This paper reports on an investigation into a formal language for specifying KADS models of expertise. After arguing the need for and the use of such formal representations, we discuss each of the layers of a KADS model of expertise in the subsequent sections, and define the formal constructions that we use to represent the KADS entities at every layer: order-sorted logic at the domain layer, meta-logic at the inference layer, and dynamic-logic at the task layer. All these constructions together make up (ML)^2, the language that we use to represent models of expertise. We illustrate the use of (ML)2 in a small example model. We conclude by describing our experience to date with constructing such formal models in (ML)2 , and by discussing some open problems that remain for future work.
|Title of host publication
|KADS: A Principled Approach to Knowledge-Based System Development
|Published - 1992