CJK stroke order data: kRSUnicode v. kRSKangXi

Adam Nohejl adam at nohejl.name
Sun Mar 9 07:39:20 CDT 2014

Hello again,

I would be really grateful for any reply or at least pointers to relevant information about this topic (stroke-order data in Unihan, see my previous message below).

Or is there any other appropriate place to discuss this?

Thank you,


On 2014/02/28, at 19:56, Adam Nohejl <adam at nohejl.name> wrote:
> Hello,
> I am comparing radical data for CJK characters from different sources, including the Unihan database. According to the Unihan documentation* the kRSUnicode radical should correspond to kRSKangXi radical, which in turn should be based on the Kang Xi dictionary.
> Is there any explanation for the following discrepancies? Did I miss any other rules or reasoning behind the content of these two fields?
> Examples of the discrepancies:
> (1) A very common character for "most, maximum".
> U+6700	kRSKangXi	73.8
> U+6700	kRSUnicode	13.10
> (2) A funny character for autumn containing the turtle component.
> U+9F9D	kRSKangXi	115.16
> U+9F9D	kRSKanWa	115.16
> U+9F9D	kRSUnicode	213.5
> There are also characters that actually are not included in the Kang Xi dictionary**, but the Unihan data contain both a purported Kang Xi radical and in addition to that a _different_ Unicode radical.
> (3) The simplified turtle character (commonly assigned to the traditional radical #213):
> U+4E80	kRSKangXi	213.0
> U+4E80	kRSUnicode	5.10
> (4) Character with the radical #72/73 at the top, i.e. IMHO an arbitrary decision, but unexpectedly the fields differ:
> U+66FB	kRSKangXi	72.7
> U+66FB	kRSUnicode	73.7
> - - -
> [*] <http://www.unicode.org/reports/tr38/tr38-8.html>: "Property: kRSUnicode // Description: (...) The first value is intended to reflect the same radical as the kRSKangXi field and the stroke count of the glyph used to print the character within the Unicode Standard."
> [**] The two characters are missing from the '89 edition of Kang Xi (which should be the same as used for Unihan) according to search on this site: <http://ctext.org/dictionary.pl>

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