5Marcia Lei Zeng.Supporting Metadata Interoperab.1ity:Trends and Issues.Global Digital Library Development.Beijing:Tshinghua University Press,2002.
6Pierre,M.,Laplant,W.P.Issues in Crosswalking Content Metadata Standards.October,1 998.http://WWW.niso.org/perss/whitepapers/crsswalk.html.
7Lagoze,Carl.et a1.An Event—Aware Model for Metadata Interoperability http://www.cs.cornell.edu/lagoze/papers/ev.pdf.
8Hodge,Gail.Metadata Made Simpler.http://www.niso.org/news/metadata—simDler.Ddf.
9Duwal,Erik.et a1.Metadata Principles and Practicalities.D—L.b Magazine.April 2000.http://www.dlib.org/april02/weibeI/04weibel.htm.
10PAEPCKE A, CHANG CCK, GARCIA-MOLINA H, et al. Interoperability for Digital Libraries: Problems and Directions[EB/OL]. http://newdbpubs.stanford.edu/pub/1998-24,2003-01.