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Each field device contains a set of data for automation and control, but also for other stages in life cycle. In addition, device-related documentation like descriptions, instructions, pictures and multimedia documents exist. Thus, the device is a central part of a complex information set, usable by software tools throughout a device's life cycle, from configuration towards diagnosis, repair, and asset management. In heterogeneous networks containing devices from different vendors, the variety of the above-mentioned information requires a flexible, adaptable and extensible organizational structure for the information set. The paper describes such a system and presents an application example for PROFIBUS/PROFINET systems.