/[NO]CHARACTER_DEFINITIONS[=filename]
     /NOCHARACTER_DEFINITIONS (D)

   Specifies a character-set description file (charmap) for the
   locale.  This file maps characters to their actual character
   encodings.  If a charmap is not specified, no symbolic names
   (other than collating symbols defined in a collating symbol
   keyword) are allowed in the locale source file.  The default file
   type for a charmap is .CMAP.