5Nicola Guarino. Formal ontology and information systems. In: N. Guarino, editor, Proceedings of the 1st International Conference on Formal Ontolngies in Information Systems. FOIS'98. Trento. Italy, IOS Press. 1998.
4[15]Guarino N.Semantic Matching:Formal Ontological Distinctions for Information Organization,Extraction,and Integration.In:Pazienza M T,eds.Information Extraction:A Multidisciplinary Approach to an Emerging Information Technology,Springer Verlag,1997,139～170
5[16]Perez A G,Benjamins V R.Overview of Knowledge Sharing and Reuse Components:Ontologies and Problem-Solving Methods.Workshop on Ontologies and Problem-Solving Methods:Lessons Learned and Future Trends (IJCAI99),de Agosto,Estocolmo,1999
6[17]Gruber T R.Towards Principles for the Design of Ontologies Used for Knowledge Sharing.International Journal of Human-Computer Studies,1995,43:907～928
7[18]Guarino N,Welty C.A Formal Ontology of Properties.In:Dieg R,Corby O,eds.the Proceedings of the 12th International Conference on Knowledge Engineering and Knowledge Management (EKAW'2000),Springer Verlag,2000,97～112
8[19]Guarino N,Masolo C,Vetere G.OntoSeek:Content-Based Access to the Web.IEEE Intelligent Systems,1999,14(3):70～80
9[20]Shun S B,Motta E,Domingue J.ScholOnto:an Ontology-based Digital Library Server for Research Documents and Discourse.Intl J Digital Libraries,2000,3(3):237～248
10[21]Arpirez J,Perez A G,Lozano A,et al.(Onto)2 agent:An Ontology-based WWW Broker to Select Ontologies.In:Gomez-Perez A,Benjamins V R,eds.Proceedings of the Workshop on Application of Ontologies and Problem-Solving Methods UK,1998,16～24
