[XeTeX] Roman Numerals as stylistic alternatives

[Philip TAYLOR (Webmaster, Ret'd)]

enrico.gregorio at univr.it wrote:

> When you highlight characters in a PDF and copy them you get the codes and
> all that it's attached to them. The problem with Roman numerals is that a
> "digit" has different meanings depending on the context. The "C" in "CXV"
> means 1, but in "CMXV" it means nothing by itself.

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 !

Philip Taylor