Discuss on XML Constrains and Their Applications
XML文档的约束及其应用探讨

The normalization, consistency and validity of XML document can be ensured when using restrictions. This paper discusses two kinds of restriction, one is an essential restriction based on XSD or DTD, the other is a self-defined restriction, XML function dependency, and also describes these two kinds of restriction and their validating methods. At the same time, this paper gives some examples about XML restriction and XML document in library operation.