Research And Application Of VTD-XML Parsing Technology

The application of XML is becoming increasingly widespread, and the XML parsing technology is the key of it. How to correctly and efficiently parse XML data is very important, especially for large amounts of data. Improper use of parsing technology leads to excessive consumption of memory, long time of processing, thus affects the scalability.This paper firstly introduces the development of XML parsing technology, studies two current mature parsing technology—DOM and SAX in structure, working principle and analyzes their advantages and disadvantages. After analyzing the disadvantages, this paper studies deeply a new XML parsing technology based on Virtual Token Descriptor—VTD-XML, which overcomes the disadvantages of DOM and SAX, and combines the advantages of the both through clever design, greatly improving analytical efficiency. Then this paper compares parsing performance of the three, and analyzes VTD-XML's advantages over the other two in parsing speed, memory usage and navigation. In addition, this paper proposes an improvement after insighting design principles and analytical methods of VTD-XML and vertifies its feasibility through testing. Finally, this paper achieves VTD-XML's application in the processing of Office document in Teaching Platform, and improves processing-efficiency and teaching-effectiveness.