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This standard provides information on the smart metering use cases and on architectures supported by the IEC 62056 DLMS/COSEM series of standards specifying electricity meter data exchange. It describes the standardization framework including: - the principles on which the standards shall be developed; - the ways the existing standards shall be extended to support new use cases and to accommodate new communication technologies, while maintaining coherency; - the aspects of interoperability and information security. The committee responsible is DKE/K 461 "Elektrizitätszähler" ("Electricity meters") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.