Tamil Brahmi Short Mid Vowels

[Richard Wordingham via Unicode]

On Wed, 29 Aug 2018 21:42:57 +0000
Andrew Glass via Unicode <unicode at unicode.org> wrote:

> Thank you Richard and Shriramana for bringing up this interesting
> problem.
> 
> I agree we need to fix this. I don’t want to fix this with a font
> hack or change to USE cluster rules or properties. I think the right
> place to fix this is in the encoding. This might be either a new
> character for Tamil Brahmi Puḷḷi — as Shriramana has proposed
> (L2/12-226<http://www.unicode.org/L2/L2012/12226-brahmi-two-tamil-char.pdf>)
> — or separate characters for Tamil Brahmi Short E and Tamil Brahmi
> Short O in independent and dependent forms (4 characters total). I’m
> inclined to think that a visible virama, Tamil Brahmi Puḷḷi, is the
> right approach.

While this would work, please remember that refusing to allow a virama
after a vowel also makes USE inappropriate for Khmer and Tai Tham,
which use H+consonant rather than consonant+H for subscript final
consonants.

Richard.