This paper first introduces standard XML reference instants and XML data instants based on the weighted XML data model. Then it displays the expression ways of constraints in DTD. Furthermore, the paper also shows the approaches on how to implement similarity algorithm，with an emphasis on how to find out a matching node with standard XML reference instants and to get the similarity algorithm of standard XML reference instants and that of XML data instants.
李树青,程国达,王维民. 基于加权XML模型的XML数据与DTD模式匹配*[J]. 现代图书情报技术, 2010, 26(1): 57-65.
Li Shuqing,Cheng Guoda,Wang Weimin. The Schema Matching of XML and DTD Based on Weighted XML Data Model. New Technology of Library and Information Service, 2010, 26(1): 57-65.
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