Study of Normalization Existing MVD in XML DTD
存在多值依赖的XML DTD规范化研究

XML DTD documents may contain data redundancies and operation anomlies due to non-functional dependencies.First the normalization problem of XML DTD is studied,which should avoid the occurrence of redundant information in documents,discusses how to narmalize XMLdocument when existing MVD in XML DTD document,The concept of multi-valued dependency for XML documents with DTDs as their schemas is proposed in this paper.Second a XML normal form,Multivalued XML Normal Form(MXNF),is defined based on the concept of multi-valued dependency.Finally,a lossless join decomposition algorithm for transforming an XML document's DTD into MXNF is also given,and to normalizing this XML DTD document.