https://bugzilla.redhat.com/show_bug.cgi?id=1427550



--- Comment #8 from Shriramana Sharma <[email protected]> ---
The OP has pinged me many times via direct mail but being busy I wasn't able to
respond to this issue till today.

First it should be understood that to keep things formally correct the OP
should submit a request to Unicode to allot any characters that he desires to
use with the Tamil script a ScriptExtension ("SE") of Taml
(http://www.unicode.org/Public/UNIDATA/ScriptExtensions.txt). Just adding the
characters to Lohit Tamil and adding appropriate OT tables may work but might
not be portable.

The OP is advised to use http://www.unicode.org/reporting.html or better still
submit a document as per http://www.unicode.org/pending/docsubmit.html with
appropriate attestations for the usages he asks to be supported.

(In reply to Seshadri N from comment #0)
> Extentions unicode U1CD0 series.

Not all of these characters are attested to be used with Tamil.

> Some such requests that I have come across in my FB and other groups:
> 
> 1. How can I include the signs like lines above the letters as shown in the
> picture. This is required to show the swaram i.e. high or low pitch of
> pronouncing the letter/word as in Sanskrit. This kind of lines are used in
> Sanskrit also.

The characters attested to be used with Tamil are 0951, 0952 and 1CDA and they
are already allotted ScriptExtensions for Tamil.


0951          ; Beng Deva Gran Gujr Guru Knda Latn Mlym Orya Shrd Taml Telu #
Mn       DEVANAGARI STRESS SIGN UDATTA
0952          ; Beng Deva Gran Gujr Guru Knda Latn Mlym Orya Taml Telu # Mn    
  DEVANAGARI STRESS SIGN ANUDATTA
1CDA          ; Deva Knda Mlym Taml Telu # Mn       VEDIC TONE DOUBLE SVARITA

> 2. I need to type musical notations in Tamil Using MSword processor. To
> indicate octave we put a dot on top or bottom of the letter. how to add  ?
> 
> --- My answer for above point 2: dot above = anuswara, dot below = nukta,
> Lohit Tamil does not contain nukta, but includes anuswara (U+0B82). ---

Nuktas and anusvaras form part of Indic syllabic structure. Musical notations
are outside syllable structure. Combining characters from the 03xx range should
be used instead.

Note that separately single- and double-dot nukta-s are attested for Tamil and
need to be added to Lohit Tamil:

http://www.unicode.org/L2/L2015/15256-tamil-nukta.pdf

Of these the double-dot nukta from Grantha is allotted SE for Tamil:

1133C         ; Gran Taml # Mn       GRANTHA SIGN NUKTA

and the single-dot nukta is in the pipeline to be encoded in the Grantha block
with Script=Inherited (which means it can be used with all scripts).

> U+0310 COMBINING CANDRABINDU  >>> replace with VEDIC TONE CANDRABINDU /
> anunasika U+0901, thats in Devanagari range, to be consistent with all other
> scrips.

In fact it would seem Unicode advises to use Grantha characters for Tamil
rather than Devanagari. See visarga matter below. Thus U+11301 Grantha
Candrabindu would be the appropriate character.

> Visarga U+0903 ( as separate and distinct, in addition to Tamil Visarga
> U+0B83 )

UTC advises to use U+11303 Grantha Sign Visarga:
11303         ; Gran Taml # Mc       GRANTHA SIGN VISARGA

> AVAGRAHA U+093D

I suppose U+1133D Grantha Sign Avagraha would be appropriate.

> CANDRABINDU VIRAMA U+A8F3

Already in SE:
A8F3          ; Deva Taml # Lo       DEVANAGARI SIGN CANDRABINDU VIRAMA

> NUKTA U+093C
> VEDIC TONE UDATTA / SVARITA U+0951
> VEDIC TONE ANUDATTA U+0952
> VEDIC TONE DOUBLE/Deerga SVARITA U+1CDA

See above.

> VEDIC TONE PRENKHA U+1CD2
> VEDIC TONE CANDRA U+1CF4

Please provide attestation as to where these are used with Tamil.

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