Abstract

INTRODUCTION In 1991, the ARPA Knowledge Sharing Eort (Neches et al., 91) revolutionized the way in which intelligent systems were built. They proposed the following: \Building Knowledge-based systems today usually entails constructing new knowledge bases from scratch. It could be done by assembling reusable components. Systems developers would then only need to worry about creating the specialized knowledge and reasoners new to the specic task of their system, using them to perform some of its reasoning. In this way, declarative knowledge, problem-solving techniques and reasoning services would all be shared among systems. This approach would facilitate building bigger and better systems cheaply..." Since them, considerable progress has been made in developing the conceptual bases for building technology that allows knowledge-component reuse and sharing. To enable sharing and reuse of knowledge and reasoning behavior across domains and tasks, Ontologies and Problem Solving

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