Web Information Extraction Technology Research Based on Ajax

Along with the rapid development of Internet, research of information extraction in the field has been extensive concerned by scholars. However, with the widely application of Web2.0, the traditional web information extraction technology can´t meet the needs of users. The traditional web information extraction is mainly directed against the static HTML pages, while it is powerless with the dynamic web page which contains Ajax. So, how to efficiently extract information in dynamic web pages becomes one of a difficult problem in the information extraction field. In this paper, a method about web information extraction based on Ajax is proposed through the thorough investigation into the traditional Web information extraction. Compared with the traditional web information extraction technology, its advantage is embedded with a dynamic web processing engine in the process of DOM (Document Object Model) tree produce. The engine will be used exclusively to analytic the dynamic web pages for the DOM tree and real-time update the DOM tree. Experimental results show that, this method can better extract information of dynamic web pages.