Abstract: A multi-ontology system based access control approach for semantic Web services was proposed. First, a bridge ontology based cross domain multi-ontology system (CDMOS) , which provides a semantic model for access con- trol of Semantic Web Service,was presented based on the distributed description logic (DDL). Secondly,on the basis of semantic access control technology, the access control model for semantic Web service was given. Finally, this paper gave the architecture of multi-ontology system based access control approach for semantic Web service and the case study of this approach. In the access control for semantic Web service,CDMOS not only provides the semantic mapping for the semantic model of security domains, but also ensures the semantic independence among the security domains.

Key words: Semantic Web service, Multi-ontology system, Access control