This paper presents how it is possible to express time related requirements on KBS tasks and to include time explicitly in rules. Such kind of facilities is attained using UML diagrams embedded in the usual CommonKADS notation preserving the methodology. A continuous monitoring task is used to illustrate thorough the paper. Some specific lacks, in CommonKADS, for the accurate analysis of these tasks in the time domain are identified, and the corresponding adaptations are presented. Finally, in order to express temporal elicited knowledge, a notation to include time in rules, focused on instants and intervals, is added.