scope:

This part of 62056 specifies the COSEM application layer in terms of structure, services and protocols for COSEM clients and servers, and defines how to use the COSEM application layer in various communication profiles. It defines services for establishing and releasing application associations, and data communication services for accessing the methods and attributes of COSEM interface objects, defined in 62056-62, using either logical name (LN) or short name (SN) referencing. Annex A describes the xDLMS application service element. Annex B defines how to use the COSEM application layer in various communication profiles. Annex C includes encoding examples for APDUs. Annex D gives an explanation of the role of data models and protocols in electricity meter data exchange.