[CTX] [ALL]
CHARMAP parameter*  ==  CHARMAP=mapType:charMap[,charMap]*[:tosv]
           mapType  ==  ascii | ucs | jis | ucsjis | jisucs
           charMap  ==  inCharCode1[-inCharCode2]/outCharCode2[-[outCharCode2]]
          charCode  ==  hexa-decimal code | single ASCII character
                    --  default: none