“…However, relating both models presents a first difficulty which lies in the different natures of the representation formalisms used in KE and KDD. Diverse KE methodologies and tools such as Roles-Limiting Methods and Generic Tasks [23], and later, CommonKADS [1,2], Protégé [3], MIKE [4,5], KAMET II [6,7], VITAL [8], etc. take as input experts' knowledge and produce as result a model of this knowledge being represented by frames, diagrams, related concepts, logic sentences, etc.…”