Research On Dynamic Classification Navigation Model In Portal Web

In the environment of Web 2.0,the information resources of the portals are characterized by a large number,a wide variety,a variety of structures and a variety of information quality.Users generally obtain network information through the information retrieval and information navigation.The process of using website navigation is actually a process of obtaining information step by step through browsing categories.However,many portal websites still use the traditional information resource classification model.Generally,according to the relatively fixed classification principle,after many experts such as information experts have repeatedly tried and determined,once determined,it will not change for a long time.This has led to the static and fixed navigation system in the existing portals unable to adapt to the rapid changes of information resources and the dynamic changes of users requirements.This requires that the classified navigation system of the website should be dynamically set according to the changes of network information resources and users needs.Based on an in-depth analysis of the new characteristics of portal information resources and the new characteristics of portal users' information needs in the current network environment,this paper explored the improve thinking of classified navigation in portal,and then defined the meaning of dynamic classified navigation.The design principle,value and function of the model are explained.Then the necessity and feasibility of dynamic classification navigation applied to the portal website are analyzed.On this basis,the dynamic classification navigation model in the portal website is constructed and its construction process is explained.Then explored the techniques and methods involved in implementing the dynamic classification navigation model in the portal.Finally,taking the case of the largest medical academic website in China as a case,we explored the shortcomings on classification navigation and used the theory of this paper to conduct an empirical analysis on it.