CJK Compatibility Ideographs

CJK Compatibility Ideographs is a Unicode block created to contain Han characters that were encoded in multiple locations in other established character encodings, in addition to their CJK Unified Ideographs assignments, in order to retain round-trip compatibility between Unicode and those encodings. Such encodings include the South Korean KS X 1001:1998 (U+F900U+FA0B, 268 characters), Taiwanese Big5 (U+FA0CU+FA0D, 2 characters), Japanese IBM 32 (CP932 variant; U+FA0EU+FA2D, 32 characters), South Korean KS X 1001:2004 (U+FA2EU+FA2F, 2 character), Japanese JIS X 0213 (U+FA30U+FA6A, 59 characters), Japanese ARIB STD-B24 (U+FA6BU+FA6D, 3 characters) and the North Korean KPS 10721-2000 (U+FA70U+FAD9, 106 characters) source standards.

CJK Compatibility Ideographs
RangeU+F900..U+FAFF
(512 code points)
PlaneBMP
ScriptsHan
Assigned472 code points
Unused40 reserved code points
Source standardsKS X 1001:1998
Big5
IBM 32
KS X 1001:2004
JIS X 0213
ARIB STD-B24
KPS 10721-2000
Unicode version history
1.0.1302 (+302)
3.2361 (+59)
4.1467 (+106)
5.2470 (+3)
6.1472 (+2)
Note: [1][2]

In ensuing versions of the standard, more characters have been added to the block. These even include a few regular ideographs (with the Unified_Ideograph property) that do not have duplicates (U+FA0EU+FA0F, U+FA11, U+FA13U+FA14, U+FA1F, U+FA21, U+FA23U+FA24 and U+FA27U+FA29).[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.

Block

CJK Compatibility Ideographs[1][2]
Official Unicode Consortium code chart (PDF)
 0123456789ABCDEF
U+F90x
U+F91x
U+F92x
U+F93x 錄
U+F94x
U+F95x
U+F96x
U+F97x 勵
U+F98x
U+F99x
U+F9Ax
U+F9Bx 樂
U+F9Cx
U+F9Dx
U+F9Ex
U+F9Fx 刺
U+FA0x
U+FA1x
U+FA2x
U+FA3x 憎
U+FA4x
U+FA5x
U+FA6x
U+FA7x 奔
U+FA8x
U+FA9x
U+FAAx
U+FABx 謹
U+FACx
U+FADx
U+FAEx
U+FAFx
Notes
1.^ As of Unicode version 13.0
2.^ Grey areas indicate non-assigned code points

History

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

VersionFinal code points[lower-alpha 1]CountL2 IDWG2 IDIRG IDDocument
1.0.1U+F900..FA2D302(to be determined)
N782Ksar, Mike (1991-10-12), Attachment to N 767 WG2-Paris meeting copies of working papers
L2/03-399Fok, Anthony (2003-10-13), Unihan reported errors / changes re kHKSCS entries
L2/03-367N2667Suignard, Michel; Muller, Eric; Jenkins, John (2003-10-22), CJK Ideograph source references corrections
L2/03-398Nguyen, D. (2003-10-29), Unihan reported errors / changes re kCowles
L2/03-417Muller, Eric (2003-10-31), Variation sequences for CJK Compatibility characters
L2/06-309RKarlsson, Kent (2006-11-07), Bug in DerivedNumericValues.txt
L2/06-324R2Moore, Lisa (2006-11-29), "Consensus 109-C18", UTC #109 Minutes, Add numeric values to 8 compatibility ideographs to match their canonical characters.
L2/08-238Cook, Richard; Lunde, Ken (2008-06-09), Recommendation For IRG To Use IVD Collections
L2/08-373N3525Lunde, Ken; Muller, Eric (2008-10-06), Handling CJK compatibility characters with variation sequences
L2/08-425Cook, Richard; Lunde, Ken (2008-11-18), IRG Use of IVD Collections
L2/09-003RMoore, Lisa (2009-02-12), "WG2 — Compatibility Ideographs", UTC #118 / L2 #215 Minutes
L2/09-080N3590Muller, Eric (2009-03-11), Difficulties with compatibility ideographs
L2/09-290Muller, Eric (2009-08-07), Draft IVD registration for Compatibility Characters
L2/11-243N4111Sources for Orphaned CJK Ideographs, 2011-06-14
L2/11-254Constable, Peter (2011-06-20), "Update to UTR #45 U-Source Ideographs requested", UTC Liaison Report from WG2
N4103"Resolution 58.05", Unconfirmed minutes of WG 2 meeting 58, 2012-01-03
L2/17-090Chung, Jaemin (2017-04-07), Proposal to add informative notes and cross-reference to U+F92C and U+F9B8
L2/17-103Moore, Lisa (2017-05-18), "B.4.1 Proposal to add informative notes and cross-reference to U+F92C and U+F9B8", UTC #151 Minutes
3.2U+FA30..FA6A59L2/99-016N1935Paterson, Bruce (1998-11-30), Editorial corrigenda on CJK compatibility ideographs, and other items
L2/99-240Addition of fifty six KANJIs for compatibility, 1999-07-15
L2/99-232N2003Umamaheswaran, V. S. (1999-08-03), "7.2.2.1 Editorial corrigenda on CJK compatibility", Minutes of WG 2 meeting 36, Fukuoka, Japan, 1999-03-09--15
L2/99-311Addition of fifty six KANJIs for compatibility, 1999-08-23
L2/99-313N2095Sato, T. K. (1999-09-08), Addition of CJK ideographs which are already "unified"
L2/99-316Whistler, Ken (1999-09-13), Comments on JCS proposal
L2/99-322Collins, Lee (1999-10-11), Comments on JCS compatibility characters in L2/99-310 through L2/99-313
L2/99-365Moore, Lisa (1999-11-23), Comments on JCS Proposals
L2/99-383N2142N710The response to WG2 resolution M37.16: CJK compatibility ideographs from JIS (WG2 N2104), 1999-12-09
L2/00-010N2103Umamaheswaran, V. S. (2000-01-05), "8.8", Minutes of WG 2 meeting 37, Copenhagen, Denmark: 1999-09-13--16
L2/99-260RMoore, Lisa (2000-02-07), "JCS Proposals", Minutes of the UTC/L2 meeting in Mission Viejo, October 26-28, 1999
L2/00-101N2197Sato, T. K. (2000-03-15), Update: CJK COMPATIBILITY IDEOGRAPH request
L2/00-172N2221Sato, T. K. (2000-04-20), JIS COMPATIBILITY IDEOGRAPHS (draft for ammendment-1) [sic]
N2221RJIS COMPATIBILITY IDEOGRAPHS (draft for ammendment-1) [sic] revised, 2000-06-01
L2/00-190Moore, Lisa (2000-06-22), UTC Rescinds Acceptance of Four Duplicate Radicals from JIS X 213
L2/00-234N2203 (rtf, txt)Umamaheswaran, V. S. (2000-07-21), "7.3", Minutes from the SC2/WG2 meeting in Beijing, 2000-03-21 -- 24
L2/00-337N2273JIS compatibility ideographs, 2000-09-19
L2/00-378N2295Sato, T. K. (2000-10-26), Feedback from Japan on N2281 -- working draft on pDAM 1 -- CJK Compatibility
L2/01-420Whistler, Ken (2001-10-30), "1. SC2 M11-04", WG2 (Singapore) Resolution Consent Docket for UTC
L2/01-405RMoore, Lisa (2001-12-12), "Consensus 89-C20", Minutes from the UTC/L2 meeting in Mountain View, November 6-9, 2001
L2/06-321Whistler, Ken (2006-10-03), UCD Bug re JIS 0213
L2/06-324R2Moore, Lisa (2006-11-29), "Consensus 109-C16", UTC #109 Minutes, Give U+FA30..U+FA6A the ideographic property, and fix the wordbreak property.
4.1U+FA70..FAD9106L2/01-050N2253Umamaheswaran, V. S. (2001-01-21), "7.2.4 Proposal to add the Hanja column to 10646-1", Minutes of the SC2/WG2 meeting in Athens, September 2000
L2/01-350N2375Proposal to add 160 Compatibility Hanja code table of D P R of Korea into CJK Compatibility Ideographs, 2001-09-03
L2/02-154N2403Umamaheswaran, V. S. (2002-04-22), "TC 2", Draft minutes of WG 2 meeting 41, Hotel Phoenix, Singapore, 2001-10-15/19
N2478"Korea (DPRK):T2, USA T5", Proposed Disposition of comments on SC2 N 3584 (PDAM text for Amendment 2 to ISO/IEC 10646-1:2000), 2002-05-08
L2/02-232N2493Sato, T. K.; Kobayashi, Tatsuo; Pak Tong, Gi (2002-05-22), Proposal to add 122 compatibility Hanja code table of the D P R of Korea into the CJK Compatibility Ideographs of ISO/IEC 10646-1:2000
N2541"USA T.8", Proposed disposition of comments on SC2 N 3624 (FPDAM text for Amendment 2 to ISO/IEC 10646-1:2000), 2002-12-02
N2540Freytag, Asmus (2002-12-05), Corrections to CJK Compatibility Ideographs Table in FPDAM
L2/02-465N2566Collins, Lee; Freytag, Asmus (2002-12-09), Review of DPRK Compatibility Ideographs
L2/02-471N2572CJK Compatibility Ideographs (Unicode 3.2, page 399), 2002-12-18
L2/02-472N2573Report of DPRK compatibility characters ad hoc meeting, 2002-12-11
L2/02-468N2569Suignard, Michel (2002-12-12), "USA T.5 e, USA T.8", Proposed disposition of comments on SC2 N 3624 (FPDAM text for Amendment 2 to ISO/IEC 10646-1:2000)
L2/03-023N2569RSuignard, Michel (2003-01-27), "USA T.5 e, USA T.8", Disposition of Comments Report on 10646-1/FPDAM 2
L2/03-346Chang, Cora (2003-10-20), Analysis of characters in WG2 documents N2572, N2573
L2/03-346.1Chang, Cora (2003-10-20), Analysis of characters in WG2 documents N2572, N2573 [spreadsheet without glyphs]
L2/04-207N2776N1062Proposal to add 106 Compatibility Hanjas of D P R of Korea to CJK Compatibility Ideographs, 2004-05-25
L2/04-330Whistler, Ken (2004-08-03), "E", WG2 Consent Docket
L2/04-316Moore, Lisa (2004-08-19), "100-C12", UTC #100 Minutes
L2/05-050RN2924RFreytag, Asmus (2005-01-28), Charts - Amendments 1 and 2 to ISO/IEC 10646:2003
L2/10-367N3899KP1-0000, 2010-09-30
L2/11-243N4111Sources for Orphaned CJK Ideographs, 2011-06-14
L2/11-254Constable, Peter (2011-06-20), "Update to UTR #45 U-Source Ideographs requested", UTC Liaison Report from WG2
N4103"Resolution 58.05", Unconfirmed minutes of WG 2 meeting 58, 2012-01-03
5.2U+FA6B..FA6D3N3353 (pdf, doc)Umamaheswaran, V. S. (2007-10-10), "M51.10", Unconfirmed minutes of WG 2 meeting 51 Hanzhou, China; 2007-04-24/27
L2/07-387Proposal to encode six CJK Ideographs in UCS, 2007-10-17
L2/08-184N3318R (pdf, appendix)Revised proposal to encode six CJK Ideographs in UCS, 2008-03-25
L2/08-318N3453 (pdf, doc)Umamaheswaran, V. S. (2008-08-13), "M52.2k", Unconfirmed minutes of WG 2 meeting 52
L2/08-161R2Moore, Lisa (2008-11-05), "Consensus 115-C14", UTC #115 Minutes
6.1U+FA2E..FA2F2L2/10-087N3747A solution proposed by R.O.Korea for incorrectly mapped compatibility chars, 2010-03-19
L2/10-108Moore, Lisa (2010-05-19), "Consensus 123-C8", UTC #123 / L2 #220 Minutes
N3803 (pdf, doc)"M56.08l", Unconfirmed minutes of WG 2 meeting no. 56, 2010-09-24
  1. Proposed code points and characters names may differ from final code points and names

See also

References

  1. "Unicode character database". The Unicode Standard. Retrieved 2016-07-09.
  2. "Enumerated Versions of The Unicode Standard". The Unicode Standard. Retrieved 2016-07-09.
  3. "PropList.txt". Unicode Consortium.
  4. "Ideographic Variation Database". Unicode Consortium.
  5. "UTS #37, Unicode Ideographic Variation Database". Unicode Consortium.
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