Abstract
With the development of information technologies many researchers and instructors are interested in the educational resources on the Web. All the resources are described as Learning Object which focuses on reusability and automation. Learning Object is a central notion of the majority of current researches to Web-based education, and many institutions devote themselves to research the standardization of learning object. After analyzing Learning Object's definition and metadata the authors emphasize that the metadata alone is not enough because it is lack of semantic and reasoning capability. Semantic Web is put forward to solve the semantic problems in current Web. Ontology is the core concept and technology in this framework. In order to reuse and share learning object better, the ontology-based description of learning object is expatiated, meanwhile this paper provides a learning object ontology with the development tool Protege. At last a shareable model in Semantic Web is mentioned.
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