Re: Too narrowly defined: DIVISION SIGN & COLON

From: Jukka K. Korpela <>
Date: Thu, 12 Jul 2012 20:24:07 +0300

2012-07-12 19:31, Asmus Freytag wrote:

> I don't see any problem in amending the proposed annotations
> U+003A COLON
> * also used to denote division or scale, for that usage 2236 : RATIO is
> preferred in mathematical use
> U+2236 RATIO
> * Used in preference to 003A : to denote division or scale in
> mathematical use

I see a big problem here: why would the Unicode Standard take a position
on mathematical use in a manner that strongly conflicts with the ISO and
IEC standard on mathematical notations? The ISO 80000-2 standard (also
issued as IEC standard) designates U+003A as a character used for ratios.

What I have proposed, regarding COLON, is just

* also used to denote division or ratio

I don’t think RATIO needs an annotation, as the name reflects the
intended usage. But if an annotation is added, it could be e.g.

* used to denote ratio (e.g. in a scale), as an alternative to 003A COLON

Received on Thu Jul 12 2012 - 12:25:09 CDT

This archive was generated by hypermail 2.2.0 : Thu Jul 12 2012 - 12:25:09 CDT