15.64.10  CHARACTER 

SET CHARACTER {TERMINATOR|SEPARATOR|SPECIAL|ALPHA|ILLEGAL|COMMENT |
          ENDCOMMENT} "characters"
This  redefines the input character set.  You may not redefine the letters
"A" to "Z", the numbers "0" to "9", the period "." or the minus  and  plus
signs "-+".  The current definitions are:
     1.  SEPARATORS = ",/="
     2.  TERMINATOR = ";"
     3.  SPECIAL = "@!#$%^&*~`{}|\[]"
     4.  COMMENT = "("
     5.  ENDCOMMENT = "("
     6.  ALPHA = "_"
     7.  ILLEGAL = all non printable characters.
Special  characters  may  be imbedded inside an option, but may not be the
first character in an option.