       ccollate ?-local? string1 string2
              This  command  compares two strings.  If returns -1
              if string1 is less than  string2,  0  if  they  are
              equal and 1 if string1 is greater than string2.

              If  -local  is  specified, the strings are compared
              according to the collation environment of the  cur-
              rent locale.

              This command does not work with binary data.

              This command is provided by Extended Tcl.
