5.1.2 Components

5.1.2.1 Keyword (bytes 1-8)

 The keyword shall be a left justified, 8-character, blank-filled, ASCII  string with no embedded blanks. All digits (hexadecimal 30 to 39,``0123456789'') and upper case  Latin alphabetic characters  (hexadecimal 41 to 5A, ``ABCDEFG HIJKLMN OPQRST UVWXYZ'') are permitted; no lower case characters shall be used. The underscore  (hexadecimal 5F, ``_'') and hyphen  (hexadecimal 2D, ``-'') are also permitted. No other characters are permitted. For indexed  keywords with a single index the counter shall not have leading zeroes.

5.1.2.2 Value Indicator (bytes 9-10)

  If this field contains the ASCII characters ``='', it indicates the presence of a value field associated with the keyword, unless it is a commentary keyword  as defined in §5.4.2.4. If the value indicator is not present or if it is a commentary keyword then columns 9-80 may contain any ASCII text.

5.1.2.3 Value/Comment (bytes 11-80)

  This field, when used, shall contain the value, if any, of the keyword, followed by optional comments. The value field may be a null field; i.e., it may consist entirely of spaces. If the value field is null, the value associated with the keyword is undefined. If a comment is present, it must be preceded by a slash (hexadecimal 2F, ``/''). A space between the value and the slash  is strongly recommended. The value shall be the ASCII text representation of a string or constant, in the format specified in §5.2. The comment may contain any ASCII  text.