The Research Of Tax Information Query System Based On XQuery

XQuery is a newly emerged techonology, which is mainly intended for use for use with data and use as a language for data integration. This article is mainly about the use of the XQuery and its applications in the query system of taxation information, with the purpose to eliminate the isolated island of information and satisfy the need of data integration. Firstly, the article studies and analyzes the relative techonology of XQeury, including the XML sytax, DTD, namespace, XML schema and XQuery. Then based on the previose stuty, we studies and analyzes an implementation of XQuery – Qizx, which is an open-source software, and mainly discusses how to use Qizx to query the data of the relation database and translate it to XML. Based on this, we discuse the theory of the data integration system which base on Qizx, and detail the steps of integration. Next, we analyze the requirement of the system, and get the Use Case model as well as their specification. Futhur more, we detail the core code of the system. Finally, we design the XML, which store the system data, based on the XML design pattern and the system requirement. Including the XQuery technology into the query system of taxation information and using it to provide a data integration platform. Using it, we can query information from various datasource, eliminate the isoland of information. In addition, the methods in this article can be used in many similar cases.