3Smith B , and Mark D M. 1999. Ontology with human subjects testing[ J ]. American Journal of Economics and Sociology 58(2) : 245 - 272.
4Frank, A. ( 1997 ) Spatial Ontology: A Geographical Point of View[ A ]. in: O. Stock, ( Ed. ) Spatial and Temporal Reasoning[ C]. pp. 135 - 153, Kluwer Academic Publishers, Dordrecht,The Netherlands.
5Egenhofer M J , Glasgow J , Gunther O, et al. Progress in computational methods for representing geographical concepts[J] .Geographical Information Science , 1999 , 13(8) :775 - 796.
6Gruber, T. ( 1991 ) The Role of Common Ontology in Achieving Sharable, Reusable Knowledge Bases [M]. in: Principles of Knowledge Representation and Reasoning, Cambridge, MA, pp.601 -602.
7Guarino, N. (1998) Formal Ontology and Information Systems[A]. in: N. Guarino, (Ed.) Formal Ontology in Information Systems[Cl. pp. 3-15, IOS Press, Amsterdam, Netherlands.
