Re: plain ASCII version of TSCII charset registration request

[Kenneth Whistler <kenw@sybase.com>]

I'm not otherwise commenting on this registration, but:

> Published Specifications:
>    http://www.tscii.org/tsciispec.html
> 
> ISO 10646 Equivalency Table: 
>  Available as a technical note at the Unicode Consortium website
>    http://www.unicode. org/notes/ tn15/

That Technical Note #15 is out of date, reflecting the state
of affairs as of Unicode 4.0. It contains two notes regarding
the likelihood of the encoding of a Tamil digit zero and a
Tamil sha, but before they became final. In Unicode 5.0
the final code points are:

U+0BE6 TAMIL DIGIT ZERO

U+0BB6 TAMIL LETTER SHA
 
> As a glyph-based encoding, TSCII codechart includes vowels, consonants
> and abugida (compound vowel-consonant) characters. Unicode, as a
> character encoding encodes only vowels and consonants. Hence not all
> codepoints of TSCII can be converted one-to-one with ISO 10646.

What that means is that the referenced technical note is
incomplete currently as regards the 10646 equivalency of the
following two elements in TSCII:

> 80  TAMIL DIGIT CUZHI = Tamil digit zero

> 82  TAMIL GRANTHA LETTER SRI = Tamil letter sri

--Ken