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Choosing a suitable career may be difficult for students because they have to consider many if they want to be on the best path. Today, E-orientation systems are designed to help students to find the best way for their academic and professional lives. In this context the research center within the University Hassan II Mohammedia AinChock announced the appearance of MMSyOrientation project. This project focuses on the orientation of Moroccan. Our aim here is to have creatable meta-model of E-orientation platforms to make it easy for student to get oriented. In order to obtain the goal mentioned above, a comparative study of the existing platforms proves to be essential with regard to the particularity and the characteristics of the existing platforms. In this paper, we present a new approach to comparing E-orientation platforms based on the Web Services Description Language (WSDL). The work is divided into two parts: The first is a description of the existing E-orientation platforms using the WSDL and the second is how to process WSDL files using XSLT technology.