1. The sequence 'Vowel+Virama+Ya...' is illogical to scholars of Bengali and indeed Indic languages in general.
I refuted this yesterday by indication that this usage is an innovation.
2. Such sequences are not semantically equivalent to the intended
... sentence fragment.
3. There are no other cases of a Vowel+Virama combination in the Unicode encoding model.
Yes, there are. Khmer.
4. Yaphalaa is not equivalent to 'Virama+Ya'
Yes, it is, as I showed yesterday.
5. ISCII implementations encode these letters as separate characters corresponding to the Devanagari Candra A & E. Unicode should follow the example of these implementations.
No, it shouldn't. Unicode has a method for writing these sequences already and a second method for doing so should not be introduced. Use mapping tables to exchange ISCII and Unicode data.
--
Michael Everson * * Everson Typography * * http://www.evertype.com
