<p>Unicode appears to define the composed forms of some radicals (e.g. 725C 牜or 2EA9 ⺩), but far from all (e.g. the left-half version of 6728 木). Yet there are texts (e.g. figure 18.7 in chapter 18 of the description of the Unicode standard (<a href="http://www.unicode.org/versions/Unicode12.0.0/ch18.pdf" rel="nofollow noreferrer">http://www.unicode.org/versions/Unicode12.0.0/ch18.pdf</a>) ) which contains that character. Is there a collection of the encodings of the composed radical forms? </p>

CC BY-SA 4.0
2019-04-29T01:04:29.097Z
牜 and ⺩ are not defined by Unicode as *radicals*. Unicode defines radicals in these two documents: http://unicode.org/charts/PDF/U2F00.pdf and http://unicode.org/charts/PDF/U2E80.pdf - 牜 and ⺩ are only considered by Unicode as *combining forms*. I don't know why the combining form of 木 is not defined, though.
dROOOze
CC BY-SA 4.0
2019-04-29T15:22:25.910Z
@droooze I think the left side form of Tree was not considered different enough to warrant encoding.
Tom Gewecke
CC BY-SA 4.0
2019-04-29T15:24:22.093Z
@TomGewecke I thought of that possibility, and found 訁. I don't think 訁 warrants a separate encoding from 言 if it's a similarity issue.
dROOOze
CC BY-SA 4.0
2019-04-29T16:17:33.613Z
@droooze Yes, you're right.  Hard to know sometimes why some han characters got  included and some not.  Compatibility with legacy encodings and even plain mistakes can be factors.
Tom Gewecke
CC BY-SA 4.0
2019-05-03T09:06:21.673Z
Thanks for your comments, but again, in the reference above (figure 18.7 of Chapter 18 in http://www.unicode.org/versions/Unicode12.0.0/ch18.pdf) the left-side form of tree does appear. So is it a picture drawing there and not an encoded character?
jr74
<characters>
Composed forms of radicals in unicode
# Composed forms of radicals in unicode

(Asked by: username_0 on 2019-04-28)

Unicode appears to define the composed forms of some radicals (e.g. 725C 牜or 2EA9 ⺩), but far from all (e.g. the left-half version of 6728 木). Yet there are texts (e.g. figure 18.7 in chapter 18 of the description of the Unicode standard (<http://www.unicode.org/versions/Unicode12.0.0/ch18.pdf>) ) which contains that character. Is there a collection of the encodings of the composed radical forms?

**Tags:** characters

> **Comments:**
> **username_1**: 牜 and ⺩ are not defined by Unicode as *radicals*. Unicode defines radicals in these two documents: http://unicode.org/charts/PDF/U2F00.pdf and http://unicode.org/charts/PDF/U2E80.pdf - 牜 and ⺩ are only considered by Unicode as *combining forms*. I don't know why the combining form of 木 is not defined, though.  
> **username_2**: @username_1 I think the left side form of Tree was not considered different enough to warrant encoding.  
> **username_1**: @username_2 I thought of that possibility, and found 訁. I don't think 訁 warrants a separate encoding from 言 if it's a similarity issue.  
> **username_2**: @username_1 Yes, you're right.  Hard to know sometimes why some han characters got  included and some not.  Compatibility with legacy encodings and even plain mistakes can be factors.  
> **username_0**: Thanks for your comments, but again, in the reference above (figure 18.7 of Chapter 18 in http://www.unicode.org/versions/Unicode12.0.0/ch18.pdf) the left-side form of tree does appear. So is it a picture drawing there and not an encoded character?  

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## 0 answers

