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In order to access, visualize, aggregate and analyze their data, the organizations generally use the techniques of data warehouses and OLAP (On-Line Analytical Processing). We distinguish two categories of data: structured (such: databases), and unstructured (such: Documents). In order to store and manage these both kinds of data, organizations exploit increasingly the advantages of XML (eXtensible Markup Language); it constitutes an important source for decision-makers to help them todoi:10.30534/ijeter/2019/387112019 fatcat:3x2h2fy3hbdzvechrbgxzi3c4i