Knowledge plays a key role in knowledge management, while no adequate attention has been paid on how to construct knowledge repository by means of the existing resource. On the basis of analysis multiplex characteristics of process knowledge of complex product under collaborative design between enterprises, a representation and building method of domain ontology and service ontology is proposed for process knowledge of complex product in the semantic environment. Structure architecture is presented to build process knowledge ontology by protégé modeling tool, and process knowledge is formalize described based on description logic language OWL. As the association among different ontologies in the semantic hierarchy, the similar and relative degree among product process ontology concept was analyzed in semantic evaluation method, then an ontology concept set of relationship measurement was designed. According to these methods, many meaningful tasks of searching and clustering of process knowledge under semanteme ontology description were achieved, and so effective integration and sharing among process resources were guaranteed as a result.
