[XeTeX] OpenType: script & language

[Will Robertson]

Hello!

I'm wondering about implementing the OpenType script and language 
features into fontspec. It looks a little daunting, considering the 
number of tags defined for each. (e.g. 
<http://www.microsoft.com/OpenType/OTSpec/languagetags.htm>).

Do you think it would be worthwhile putting some sort of giant list 
inside fontspec correlating language and script tags with their 
real-life equivalents? (It's not so bad using keyval. I hope.)

This would result in being able to say 
\fontspec[Script=Mongolian,Language=Zulu]{Code2000}, whatever that 
would happen to mean.

I assume this works only for OpenType fonts and using the syntax
   \font="Code2000:script=mong,language=ZUL ,..."
Is this the whole story?

I haven't actually worked out the difference between the two; surely 
the fact that you're using characters from a certain unicode range 
would mean that you're using a script of whichever sort...

Regards,
Will