Abstract
In this paper, we describe the composition of metadata, which is required for structuring of description knowledge by using the ontology technology of Semantic Web. In this research, machine design knowledge is chosen as web resource and the structured metadata is written in ontology language, OWL (Web Ontology Language). By the ontology, which can automatically calculates the hierarchical relationship and the adjustment during the metadata definition relation between metadata, data sharing and advance searching become easy in the web environment, thus increase the efficiency of mechanical designing processes.
