Since it is not that hard to implement a Check Digit Scheme incorrectly it
would be very helpful to
publish a canonic set of "Testvectors" showing the checkdigits as calculated by
several algorithms.
This would it make easier to check if a new implementation or tweaking of an
existing
implementation broke anything.
This seems to be most urgently needed with Verhoeff's Dihedral Check Digit
since the different
implementations available on the net produce different results.
Original issue reported on code.google.com by
[email protected]on 29 Oct 2007 at 6:14