Conceptual modelling for knowledge-based DSS development

The role of conceptual modelling in the development of knowledge-based DSSs is discussed. Arguments are given in favor of identifying conceptual modelling approaches with knowledge representation schemes. A brief overview is made of the three current paradigms in conceptual modelling and knowledge representation. The need for an integration of the logical and structure-oriented paradigms is pointed out. The use of the clausal institution for structuring and using knowledge is advocated on the basis that it leads to the envisaged integration. The knowledge base is identified with a theory in this institution. Knowledge representation approaches are defined as collections of parameterized theories (abstractions) which can be used for building knowledge bases, as well as new abstractions. The resulting knowledge base is shown to have an explicit structure established according to the adopted knowledge representation approach and to be accessible through clausal logic general purpose inference machanisms. Implementation issues in a PROLOG environment are also discussed.