CJK Unified Ideographs Extension C

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Short description: Unicode character block
Short description: Unicode character block
CJK Unified Ideographs Extension C
RangeU+2A700..U+2B73F
(4,160 code points)
PlaneSIP
ScriptsHan
Assigned4,149 code points
Unused11 reserved code points
Unicode version history
5.24,149 (+4,149)
Note: [1][2]

CJK Unified Ideographs Extension C is a Unicode block containing rare and historic CJK ideographs for Chinese, Japanese, Korean, and Vietnamese submitted to the Ideographic Research Group between 2002 and 2006, plus five "urgently needed" characters added in Unicode versions 14.0 and 15.0, some of which had previously been mistakenly unified with other characters.[3]

The block has dozens of ideographic variation sequences registered in the Unicode Ideographic Variation Database (IVD).[4][5] These sequences specify the desired glyph variant for a given Unicode character.

Note that the Katakana ligature 𪜈 (U+2A708) has been erroneously encoded in this block as a Han character.[6]

Block

History

The following Unicode-related documents record the purpose and process of defining specific characters in the CJK Unified Ideographs Extension C block:

Version Final code points[lower-alpha 1] Count L2 ID WG2 ID IRG ID Document
5.2 U+2A700..2B734 4,149 L2/02-462 N2563 Suignard, Michel (2002-12-11), CJK Compatibility Ideograph source reference fixes 
L2/06-390 N3134 N1226 Proposal to encode CJK Unified Ideographs Extension C1 in SIP, 2006-08-27 
N3153 (pdf, doc) Umamaheswaran, V. S. (2007-02-16), Unconfirmed minutes of WG 2 meeting 49 AIST, Akihabara, Tokyo, Japan; 2006-09-25/29 
L2/06-363 Jenkins, John (2006-11-01), UTC Extension C1 Characters 
L2/06-351 Whistler, Ken (2006-11-06), WG2 Consent Docket 
L2/06-390.1 N3134.1 Proposal to encode CJK Unified Ideographs Extension C1 in SIP, Data files part 1, 2006-11-13 
L2/06-390.2 N3134.2 Proposal to encode CJK Unified Ideographs Extension C1 in SIP, Data files part 2, 2006-11-13 
L2/06-390.3 N3134.3 Proposal to encode CJK Unified Ideographs Extension C1 in SIP, Data files part 3, 2006-11-13 
N3134.4 Proposal to encode CJK Unified Ideographs Extension C1 in SIP, Attachment B (detailed source information for every character), 2006-11-13 
L2/06-404 N3190 Lu, Qin (2006-12-21), CJK Ext. C Multicolumn Code Table 
L2/07-125 N3244 Review of CJK-C Repertoire, 2007-04-24 
N3267 Summary response to comments on CJK Ext. C in pDam4, 2007-04-25 
N3353 (pdf, doc) Umamaheswaran, V. S. (2007-10-10), Unconfirmed minutes of WG 2 meeting 51 Hanzhou, China; 2007-04-24/27 
L2/07-160 Jenkins, John (2007-05-10), U-source Correction for Extension C 
L2/07-118R2 Moore, Lisa (2007-05-23), UTC #111 Minutes 
L2/07-244 N3281, N3281-A, N3281-B N1331 Lu, Qin (2007-07-16), Request for Glyph Change in CJK C PDAM5 
L2/07-245 N3280, N3280-A, N3280-B N1330 Lu, Qin (2007-07-16), Request for Removal of Characters in CJK C PDAM5 
L2/07-268 N3253 (pdf, doc) Umamaheswaran, V. S. (2007-07-26), Unconfirmed minutes of WG 2 meeting 50, Frankfurt-am-Main, Germany; 2007-04-24/27 
L2/07-225 Moore, Lisa (2007-08-21), UTC #112 Minutes 
N3279 (Part 1, Part 2, xls) CJK Extension C code charts, spreadsheet, chart part 1, chart part 2, 2007-10-22 
L2/08-227 Suignard, Michel (2008-05-15), CJK Extension C Repertoire 
L2/08-310 Cook, Richard (2008-08-12), Fonts for Extension B and C and IRG 
L2/08-161R2 Moore, Lisa (2008-11-05), UTC #115 Minutes, "Approve 4,149 CJK ideographs in Extension C at codepoints U+2A700..U+2B734 for encoding in a future version of the standard." 
L2/10-195 Suignard, Michel (2010-05-10), CJK Charts 
L2/11-243 N4111 Sources for Orphaned CJK Ideographs, 2011-06-14 
L2/11-254 Constable, Peter (2011-06-20), UTC Liaison Report from WG2 
N4103 Unconfirmed minutes of WG 2 meeting 58, 2012-01-03 
N4558 Request of Changing One CJK_C Source and Glyph [U+2A92F], 2014-02-25 
N4553 (pdf, doc) Umamaheswaran, V. S. (2014-09-16), Minutes of WG 2 meeting 62 Adobe, San Jose, CA, USA 
L2/14-260 N4621 Suignard, Michel (2014-10-23), CJK chart and source references update 
L2/16-052 N4603 (pdf, doc) Umamaheswaran, V. S. (2015-09-01), Unconfirmed minutes of WG 2 meeting 63 
N4739 Unconfirmed minutes of WG 2 meeting 64, 2016-08-31 
L2/17-180 N2202 Chan, Eiso (2017-06-02), Request for consideration to add kIRG_GSource values to thirteen ideographs and change two G-source glyphs for the Table of General Standard Chinese Characters [Affects U+24A7D, U+25ED7, U+2677C, U+26C21, U+2A8FB, U+2A917, and U+2AA30] 
N4987 Proposal on China's Horizontal Extension for 14 CJK Ideographs [Affects U+2A917 and 2AA30], 2018-06-13 
N4988 Proposal on Updating 11 G glyphs of CJK Unified Ideographs to ISO/IEC 10646 [Affects U+2A8FB], 2018-06-13 
N5020 (pdf, doc) Umamaheswaran, V. S. (2019-01-11), Unconfirmed minutes of WG 2 meeting 67 
L2/19-242 N5094 N2370 Chan, Eiso (2019-02-14), 20 questionable V4-Source characters in Ext. C and Ext. E [Affects U+2B1E5] 
N5086 N2379 Proposal of China's horizontal extension for technical used characters [Affects U+2AED5, U+2AEF3, U+2AF76 and U+2B09F], 2019-05-10 
L2/19-237 N5068 Editorial Report on Miscellaneous Issues (meeting IRG#52) [Affects U+2B1C3 and U+2B1E5], 2019-05-17 
L2/19-241 N5083 N2391 Errata report for WG2 submission_TCA [Affects U+2B1C3], 2019-05-31 
L2/22-258 Shin, SangHyun; Kim, Kyongsok (2022-10-14), Changing glyphs and IDSs of 97 KR Hanja chars containing '叱 (U+53F1)' [Affects U+2A741, 2B173, and 2B490] 
L2/22-241 Constable, Peter (2022-11-09), Approved Minutes of UTC Meeting 173 
14.0 U+2B735 1 L2/20-210 Chan, Eiso; Collins, Lee; Nhàn, Ngô Thanh (2020-06-10), Request to dis-unify U+722B 
L2/20-235 Lunde, Ken (2020-09-22), Unihan Ad Hoc Recommendations for UTC #165 Meeting 
L2/20-237 Moore, Lisa (2020-10-27), UTC #165 Minutes 
U+2B736 1 L2/20-291 N2443 Chan, Eiso (2020-12-19), Request for consideration to disunify U+3B3F 
L2/21-015 Lunde, Ken (2021-01-15), CJK & Unihan Group Recommendations for UTC #166 Meeting 
L2/21-009 Moore, Lisa (2021-01-27), UTC #166 Minutes 
U+2B737 1 L2/21-044 N2446 UNC Proposal for One G Source Ideograph, 2021-01-07 
L2/21-015 Lunde, Ken (2021-01-15), CJK & Unihan Group Recommendations for UTC #166 Meeting 
L2/21-009 Moore, Lisa (2021-01-27), UTC #166 Minutes 
U+2B738 1 L2/21-046 N2447 Jiang, Kushim (2021-01-15), Disunification of U+2F83A 
L2/21-072 Lunde, Ken (2021-04-26), CJK & Unihan Group Recommendations for UTC #167 Meeting 
L2/21-066 Moore, Lisa (2021-05-05), UTC #167 Minutes 
15.0 U+2B739 1 L2/22-042 N2543 Lunde, Ken (2022-02-18), Proposal to disunify U+5F50 into three separate ideographs-redux 
L2/22-076 N2538R Submission of One Character for Macao Supplementary Character Set (MSCS), 2022-02-28 
L2/22-091 Chan, Eiso; Collins, Lee; Việt, Ngô Trung (2022-03-10), Vietnam Response to IRGN2509 
L2/22-067 Lunde, Ken (2022-04-16), CJK & Unihan Group Recommendations for UTC #171 Meeting 
L2/22-061 Constable, Peter (2022-07-27), Approved Minutes of UTC Meeting 171 
  1. ↑ Proposed code points and characters names may differ from final code points and names

References

  1. ↑ "Unicode character database". The Unicode Standard. https://www.unicode.org/ucd/. Retrieved 2023-07-26. 
  2. ↑ "Enumerated Versions of The Unicode Standard". The Unicode Standard. https://www.unicode.org/versions/enumeratedversions.html. Retrieved 2023-07-26. 
  3. ↑ "18.1: Han (§ Blocks Containing Han Ideographs)", The Unicode Standard: Core Specification, Version 15.0: pp. 741–744, 2022, ISBN 978-1-936213-32-0, https://www.unicode.org/versions/Unicode15.0.0/ch18.pdf#page=6 
  4. ↑ "Ideographic Variation Database". Unicode Consortium. https://www.unicode.org/ivd/. 
  5. ↑ "UTS #37, Unicode Ideographic Variation Database". Unicode Consortium. https://www.unicode.org/reports/tr37/. 
  6. ↑ IRG Working Set 2021



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