From: Anirban Mitra (mitra_anirban@yahoo.co.in)
Date: Sun Dec 01 2002 - 00:24:20 EST
Unicode is considered a superset of ISCII 91 except extended vedic
charecters. However while trying to develop a convertor from ISCII
to Unicode for Bengali, I faced the following problem.
Unicode FAQ states that for sounds like "a" in "admission"
transliterrated in Bengali, you have to use
VowelA_Virama_Ya_MatraaAa. This is backwards incompatible with
ISCII. On the other hand, ISCII based appliacation (like
iLeap)considers this combination as a new Composite vowel and codes
it to the code point corrosponding to Candra_E of Devanagari. This
use is quite logical as both has same pronounciation and used in
identical situations. Moreover ISCII do not allow placement of a
virama after a vowel as virama strips a consonant from its inherent
vowel and hence can not sit after a vowel.
Another problem is ISCII-91 considers Bengali Ya equivalent to
Devanagari Ya_nukta and Bengali Yya equivalent to Devanagari Ya.
But unicode considers the opposite.
Pardon me for posting same question again, but I did not receive
any answer from Unicode experts last time I posted the query.
Thanks
Dr Anirban Mitra
E-mail: mitra_anirban@yahoo.co.in
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