关键词: 模糊本体, 模糊概念, 模糊概念关系, 模糊, 认知

Abstract: Ontology is the result of human cognizing objective things and their relations between each other, expressed in the form of concepts and concept relations each of which is denoted by a vocabulary. A person can just master limited vocabularies, so human cognition has inevitably two characteristics：a vocabulary refers to several concepts, namely reducing the amount of concept in the form of a concept with a varying extension replacing several ones with a fixed extension；a vocabulary refers to several concept relations, namely merging the types of concept relations in the form of a concept relation thought as a member of other concept relation in some degree of membership. The former derives the fuzzy concept, and the latter introduces the fuzzy concept relation, the two fuzzy elements can compose a fuzzy ontology which is the world in human brain obtained from cognizing the objective world according to the rule of human cognition. The word fuzzy as a scientific terminology means a cognitive style that is able to resolve the contradiction between the finite vocabularies and the infinite objective things. Fuzzy ontology is the general representation of ontology, and approaches to the essence of the objective world. Fuzzy ontology with functions of fuzzy diagnosis and fuzzy inference can effectively support human cognitive practices. It is necessary for intellectualization of information processing to put the fuzzy ontology into computers. The machine expression form of a fuzzy ontology is an OWL document at present. An example is given to illustrate the process of constructing a fuzzy ontology.

Key words: fuzzy ontology, fuzzy concept, fuzzy concept relation, fuzzy, cognition