5Smiraglia, R.P.Content metadata: an analysis of Etr- uscan artifacts in a museum of archeology[J]. Cataloging & Classification Quarterly, 2005, 40: 135-151.
6Chandler D. Semiotics for Beginners, Oxford, Rout- ledge, Oxford. {EB/OL]. [2014-05-18]. http:// www. aber,ac.uk/dgc/semiotic.html.
7Margolis E, Laurence S. Concepts, Stanford Ency- clopedia of Philosophy[M]. London: Macmillan, 2005.
8Alon Friedman, Martin Thellefsen. Concept theory.' and semiotics in knowledge organization [J].Journal of Doccumentation, 2011, 67 (4): 644-674.
9Zeng Lei, Athena S. Toward an international sharing and use of subject authoriW data. [EB/OL]. [2014- 05-18]. http: //www.oclc.org/research/events/frbr- workshop/presentations/zeng/Zeng_Salaba.ppt.
10Gall H. Systems of knowledge organization for digital libraries: beyond traditional authoriW files [J]. Wash- ington, American: The Digital Library Federation, 2003 : 4-7.
