[XeTeX] Incorrect rendering of Vedic Sanskrit accents

[Arthur Reutenauer]

> First, this is only describing how Uniscribe handles this situation;
> its not clear that makes this behaviour a normative part of the Indic
> script specification.

  Well, unfortunately, Uniscribe was for years the reference
implementation, and there was no formal Indic script specification, so
this description was in a way normative, if by default.  But, as you
point out, it's quite dated now anyway.  And clearly not relevant to
your main issue.  I really hope that someone can pick it up and analyse
the actual issue with Vedic Sanskrit accents.
	
	Best,

		Arthur