       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 or UTF data.

              This command is provided by Extended Tcl.
