The goal of IEC 61850 is to support arbitrary system configurations with centralized or decentralized architecture. The choice of a specific system architecture is beneath pure technical aspects determined by the existing products and proven solutions. As technology advances, other kinds of architectures may become usable and cost optimal, which lead to a different amount of IEDs and a different internal structure of them, which is reflected in the IED related identification of data. On the other hand, low effort long term maintenance needs identical names for identical objects. But even at the replacement of an IED by a functional equivalent IED from another manufacturer a different internal structuring and naming is most likely. More