[XeTeX] Roman Numerals as stylistic alternatives

[Arthur Reutenauer]

> I'm not entirely convinced that I agree.  I would argue that the "C"
> of "CXV" means "100", not "1"; in "CMXV" it means "subtract 100".
> At least, that's what we were taught at school !

  Yes, but if you want to transcribe into Arabic numerals you have to
translate "C" as "1" in the first case, and the combination "CM" as "9"
in the second case.  All in all, that's very awkward to do at the
character level.

	Arthur