Through analyzing the present situation of information service on Internet,the paper points out that the model of information service based on WWW search engine has been outdated.Directed by the two advanced theories of informatics in 1990s,which are the theory of ASK and Domain Analysis,and using the novel technology of Intelligent Agent,a new model of information service based on the principle of user-orientedness and subject-orientedness is developed.It's also explained that the new model is more suitable for the future.
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