2BRUNET R. La carte-moldele et les choremes [Z] . Mappemonde, 1986, 86/4: 4-6.
3Gruber T R. A Transation Approach to Portable Ontologies Specification [ J] . Knowledge Acquisition, 1993, 5(2): 199-221.
4P Borst, H Akkermans. Engineering Ontologies [J] . International Journal of Human-Computer Studies, 1997, 46: 365-406.
5Studer R, Benjamins V R, Fensel D. Knowledge Engineering, Principles and Methods [ J ] . Data and KnowledgeEngineering, 1998, 25( 122): 161-197.
6Nicola Guarino. Semantic matching: formal ontological distinctions for information organization, Extration and Integration [ C] //Information Extraction: a Multidisciplinary Approach to an Emerging hfformation Technology. Frascati: Springer Varlag, 1997.
7Alexander Klippel. Wayfinding Choremes-Conceptualizing Wayfinding and Route Direction Elements [ M] . Ph. D dissertation, 2003.
8R LAURINI, Francoise Milleret-Raffort. A Primer of Geographyic Databases Based on Chorems [ M ] . OTM Workshops 2006, LNCS 4278. 2006: 1695.
