Qualitative Modelling of Information Systems

Conclusions A concept of information has been introduced based on the well known subject-predicate form which fits into linguistic modelling of information systems. Since the behaviour of living, especially human, beings is by and large unpredictable, repeatability cannot be taken for granted in constructing a formal model. Thus, the model presented here can only say that if objects possess the given features and behave in the manner specified then the computed outcomes will occur. It is stipulated that the structure of a situation given in terms of objects and interactions remains invariant over a time span but their modifiers expressed as personality profiles, are allowed to fluctuate due to moods, human frailty, competence etc. The effect of fluctuations on the occurrence of outcomes possibly over time can be assessed. It has been demonstrated that the number of states in which a situation can find itself due to fluctuation of modifiers, rapidly expands leading to some form of a chaotic operation. The expansion can be checked by introducing limiting criteria through certainty factors carried by calculating properties (cp) and explicit purposive systems. The example considered shows information as understood here and as carried by medium. The latter can be eliminated by rewording the sentences : ‘Customer communicates with the clerk that he requires certain items’, for example.