[XeTeX] Polytonic greek and XeLaTeX

[John Was]

Hi

> U+1FBF GREEK PSILI is a different matter; this is a "spacing" version
> of the mark, and should not normally be used in text, as far as I
> know. I suppose it could be useful when writing about the diacritic
> itself, rather than using it in combination with a vowel.
>
> JK
>

The Greek asper and lenis (as classicists normally refer to them) are 
actually very useful in roman-alphabet contexts for transliteration of 
Arabic (etc.) names.  I mentioned in a different thread that this is one 
case where it would be useful to have the ability to add my own kerns to a 
font, just in case the asper and lenis did not look well adjacent to a roman 
capital letter.  (There's no particular reason why a font designer working 
out the best kerns for the Greek area of Unicode should think to supply 
kerns between Greek characters and roman-alphabet characters, but it's 
typical of academic work that this kind of odd and unpredicted requirement 
may arise.)

Best


John