Updating TW glyph shape to CNS11643 Amendment 1

[NightFurySL2001]

There is a recent update for CNS11643 as shown on the CNS site (https://www.cnsonline.com.tw/?node=detail&generalno=11643&locale=zh_TW). The main changes in this amendment, apart from newly added glyphs, is 35 glyph changes and 1 new glyph addition to CNS Plane 1 and 2. This is also reflected in the IRGN2586 document

Some of the changes are already implemented in Source Han as it affects cross-regional communication (e.g. U+5DD5 巕 in #169, 嬔/嬔 and 礡/礴 pair) or doesn't match the rest of the characters (e.g. 踴、謄、璽). Others however need to be corrected in accordance to the original Regular script font sample (國字標準字體楷書母稿).

Also noted is a few of the glyph updates doesn't seem to change anything significant, such as 罕滘 (top 儿 lightly touch the roof 冖, separated in Sans)、承 (right side cross out)、汩 (made wider)、檶 (structure change)、迗 (stroke touching). The rest will need either glyph editing or remapping. A few glyphs can be removed completely while others are added. The full document can be viewed on the CNS site by searching for "11643" and click on the "補充增修及勘誤表"; the PDF is also attached below the image.

CNS11643-20230420Corri.pdf

I believe the TW glyph for 承 can be totally removed and map to CN in Sans and JP in Serif. HK standard does not specify this is a significant difference and an exception could be considered under this rule of insignificant differences in Reference Glyphs for Chinese Computer Systems in Hong Kong.

Also see #340 for 掰 (HK).

[Marcus98T]

A small comment: I wonder if Adobe was already aware of the CNS amendment since it was published on 20 April 2023, and it's almost four months between the published date and the date of this issue. Regardless, we were not aware of such changes until this writing and I have suggested some wrong things before then. I have amended some of my issues as a result.

[NightFurySL2001]

Action list for doing CNS11643 Amendment 1:

	Char	Modification	Action	Related info
1	罕	Fix 儿 to touch	Modify TW glyph	See also item 19
2	承	Right component cross over	Remove TW, remap TW/HK to CN	Ignorable difference in HK?
3	新	2nd horizontal stroke shorter than 3rd horizontal stroke	Modify TW glyph
4	踴	Hook at 勇	No action	Using HK
5	謄	誊 start at 2nd horizontal stroke	No action	Using CN, see https://github.com/adobe-fonts/source-han-serif/issues/39#issuecomment-297603355
6	璽	Hook at 爾	No action	Using JP
7	櫬	See 新	Modify TW glyph	See item 3
8	襯	See 新	Modify TW glyph	See item 3
9	旲	Change 大 to throw stroke	Remove TW, remap to CN
10	汩	Flatter 曰	Modify TW glyph?
11	迗	Separate dot stroke on 天	Modify TW glyph/No action?
12	枲	Separate 口 and 木	Modify TW glyph
13	奊	Change 大 to dot stroke	Add TW glyph
14	埜	Change 林 to dot stroke	Remap TW to HK	See also item 20
15	掰	Change 分 to dot stroke	Modify TW glyph, map HK to new TW	See issue #340
16	椕	Change 分 to dot stroke	Remove TW, remap TW to HK	See also item 15
17	萒	Change bottom 兄 to 允	Remove TW, remap TW to HK	Double check HK glyph to match CN aesthetics?
18	楶	Change 欠 to throw stroke	Modify TW glyph
19	滘	Fix 儿 to touch	Modify TW glyph	See also item 1
20	榃	Change 林 to dot stroke	Remap TW to HK	See also item 14
21	葖	Change 大 to throw stroke	Modify TW glyph, add current TW as HK	Double check with HK?
22	獡	Change bottom right	Remove TW, remap TW to CN	May use current TW for U+2486F
23	嬔	Fix Big5 bug, change 免 to 兔	No action	Corrected
24	瑿	Change 又 to throw stroke	Modify TW glyph, add current TW as HK	Double check with HK?
25	麇	Change 禾	Modify TW glyph, add current TW as HK	Double check with HK?
26	嬮	Change structure	Modify TW glyph	Also need to fix 犬 dot stroke
27	儭	See 新	Modify TW glyph	See item 3
28	檶	Change structure	No action
29	齌	Change 火 to dot stroke	No action	Corrected by accident
30	嚫	See 新	Modify TW glyph	See item 3
31	瀙	See 新	Modify TW glyph	See item 3
32	礡	Fix Big5 bug	No action	Corrected
33	鷍	Change 木	Add TW glyph
34	巕	Fix Big5 bug, change top from 艹 to 䒑	Modify TW glyph	See issue #169 and #369, also need to fix 女
35	鱍	Change 又 to dot stroke	No action	Using CN
36	礴	Fix Big5 bug	No action	Corrected

Full image: (typo for 嚫)

[NightFurySL2001]

For 罕 and 滘, I believe that it should be edited since 穴 have them connected. It seems that Sinotype were well aware of the separation and carried it over into the font, with other similar component having it conencted. Also, it makes it consistent with the JP design which is good too.

However it is noted that 罙 is all disconneced in TW and only 探 is disconnected in JP. This is an incosistency that might be modified by CNS in the future.