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Overview / excerpts of the DLMS UA coloured books DLMS UA coloured books (password protected area) DLMS/COSEM specification DLMS/COSEM specification maintenance List of proposed amendments Approved Amendments List and maintenance of standard items List of standard OBIS codes and COSEM objects OBIS code maintenance process Requests for adding a new standard OBIS code List and maintenance of standard interface classes

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DLMS UA coloured books (password protected area)

The DLMS/COSEM specification is fully described in the DLMS UA coloured books:

• the Blue book describes the COSEM meter object model and the object identification system
• the Green book describes the Architecture and Protocols
• the Yellow book treats all the questions concerning conformance testing
• the White book contains the glossary of terms

The books are available for all members of the DLMS UA free of charge. Excerpts of the books are publicly available.

• View full version of the Blue Book (10th ed.)
• View full version of the Green Book (7th ed.) and its Amendment 2
• View full version of the Yellow Book (4th ed.)
• View the White Book (1st ed.)

The specification became an International Standard for electricity, heat/cooling, gas and water metering.