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The first part of the paper describes the method and tools EDF has developed to create a unique integration infrastructure designed to automate EDF business processes and facilitate future evolutions. The approach to deploy CIMin EDF environment, is a Top-Down approach which creates messages (used to connect two applications) from an Information Model based on CIM. This method is based on the United Nation standard UN-CEFACT Core Component Technical Specification. The key idea is that the CIM could play the role of the Core Component model of the Electrical Industry. The second part of the paper highlights the implementation of CIM interfaces within ERDF (Electricite Reseau Distribution France) Information System. After having implemented CIM interfaces between ERDF Distribution Network GIS and MV and LV planning tools, the main project under development is the integration of GIS to DMS. A pilot for all ERDF Distribution Network Control Centers (30 covering France) is in Paris Control Center. Furthermore, a roadmap for CIM deployment within EDF Distribution Information System is being established. The third part gives an overview of the remaining challenges and how new R&D project DIGI2TAL will address them. Smart grids will exist if a semantic-based integration infrastructure is achieved.