Abstract: The semantic Web is a dynamic changing envrionment, so, the ontology, which is the basis of semantic Web, should evolve to cope with the change of enviroment. This paper analyzed the concept of ontology change and ontology change management, and then devi

Key words: Ontology change, Ontology change management, Ontology evolution, Ontology versioning, Multi-version ontology reasoning, Inconsistent ontology reasoning, Ontology debugging, Ontology modularization