Extensible Markup Language;  Document Object Model;  Parsing techniques

The main technical links of XML document application are introduced, two different XML document parsing technologies based on event-driven and tree-based structure are analyzed, the characteristics and applicable environments of event-driven and tree-based parsing technologies are compared, and the method of converting streaming text data into XML data by using XML parsing technology with tree structure is given, which solves the problem of converting the residual data of patent application documents into XML files.