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What are FLAG IDs for

FLAG ID usages

FLAG IDs are used for electricity, gas, heat and water metering systems in conjunction with one or more of the following standards for meter data exchange; new standards may be added in the future.

  • DLMS/COSEM Blue Book and Green Book;
  • IEC 62056 DLMS/COSEM (IEC version of the Blue Book / Green Book);
  • EN 13757 M-Bus;
  • EN 1434-3 Heat meters;
  • ISO 22158 Water meters.
FLAG IDs may be used for on or more of the following usages; new usages may be added in the future.
  • electricity;
  • water;
  • gas; and/or
  • thermal energy.

FLAG ID structure

ABC = aBC, AbC, ABc, abC, aBc, Abc, abc.

A FLAG ID consists of three upper case letters taken from the ISO basic Latin alphabet (26 letters).

With this, 17 576 FLAG IDs are available. Currently (July 2018) 1 303 FLAG IDs are registered. With growing number of manufacturers and usages, FLAG IDs are allocated sparingly: the DLMS UA – in partnership with the FLAG Association – applies strict control over FLAG ID registrations.

The manufacturer may use any combination of the three letter sequence registered in upper case and lower case e.g. the registration of ABC implies the registration of aBC, AbC, ABc, abC, aBc, Abc, abc.