7Smith B L, William T S. Development of integrated intelligent transportation system [A]. Transportation Research Record 1675[C]. Washington D C: TRB, 1999.85-90.
8Sheth A. Changing focus on interoperability in information system: from system, syntax, structure to semantics [A]. Interoperation Geography Information Systems[C]. kluwer, Academic Publishers, 1998.5-30.
9Staab S,Stude R. Knowledge processes and ontologies[J].IEEE Intelligent Systems,2001(1):26-34.
10Guarino N, Masolo C, Vetere G. Ontoseek: Content-based access to the web[J]. IEEE Intelligent Systems, 1999, 14(3): 70-80.
