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2IFLA.Digital libraries:metadat resources[Z].Internet WWW page,at URL:[Z].http://www.iflaong/Ⅱ/metadata.htm(version current at 12 March 2000).
3W3C.Resource Description Framework(RDF) Model and Syntax Specification.[Z].http://www.w3.org/TR/1999/REC-rdf-syntax-19990222
4Cilliland-Swetland,Anne J.Defining metadata.In:Baca,Murtha,ed.Introduction to metadata:pathways to digital information [M].U.S.A.:Getty lnformation Institute,1998,3.
