Study Of Storage Model In Native XML Database

With the development of network technology, XML was applied more and more frequently in various fields, in order to manage a large of XML data effectively, native XML database was born. The storage model of the database is based on the characteristics of XML data. Because of its internal storage model to maintain the tree structure of XML data, the database is called as the "native" XML database, in addition, XML-related technologies can be used to access the data directly, such as Xpath, DOM, Xupdate. Its approach is more effective for XML data. Storage model is the basics for all operations in native XML database, so the research in this area is of great value.Firstly, this paper introduces the research background and development status, basics of XML-related and native XML database. Then the author analyzed storage technology of the existing native XML database in detail, including granularity and order, storage solutions and logical model based on different physical storage format. The analysis of the storage model is the focus of this paper. By studying the storage code of native XML database Xindice, its storage model is summed up as follows:symbol table and DOM compression. This storage model is based on the format of compressed file. The model can not only maintain the tree structure of XML documents, but also achieve a certain compression ratio. This paper propose a improvement plan about symbol table based on XML Schema for this model, this program can improve the storing time of the database.