# Re: numeric properties of Nl characters in the UCD

From: Mark Davis (mark.davis@jtcsv.com)
Date: Thu Nov 27 2003 - 12:10:35 EST

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If you have feedback on changes that you would like to see made in the UCD, you
can propose it as outlined on http://www.unicode.org/review/, under Unicode
4.0.1.

Mark
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----- Original Message -----
From: "Arcane Jill" <arcanejill@ramonsky.com>
To: <unicode@unicode.org>
Sent: Wed, 2003 Nov 26 23:57
Subject: RE: numeric properties of Nl characters in the UCD

> ...which brings me back to my question (which no-one's answered yet).
> What do the properties "digit" versus "decimal digit" actually MEAN? Is
> it possible for someone to give a PRECISE definition. I mean, it seems
> pretty clear that "decimal digit" does NOT mean "radix ten digit"
> (otherwise circled digit 2 would be a "decimal digit", and it isn't). I
> can only assume that the INTENDED meaning of what is (erroneously?)
> called "decimal digit" is "a character which is permitted to play a part
> in a positional number system" - thus "2" is a decimal digit because it
> can form part of the legal number "123", but circled digit 2 is not
> because "1②3" is not a legal number. Am I even close?
>
> This being so, it is possible that the (misnamed) property "decimal
> digit" should also apply to Ewellic hex digits. They're not radix ten,
> but that's not what "decimal digit" means anyway. They ARE capable of
> being used in a positional number system.
>
> Of course, "1²3" is not a legal number either, despite the fact that
> superscript 2 DOES have the "decimal digit" property. Maybe the answer
> is that "²³" can be interpretted as superscript 23, but "②③" can't be
> interpretted as circled 23 ?
>
> I am not certain on any of this, and will admit to being confused. What
> I AM certain of is that I would like to see a formal and precise,
> unambiguous definition of the meanings of the "decimal digit", "digit"
> and "numeric" properties. If no such definition exsits, then I suggest
> that one is needed.
>
> Jill
>
>
> > -----Original Message-----
> > From: Doug Ewell [mailto:dewell@adelphia.net]
> > Sent: Thursday, November 27, 2003 7:18 AM
> > To: Unicode Mailing List
> > Cc: D. Starner
> > Subject: Re: numeric properties of Nl characters in the UCD
> >
> >
> > Note especially the "number" fields for the hex digits: they are
> > numeric, they are even digits, but they're not *decimal* digits.
>
>
>
>

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