@MSGID: <AABk7Ht72-0AAAxK.A3.flnews@WStation5.stz-e.de>
eb8e7d77
@REPLY: 1@dont-email.me> eef3d769
@REPLYADDR Michael B?uerle
<michael.baeuerle@stz-e.de>
@REPLYTO 2:5075/128 Michael B?uerle
@CHRS: CP866 2
@RFC: 1 0
@RFC-Message-ID:
<AABk7Ht72-0AAAxK.A3.flnews@WStation5.stz-e.de>
@RFC-References: 1@dont-email.me>
@RFC-Reply-To: Michael B?uerle
<michael.baeuerle@gmx.net>
@TZUTC: 0200
@PID: flnews/1.2.1pre2 (for NetBSD)
@TID: FIDOGATE-5.12-ge4e8b94
Janis Papanagnou wrote:
> 
> I`m replacing in a *.tex file (e.g.) `\\Omega` character definitions.
> 
> In the Unicode tables I find a lot of different "Omegas`, but just
> incoherent character set definitions and with different renderings
> (depending on the output device some are taller, others are thiner).
> 
>   O (U+03A9) (Greek and Coptic sets; Range: 0370-03FF)
>   O (U+2126) ohm sign

Quoted from the Unicode 15 database (UnicodeData.txt):
<https://www.unicode.org/Public/15.0.0/ucd/>
| 
| [...]
| 03A9;GREEK CAPITAL LETTER OMEGA;Lu;0;L;;;;;N;;;;03C9;
| [...]
| 2126;OHM SIGN;Lu;0;L;03A9;;;;N;OHM;;;03C9;
                       ^^^^
The field with index 5 contains the decomposition mapping:
<https://www.unicode.org/reports/tr44/#UnicodeData.txt>
<https://www.unicode.org/reports/tr44/#Character_Decomposition_Mappings>
| 
| The prefixed tags supplied with a subset of the decomposition mappings
| generally indicate formatting information. Where no such tag is given,
| the mapping is canonical. [...]

U+2126 has a singleton decomposition to U+03A9 and therefore will not
survive normalization. Both are canonically equivalent.
--- flnews/1.2.1pre2 (for NetBSD)
 * Origin: usenet.network (2:5075/128)
SEEN-BY: 5001/100 5005/49 5015/255 5019/40 5020/715
848 1042 4441 12000
SEEN-BY: 5030/49 1081 5075/128
@PATH: 5075/128 5020/1042 4441