Awareness ontology model in the collaborative learning environment

In order to organise the awareness information in the collaborative learning environment reasonably and efficiently, making good use of the ontology characteristics such as clear knowledge organization, explicit definition of concept and relation etc, an awareness ontology model is presented in this paper. The model contains six aspects: person, community, role, KnowledgeDomain, event and activity as well as each kind of relations among these concepts and in the concept interior. This model can solve the existing flaws like chaotic organization and difficult maintenance in the traditional mode of awareness information organization. Thus enhances collaborative learning efficiency in the greatest degree. For constructing needed ontology reasonably and conveniently, a method of KnowledgeDomain correlativity extraction based on the N-Grams is presented on the basis of awareness ontology model. It can extract the asrelativity? relation automatically and satisfy dynamic awareness processing