Each fieldbus device contains an internal set of data relevant mainly for automation and control tasks, but also suitable for maintenance purpose. In addition, other device-related data are available outside the device, like descriptions, instructions, or even pictures and multimedia files. Thus, the device can be treated as central part of a complex information set. This information set is used by software tools throughout a device's life cycle, e.g. configuration, commissioning, parameterization, diagnosis, repair, firmware update, asset management, audit trailing, etc. The paper describes an extensible, flexible, distributed Web-based information platform and presents an application example for PROFIBUS/PROFINET systems