From: Phillips, Addison (addison@amazon.com)
Date: Tue Jun 02 2009 - 09:29:03 CDT
Hello Torsten,
The Roman numerals encoded in Unicode, with the exception of certain, unique, archaic forms (such as U+2180), are compatibility characters: they exist as separate characters for compatibility with non-Unicode/legacy character encodings, fonts, or other sources. See Section 2.3 of Unicode [1]. They have compatibility mappings to plain Latin letters. For example, U+2161 (the "Ⅱ" character) maps to two uppercase letters "I" (U+0049).
My understanding is that the Greek Milesian numerals don't have such a compatibility issue and thus are not separately encoded.
Regards,
Addison
[1] http://www.unicode.org/versions/Unicode5.0.0/ch02.pdf
Addison Phillips
Globalization Architect -- Lab126
Internationalization is not a feature.
It is an architecture.
> -----Original Message-----
> From: unicode-bounce@unicode.org [mailto:unicode-bounce@unicode.org]
> On Behalf Of Torsten Schassan
> Sent: Tuesday, June 02, 2009 4:02 AM
> To: unicode@unicode.org
> Subject: Greek Milesian numerals
>
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> Hi,
>
> while Roman numerals are provided as separate characters (2160-217F)
> Greek Milesian numerals, using letters of the alphabet, are not. Is
> there a reason or isn't it true at all and only I haven't found the
> characters?
>
> Best, Torsten
>
> - --
> Torsten Schassan
> Herzog August Bibliothek, Postfach 1364, D-38299 Wolfenbuettel
> Tel.: +49-5331-808-130, schassan {at} hab.de
> http://www.hab.de;
> http://www.hab.de/forschung/projekte/weiss64.htm
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