[XeTeX] Malayalam typesetting using XeLaTeX

[NMPOST7]

On 14/11/2013 00:16, Zdenek Wagner wrote:
> This option is not available. Have a look at the
> devanagarinumerals.map. Save it eg as malayalamnumerals.map and
> replace the codes of the devanagari digits with the malayalam ones
> (just change the bloch, positions in all indic blocks are the same).
> Compile it with teckit-compile and then use Mapping=malayalamnumerals
> when defining the font (I use it regularly in my Hindi texts).

Thank you. However, where is devanagarinumerals.map located? (I tried the
whereis command to no avail.

Although I use LaTeX, I am a self taught person and do not know anything of the
internals.

BR
suren