Extracting Web Data Using Tree Structure

Information retrieval is the technique that searches the useful information from abundant data.But the common way of web information retrieval is based on the analysis of HTML documents on the web.Provides a kind of method that transform HTML into XML first,and then get information.XML is a language standard,which is used to deseribe the format of data documents in data exehange.It makes the strueture,content and representation separated.The data can be identified uniquely by XML.And then,it helps people organize and seareh the data.The proposed approach can effectively extract desired data with high accuracies and with linear complexity.