CJK Unified Ideographs Extension C
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]
| CJK Unified Ideographs Extension C | |
|---|---|
| Range | U+2A700..U+2B73F (4,160 code points) |
| Plane | SIP |
| Scripts | Han |
| Assigned | 4,154 code points |
| Unused | 6 reserved code points |
| Unicode version history | |
| 5.2 (2009) | 4,149 (+4,149) |
| 14.0 (2021) | 4,153 (+4) |
| 15.0 (2022) | 4,154 (+1) |
| Unicode documentation | |
| Code chart ∣ Web page | |
| Note: [1][2] | |
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), "M49.19", 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), "CJK Unified Ideographs Extension C", 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), "M51.11g - M51.11j", 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), "IRG - Review of CJK-C Repertoire", 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), "M50.12", Unconfirmed minutes of WG 2 meeting 50, Frankfurt-am-Main, Germany; 2007-04-24/27 | ||||
| L2/07-225 | Moore, Lisa (2007-08-21), "B.3", 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), "Consensus 115-C21", 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), "Update to UTR #45 U-Source Ideographs requested", UTC Liaison Report from WG2 | |||||
| N4103 | "Resolution 58.05 and M58.06", 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), "M62.01d, M62.01i", 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), "M63.05", Unconfirmed minutes of WG 2 meeting 63 | ||||
| L2/15-242 | N4682 | West, Andrew; Fan, Ming (2015-10-16), Error Report for CJK Unified Ideographs Extensions C and E | ||||
| N4739 | "M64.06", 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), "10.4.8 and 10.4.9", 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] | |||||
| L2/22-259 | N2556R2 | Chan, Eiso; Collins, Lee; Việt, Ngô Trung (2022-10-20), IRGN2556R2 V-Source Glyph and Codes Updates [Affects U+2AB63, 2ACD8, and 2AF6F] | ||||
| L2/22-247 | Lunde, Ken (2022-11-01), "25) L2/22-258 and 26) L2/22-259", CJK & Unihan Group Recommendations for UTC #173 Meeting | |||||
| L2/22-241 | Constable, Peter (2022-11-09), "E.1 25) L2/22-258 and E.1 26) L2/22-259", 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), "L2/20-210: Request to dis-unify U+722B", Unihan Ad Hoc Recommendations for UTC #165 Meeting | |||||
| L2/20-237 | Moore, Lisa (2020-10-27), "Consensus 165-C10", 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), "L2/20-291: Request for consideration to disunify U+3B3F (IRG N2443)", CJK & Unihan Group Recommendations for UTC #166 Meeting | |||||
| L2/21-009 | Moore, Lisa (2021-01-27), "C.1 — L2/20-291: Request for consideration to disunify U+3B3F (IRG N2443)", 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), "L2/21-044: UNC Proposal for One G-Source Ideograph (IRG N2446)", CJK & Unihan Group Recommendations for UTC #166 Meeting | |||||
| L2/21-009 | Moore, Lisa (2021-01-27), "C.1 — L2/21-044 UNC Proposal for One G Source Ideograph", 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), "L2/21-046: Disunification of U+2F83A (IRG N2447)", CJK & Unihan Group Recommendations for UTC #167 Meeting | |||||
| L2/21-066 | Moore, Lisa (2021-05-05), "Consensus 167-C3", 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), "18", CJK & Unihan Group Recommendations for UTC #171 Meeting | |||||
| L2/22-061 | Constable, Peter (2022-07-27), "E.1 Section 18", Approved Minutes of UTC Meeting 171 | |||||
| ||||||
References
- "Unicode character database". The Unicode Standard. Retrieved 2023-07-26.
- "Enumerated Versions of The Unicode Standard". The Unicode Standard. Retrieved 2023-07-26.
- "18.1: Han (§ Blocks Containing Han Ideographs)" (PDF). The Unicode Standard: Core Specification. Version 15.0. Unicode Consortium. pp. 741–744. 2022. ISBN 978-1-936213-32-0.
- "Ideographic Variation Database". Unicode Consortium.
- "UTS #37, Unicode Ideographic Variation Database". Unicode Consortium.
- IRG Working Set 2021
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