ccollate is a command within the Tclx package.
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 current locale.This command at one point did not work with binary or UTF data.