Dag Lem <dag@nimrod.no> writes:

> Hello,
>
> Please find attached a patch for the daitch_mokotoff module.
>
> This implements the Daitch-Mokotoff Soundex System, as described in
> https://www.avotaynu.com/soundex.htm
>
> The module is used in production at Finance Norway.
>
> In order to verify correctness, I have compared generated soundex codes
> with corresponding results from the implementation by Stephen P. Morse
> at https://stevemorse.org/census/soundex.html
>
> Where soundex codes differ, the daitch_mokotoff module has been found
> to be correct. The Morse implementation uses a few unofficial rules,
> and also has an error in the handling of adjacent identical code
> digits. Please see daitch_mokotoff.c for further references and
> comments.
>
> For reference, detailed instructions for soundex code comparison are
> attached.
>
>
> Best regards
>
> Dag Lem
>