From: Mark Davis ☕ (firstname.lastname@example.org)
Date: Mon Nov 29 2010 - 16:14:23 CST
The numeric types, including Han, are supplied in:
*— Il meglio è l’inimico del bene —*
On Mon, Nov 29, 2010 at 13:17, M.-A. Lemburg <email@example.com> wrote:
> in Python we have come across a possible inconsistency with respect
> to the way code points are classified as having numeric properties in
> the Unihan database.
> I'd like to get information on whether this is intentional or
> just a side-effect of the Unihan database using a different
> approach to number type classification than the UCD.
> In the UCD, the number type is defined as:
> that is there are decimals (= decimal digits) which can be used to parse
> decimal radix digits; digits which represent decimal digits, but require
> special handling (e.g. superscript digits) and numeric types which can
> mean anything from single digits, to fractions and multi-digit numbers.
> In Unihan, the number code points are defined using:
> that is all code points with numeric representations are grouped
> in the numeric type category and there is an additional separation
> by accounting use, primary numeric and other numeric use.
> The typically used Chinese and Japanese code points for
> numeric digits fall into the Unihan range:
> Question: Why don't these code points have the "Nd" category ?
> See this list for the 5.2.0 group of Nd code points:
> Related to this, it is also unclear what to use as official zero
> for these number systems (U+3007 is often recommended).
> Finally, unlike many of the other digit code point sequences
> in the UCD, there doesn't appear to be such a sequence for
> Chinese decimal digits (apart from the incomplete vertical variant
> U+3021 - U+3029, which lacks the zero).
> Marc-Andre Lemburg
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