The DLMS UA Core Specifications include an object-oriented data model, an application layer protocol and media-specific communication profiles, that standardize message types for various operations, such as reading and writing data. Additionally, it also includes rules for formatting and transmitting these messages.
OBIS application models are specified in the Blue Book Part I
(COSEM applications models are specified in the Blue Book Part II)
Latest version available DLMS UA 1000-1 Ed 17 Part 1 V1.0
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