CJK Unified Ideographs Extension A

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Short description: Unicode character block
CJK Unified Ideographs Extension A
RangeU+3400..U+4DBF
(6,592 code points)
PlaneBMP
ScriptsHan
Assigned6,592 code points
Unused0 reserved code points
Unicode version history
3.06,582 (+6,582)
13.06,592 (+10)
Note: [1][2]
Range used for Hangul syllables prior to Unicode 2.0 (see Hangul (obsolete Unicode block)).

CJK Unified Ideographs Extension-A is a Unicode block containing rare Han ideographs submitted to the Ideographic Research Group between 1992 and 1998, plus ten ideographs added in Unicode 13.0 which had previously been mistakenly unified with others.[3]

The block has dozens of variation sequences defined for standardized variants.[4]

It also has thousands of ideographic variation sequences registered in the Unicode Ideographic Variation Database (IVD).[5][6] These sequences specify the desired glyph variant for a given Unicode character.

Block

History

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

Version Final code points[lower-alpha 1] Count L2 ID WG2 ID IRG ID Document
3.0 U+3400..4DB5 6,582 N1423 N364 Proposal Summary Form: CJK Unified Ideographs Extension A, 1996-08-01 
N1424 N382 CJK Unified Ideograph Extension A Version 1.1, 1996-08-01 
N1425 N378 Draft Text of General Description for Extension A, 1996-08-01 
N1426 N379 Draft Text of CJK Annex for Extension A, 1996-08-01 
N1455 Lu, Chin (1996-08-06), More Evidence on CJK Extension A 
N1439 Korea's comments on IRG Proposal, 1996-08-12 
N1449 Wang, Xiaoming (1996-08-12), The Great Chinese Word Dictionary with CJK Extensions 
N1453 Ksar, Mike; Umamaheswaran, V. S. (1996-12-06), WG 2 Minutes - Quebec Meeting 31 
N1479 Ksar, Mike (1997-01-10), Results of SC2 questionnaire on allocation of 6585 Han characters in BMP 
N1487 IRG position concerning Japanese comments on extension A, 1997-01-15 
L2/97-030 N1503 (pdf, doc) Umamaheswaran, V. S.; Ksar, Mike (1997-04-01), Unconfirmed Minutes of WG 2 Meeting #32, Singapore; 1997-01-20--24 
L2/97-254R Orita, Tetsuji (1997-11-20), Comment on CJK Unified Ideograph Extension-A by IRG 
L2/98-039 Aliprand, Joan; Winkler, Arnold (1998-02-24), Preliminary Minutes - UTC #74 & L2 #171, Mountain View, CA - December 5, 1997 
L2/98-096 N1723 CJK Unified Ideographs Extension A, High Quality Printing, Version 2.0, 1998-03-02 
L2/98-103 N1733 Text for FPDAM #17 - CJK Unified Ideographs Extension A, 1998-03-20 
L2/98-171 N1776 Text for PDAM registration and FPDAM ballot for ISO 10646-1 Amendment 17 - CJK Unified Ideographs Extension A, 1998-05-01 
L2/98-170 Winkler, Arnold (1998-05-11), PDAM registration and FPDAM ballot for ISO 10646-1 Amendment 17 - CJK Extension A 
L2/98-286 N1703 Umamaheswaran, V. S.; Ksar, Mike (1998-07-02), Unconfirmed Meeting Minutes, WG 2 Meeting #34, Redmond, WA, USA; 1998-03-16--20 
L2/98-334 Revised Text of ISO/IEC 10646-1/FPDAM 17, AMENDMENT 17: CJK Unified Ideograph Extension A, 1998-11-02 
L2/98-347 Disposition of comments report on SC2 N3090, ISO 10646 Amd. 17: CJK unified ideograph extension A, 1998-11-02 
L2/99-010 N1903 (pdf, html, doc) Umamaheswaran, V. S. (1998-12-30), Minutes of WG 2 meeting 35, London, U.K.; 1998-09-21--25 
L2/99-023 N1943 Paterson, Bruce; Sato, T. K. (1999-01-08), Revision of 10646-1 Annex T for CJK Unified Ideographs Extension A (Draft) 
L2/99-156 Table of replies on ISO/IEC 10646-1/FDAM 17 - CJK Unified Ideographs Extension A, 1999-05-17 
L2/99-232 N2003 Umamaheswaran, V. S. (1999-08-03), Minutes of WG 2 meeting 36, Fukuoka, Japan, 1999-03-09--15 
L2/99-287 Notice of publication for ISO/IEC 10646-1/Amd. 17, CJK Unified Ideographs Extension A, 1999-08-19 
L2/99-335 N2109 N674 Zhang, Zhoucai (1999-09-03), SuperCJK, version 9.0 with Kangxi and HYD data 
L2/03-287 Cook, Richard (2003-08-24), 16 UniHan.txt errors 
L2/03-301 Cook, Richard (2003-08-27), 24 more UniHan.txt errors 
L2/03-399 Fok, Anthony (2003-10-13), Unihan reported errors / changes re kHKSCS entries 
L2/03-367 N2667 Suignard, Michel; Muller, Eric; Jenkins, John (2003-10-22), CJK Ideograph source references corrections 
L2/03-398 Nguyen, D. (2003-10-29), Unihan reported errors / changes re kCowles 
L2/03-453 Minutes of the Editorial Group Ad Hoc Discussion, 2003-12-17 
L2/04-208 N2774R N1064 Proposal to add 6 KP source references to existing CJK Unified Ideographs, 2004-05-25 
N3353 (pdf, doc) Umamaheswaran, V. S. (2007-10-10), Unconfirmed minutes of WG 2 meeting 51 Hanzhou, China; 2007-04-24/27 
L2/07-208 N3285 Proposal to replace 11 KP source references to existing ISO/IEC 10646:2003, 2007-07-18 
L2/13-016 Suignard, Michel (2013-01-24), CJK Ext-A fix 
L2/13-011 Moore, Lisa (2013-02-04), UTC #134 Minutes 
N4403 (pdf, doc) Umamaheswaran, V. S. (2014-01-28), Unconfirmed minutes of WG 2 meeting 61, Holiday Inn, Vilnius, Lithuania; 2013-06-10/14 
L2/14-149 N4544 Suignard, Michel (2014-07-18), CJK ideographs glyphs representation and sources references 
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 
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+37C3 and 3FE0] 
N4974 N2301 Request of TCA's Horizontal Extension for Chemical Terminology [Affects U+44EC], 2018-06-12 
N4987 Proposal on China's Horizontal Extension for 14 CJK Ideographs [Affects U+37C3 and 3FE0], 2018-06-13 
N4988 Proposal on Updating 11 G glyphs of CJK Unified Ideographs to ISO/IEC 10646 [Affects U+3B9D, 3CFD and 4A76], 2018-06-13 
N5016 N2349 Shin, Sanghyun; Cho, Sungduk; Pyo, Seungju; Kim, Kyongsok (2018-12-13), Request to move character K6-1022 in Horizontal Extension of KS X 1027-5 from U+3EAC to U+248F2 
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+440B] 
N2369 Chan, Eiso (2019-05-06), Feedback on IRGN2369 [Affects U+38C7 and 46E9] 
N5086 N2379 Proposal of China's horizontal extension for technical used characters [Affects U+3472, 3DB8 and 3FE0], 2019-05-10 
L2/19-237 N5068 Editorial Report on Miscellaneous Issues (meeting IRG#52) [Affects U+3EAC and 440B], 2019-05-17 
L2/19-241 N5083 N2391 Errata report for WG2 submission_TCA [Affects U+440B], 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+357E, 358B–358E, 3599–359D, 35AF, 35B0, 35B2, 35B3, 35DF–35E1, 35EF, 360F, and 3612] 
L2/22-247 Lunde, Ken (2022-11-01), CJK & Unihan Group Recommendations for UTC #173 Meeting 
L2/22-241 Constable, Peter (2022-11-09), Approved Minutes of UTC Meeting 173 
L2/23-011 Lunde, Ken (2023-01-11), CJK & Unihan Group Recommendations for UTC #174 Meeting 
L2/23-005 Constable, Peter (2023-02-01), UTC #174 Minutes 
13.0 U+4DB6..4DBF 10 L2/19-242 N5094 N2370 Chan, Eiso (2019-02-14), 20 questionable V4-Source characters in Ext. C and Ext. E [Affects U+4DB6] 
L2/19-239 N5080 N2338 TCA's feedback to IRG N2338 [Affects U+4DB7, 4DB9, 4DBE and 4DBF], 2019-05-14 
L2/19-240 N5081 N2337 Disunification of U+2F83B/U+5406 [Affects U+4DB8], 2019-05-14 
L2/19-241 N5083 N2391 Errata report for WG2 submission_TCA [Affects U+4DBA, 4DBB, 4DBC and 4DBD], 2019-05-31 
N5122 Unconfirmed minutes of WG 2 meeting 68, 2019-12-31 
L2/19-270 Moore, Lisa (2019-10-07), UTC #160 Minutes 
  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. ↑ "Unicode Character Database: Standardized Variation Sequences". The Unicode Consortium. https://www.unicode.org/Public/UNIDATA/StandardizedVariants.txt. 
  5. ↑ "Ideographic Variation Database". Unicode Consortium. https://www.unicode.org/ivd/. 
  6. ↑ "UTS #37, Unicode Ideographic Variation Database". Unicode Consortium. https://www.unicode.org/reports/tr37/. 



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