Knowledge representation is aimed to knowledge research, aimed toa “business oriented” problem solving. The knowledge representation passes through shapes of human reading, machine reading, descriptive attributions, filtering, general and specific ontologies. What are ontologies helpful to? They serve in two ways: they represent the basis of communication between people and groups of a specific cultural, linguistic, management area in which conceptual and similar elements are shared. Another application of ontologies in KM is due to the need to describe physical entities (objects, events, region) or meta-cathegories (ideas, properties, qualities) used for problem solving; the use of ontologies is the turning point in knowledge basis value.