char-string - This is an IETF RFC 2579 DisplayString, with the exception that the character codes 0-31 (decimal) are not used. icc-umc - this consists of two subfields: (1) The ITU Carrier Code (ICC) followed by a unique MEG ID code (UMC). The ITU Carrier code consists of 1-6 left-justified characters, alphabetic, or leading alphabetic with trailing numeric. (2) The UMC code immediately follows the ICC and shall consist of 7-12 characters. The UMC shall be a matter for the organization to which the ICC has been assigned, provided that uniqueness is guaranteed. cfm - indicates the MEG name will follow the formatting rules defined by IEEE 802.1ag Connectivity Fault Management. It will comprise of two names: a Maintenance Domain Name and a Maintenance Association Name. Each name will have an associated name format.