Based On The Relationship Mode To Access XML Document Research

Along with the development of the Internet and network technology, more andmore web services has appeared, these web service contained large amounts of data.XML has recently emerged as the leading medium for data storage and data transferover the Web due to its adaptable structure and flexibility in defining the tags. Mostof the data stored in relation database, in addition to the relation database Relationshipmodel data and XML data which is semi-structured data provide a unified model anda unified operation way has a very significant research.In this paper, XML data source has been wrapped in the background of theintegration of heterogeneous data source information. First mapping XML Schema torelational model，and it reached a good balance between query efficiency and dataredundancy. In order to improve the efficiency of XML parsing,in this paperintroduce VTD-XML.In this system of integration of heterogeneous data source,all data will change to relational model and used JDBC connected data.Some ofXML data is stored in web service,only by XQuery can query the data. So I describethe issues and technical approach taken to converting SQL statements to XQueryexpressions and XQuery results to JDBC result sets.