> What about GREEK OXIA vs GREEK TONOS as standalone characters? Should
> we replace the former with the latter?

I'm not sure; see my other message.  AFAIK vowels composed with oxia
decompose to their tonos counterparts, but not so oxia itself.  I'm
still confused as to what Quail should do with these equivalences.
Should it always use the simplest possible composition?

Thanks,

-- 
Basil