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The web has become a very important source of information for users (students, researchers, general public, etc.) and commercial enterprises. This propulsion of data is related to the diversity of requests for information and the need for versatile knowledge. Access to digital data via web services is facilitated by search tools. Following a request from the user, the search engine has a long list of informational responses, but often containing parasitic pages. Although before the appearance of the web, the searc...

Access to digital data through web servers and databases is facilitated by search tools. Following a user query, the search engine has a long list of bibliographic references and web pages. The efficient selection of relevant documents is very difficult given the low accuracy in the list. Typically, the user visits the first page referenced in the list, but it does not consult the fiftieth. In this article, we describe the problem of the queries language when we look for information in an automatic system (search ...