CJK Compatibility Ideographs is a Unicode block created to contain mostly 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. However, it also contains 12 unified ideographs sourced from Japanese character sets from IBM.
The block has dozens of ideographic variation sequences registered in the Unicode Ideographic Variation Database (IVD).1 2 These sequences specify the desired glyph variant for a given Unicode character.
Character sources
Sources for the original collection of CJK Compatibility Ideographs include:
- South Korean KS X 1001 (U+F900âU+FA0B, 268 characters)
- Taiwanese Big5 (U+FA0CâU+FA0D, 2 characters)
- âIBM 32â: 32 Japanese characters from IBM (U+FA0EâU+FA2D; see below)
In ensuing versions of the standard, more characters have been added to the block from:
- South Korean KS X 1001 (U+FA2EâU+FA2F, 2 characters)
- Japanese JIS X 0213 (U+FA30âU+FA6A, 59 characters)
- Japanese ARIB STD-B24 (U+FA6BâU+FA6D, 3 characters)
- North Korean KPS 10721-2000 (U+FA70âU+FAD9, 106 characters)
IBM Japanese double-byte EBCDIC includes several kanji which do not exist in, or do not round-trip from, JIS X 0208. These were included as gaiji in extensions to Shift JIS and EUC-JP from IBM (e.g. code page 942), NEC, the Open Software Foundation, and Microsoft (e.g. Windows code page 932). However, they were not used as a source for the original Unified Repertoire and Ordering (URO). Instead, 32 of the IBM extension kanji, those which had not been included in the URO from other sources, were included in the CJK Compatibility Ideographs block in the range U+FA0EâU+FA2D.
Of these 32 characters:
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19 are unifiable with characters in the URO, and are therefore compatibility ideographs in the strict sense.
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One (U+FA20 ïš CJK COMPATIBILITY IDEOGRAPH-FA20) is a kyĆ«jitai form of a kokuji whose extended shinjitai form exists in the URO (U+8612 è CJK UNIFIED IDEOGRAPH-8612). Both are hyĆgai kanji, and are variants of the jinmeiyĆ kanji U+8429 è© CJK UNIFIED IDEOGRAPH-8429 (i.e. Kummerowia). U+FA20 was assigned a normalisation to U+8612, even though the éŸ and äș components, while both forms of radical 213, are not usually considered unifiable.3
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The remaining 12 are kokuji characters which are actually unified ideographs (with the
Unified_Ideographproperty, and which do not change upon normalisation). In spite of their inclusion in the CJK Compatibility Ideographs block and their algorithmically generated character names beginning with âCJK COMPATIBILITY IDEOGRAPHâ, they are not duplicates of characters in the original CJK Unified Ideographs block in any respect;4 5 11 of these 12 are completely non-duplicate, while U+FA23 ïšŁ CJK COMPATIBILITY IDEOGRAPH-FA23 was later unintentionally duplicated in CJK Unified Ideographs Extension B as U+27EAF đ§șŻ CJK UNIFIED IDEOGRAPH-27EAF. They are as follows: -
U+FA0E ïš CJK COMPATIBILITY IDEOGRAPH-FA0E
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U+FA0F ïš CJK COMPATIBILITY IDEOGRAPH-FA0F
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U+FA11 ïš CJK COMPATIBILITY IDEOGRAPH-FA11
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U+FA13 ïš CJK COMPATIBILITY IDEOGRAPH-FA13
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U+FA14 ïš CJK COMPATIBILITY IDEOGRAPH-FA14
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U+FA1F ïš CJK COMPATIBILITY IDEOGRAPH-FA1F
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U+FA21 ïšĄ CJK COMPATIBILITY IDEOGRAPH-FA21
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U+FA23 ïšŁ CJK COMPATIBILITY IDEOGRAPH-FA23
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U+FA24  CJK COMPATIBILITY IDEOGRAPH-FA24
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U+FA27  CJK COMPATIBILITY IDEOGRAPH-FA27
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U+FA28 ïšš CJK COMPATIBILITY IDEOGRAPH-FA28
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U+FA29 ïš© CJK COMPATIBILITY IDEOGRAPH-FA29
Block
| CJK Compatibility Ideographs [1] [2] [3] Official Unicode Consortium code chart (PDF) | ||||||||||||||||
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | |
| U+F90x | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ |
| U+F91x | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ | ï€ |
| U+F92x | ï€ | ï€Ą | ï€ą | ï€Ł |  |  |  |  |  |  | ï€Ș |  | ï€Ź | ï€ | ï€ź | ï€Ż |
| U+F93x |  |  | ï€Č | ï€ł |  |  |  |  |  | ï€č | ï€ș |  |  |  |  | ï€ż |
| U+F94x | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ |
| U+F95x | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ | ï„ |
| U+F96x | ï„ | ï„Ą | ï„ą | ï„Ł | ï„€ | ï„„ | ï„Š |  | ï„š | ï„© | ï„Ș | ï„« | ï„Ź | ï„ | ï„ź | ï„Ż |
| U+F97x | ï„° |  | ï„Č | ï„ł | ï„Ž | ï„” |  | ï„· | ï„ž | ï„č | ï„ș | ï„» | ï„Œ | ï„œ | ï„Ÿ | ï„ż |
| U+F98x | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ |
| U+F99x | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ | ïŠ |
| U+F9Ax | ïŠ | ïŠĄ | ïŠą | ïŠŁ |  |  |  |  |  |  | ïŠȘ |  | ïŠŹ | ïŠ | ïŠź | ïŠŻ |
| U+F9Bx |  |  | ïŠČ | ïŠł |  |  |  |  |  | ïŠč | ïŠș |  |  |  |  | ïŠż |
| U+F9Cx | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ |
| U+F9Dx | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ | ï§ |
| U+F9Ex | ï§ | ï§Ą | ï§ą | ï§Ł | 燎 | 龍 | 流 | 裏 | 栗 | 里 | ï§Ș | 匿 | ï§Ź | ï§ | ï§ź | ï§Ż |
| U+F9Fx | 藺 | 隣 | ï§Č | ï§ł | 硫 | 倫 | 臨 | 立 | 吏 | ï§č | ï§ș | 炙 | 琉 | 隆 | 履 | ï§ż |
| U+FA0x | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš |
| U+FA1x | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš | ïš |
| U+FA2x | ïš | ïšĄ | ïšą | ïšŁ |  | ïš„ |  |  | ïšš | ïš© | ïšȘ | ïš« | ïšŹ | ïš | ïšź | ïšŻ |
| U+FA3x | ïš° | ïš± | ïšČ | ïšł |  | ïš” |  | ïš· | ïšž | ïšč | ïšș | ïš» |  | ïšœ |  | ïšż |
| U+FA4x | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© |
| U+FA5x | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© | ï© |
| U+FA6x | ï© | ï©Ą | ï©ą | ï©Ł | ï©€ | ï©„ | ï©Š | 逸 | ï©š | ï©© | ï©Ș | ï©« | ï©Ź | ï© | ||
| U+FA7x | ï©° | 况 | ï©Č | ï©ł | ï©Ž | ï©” | 勇 | ï©· | ï©ž | ï©č | ï©ș | ï©» | ï©Œ | ï©œ | ï©Ÿ | ï©ż |
| U+FA8x | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ |
| U+FA9x | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ | ïȘ |
| U+FAAx | ïȘ | ïȘĄ | ïȘą | ïȘŁ | ïȘ€ | ïȘ„ | ïȘŠ | ïȘ§ | ïȘš | ïȘ© | ïȘȘ | ïȘ« | ïȘŹ | ïȘ | ïȘź | ïȘŻ |
| U+FABx | ïȘ° | ïȘ± | ïȘČ | ïȘł | ïȘŽ | ïȘ” | ïȘ¶ | ïȘ· | ïȘž | ïȘč | ïȘș | ïȘ» | ïȘŒ | ïȘœ | ïȘŸ | ïȘż |
| U+FACx | ï« | ï« | ï« | ï« | ï« | ï« | ï« | ï« | ï« | ï« | ï« | ï« | ï« | ï« | ï« | ï« |
| U+FADx | ï« | ï« | ï« | ï« | ï« | ï« | ï« | ï« | ï« | ï« | ||||||
| U+FAEx | ||||||||||||||||
| U+FAFx | ||||||||||||||||
| Notes | ||||||||||||||||
History
The following Unicode-related documents record the purpose and process of defining specific characters in the CJK Compatibility Ideographs block:
| Version | 1 | Count | L2 ID | WG2 ID | IRG ID | Document |
|---|---|---|---|---|---|---|
| 1.0.1 | U+F900..FA2D | 302 | N782 | Ksar, Mike (1991-10-12), Attachment to N 767 WG2-Paris meeting copies of working papers | ||
| 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 | |||||
| L2/03-417 | Muller, Eric (2003-10-31), Variation sequences for CJK Compatibility characters | |||||
| L2/06-309R | Karlsson, Kent (2006-11-07), Bug in DerivedNumericValues.txt | |||||
| L2/06-324R2 | Moore, Lisa (2006-11-29), "Consensus 109-C18", UTC #109 Minutes, Add numeric values to 8 compatibility ideographs to match their canonical characters. | |||||
| L2/08-238 | Cook, Richard; Lunde, Ken (2008-06-09), Recommendation For IRG To Use IVD Collections | |||||
| L2/08-373 | N3525 | Lunde, Ken; Muller, Eric (2008-10-06), Handling CJK compatibility characters with variation sequences | ||||
| L2/08-425 | Cook, Richard; Lunde, Ken (2008-11-18), IRG Use of IVD Collections | |||||
| L2/09-003R | Moore, Lisa (2009-02-12), "WG2 â Compatibility Ideographs", UTC #118 / L2 #215 Minutes | |||||
| L2/09-080 | N3590 | Muller, Eric (2009-03-11), Difficulties with compatibility ideographs | ||||
| L2/09-290 | Muller, Eric (2009-08-07), Draft IVD registration for Compatibility Characters | |||||
| 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", Unconfirmed minutes of WG 2 meeting 58, 2012-01-03 | |||||
| L2/17-090 | Chung, Jaemin (2017-04-07), Proposal to add informative notes and cross-reference to U+F92C and U+F9B8 | |||||
| L2/17-103 | Moore, Lisa (2017-05-18), "B.4.1 Proposal to add informative notes and cross-reference to U+F92C and U+F9B8", UTC #151 Minutes | |||||
| 3.2 | U+FA30..FA6A | 59 | L2/99-016 | N1935 | Paterson, Bruce (1998-11-30), Editorial corrigenda on CJK compatibility ideographs, and other items | |
| L2/99-240 | Addition of fifty six KANJIs for compatibility, 1999-07-15 | |||||
| L2/99-232 | N2003 | Umamaheswaran, 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 | ||||
| L2/99-311 | Addition of fifty six KANJIs for compatibility, 1999-08-23 | |||||
| L2/99-313 | N2095 | Sato, T. K. (1999-09-08), Addition of CJK ideographs which are already "unified" | ||||
| L2/99-316 | Whistler, Ken (1999-09-13), Comments on JCS proposal | |||||
| L2/99-322 | Collins, Lee (1999-10-11), Comments on JCS compatibility characters in L2/99-310 through L2/99-313 | |||||
| L2/99-365 | Moore, Lisa (1999-11-23), Comments on JCS Proposals | |||||
| L2/99-383 | N2142 | N710 | The response to WG2 resolution M37.16: CJK compatibility ideographs from JIS (WG2 N2104), 1999-12-09 | |||
| L2/00-010 | N2103 | Umamaheswaran, V. S. (2000-01-05), "8.8", Minutes of WG 2 meeting 37, Copenhagen, Denmark: 1999-09-13â16 | ||||
| L2/99-260R | Moore, Lisa (2000-02-07), "JCS Proposals", Minutes of the UTC/L2 meeting in Mission Viejo, October 26-28, 1999 | |||||
| L2/00-101 | N2197 | Sato, T. K. (2000-03-15), Update: CJK COMPATIBILITY IDEOGRAPH request | ||||
| L2/00-172 | N2221 | Sato, T. K. (2000-04-20), JIS COMPATIBILITY IDEOGRAPHS (draft for ammendment-1) [sic] | ||||
| N2221R | JIS COMPATIBILITY IDEOGRAPHS (draft for ammendment-1) [sic] revised, 2000-06-01 | |||||
| L2/00-190 | Moore, Lisa (2000-06-22), UTC Rescinds Acceptance of Four Duplicate Radicals from JIS X 213 | |||||
| L2/00-234 | N2203 (rtf,txt) | Umamaheswaran, V. S. (2000-07-21), "7.3", Minutes from the SC2/WG2 meeting in Beijing, 2000-03-21 -- 24 | ||||
| L2/00-337 | N2273 | JIS compatibility ideographs, 2000-09-19 | ||||
| L2/00-378 | N2295 | Sato, T. K. (2000-10-26), Feedback from Japan on N2281 -- working draft on pDAM 1 -- CJK Compatibility | ||||
| L2/01-420 | Whistler, Ken (2001-10-30), "1. SC2 M11-04", WG2 (Singapore) Resolution Consent Docket for UTC | |||||
| L2/01-405R | Moore, Lisa (2001-12-12), "Consensus 89-C20", Minutes from the UTC/L2 meeting in Mountain View, November 6-9, 2001 | |||||
| L2/06-321 | Whistler, Ken (2006-10-03), UCD Bug re JIS 0213 | |||||
| L2/06-324R2 | Moore, Lisa (2006-11-29), "Consensus 109-C16", UTC #109 Minutes, Give U+FA30..U+FA6A the ideographic property, and fix the wordbreak property. | |||||
| 4.1 | U+FA70..FAD9 | 106 | L2/01-050 | N2253 | Umamaheswaran, 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 | |
| L2/01-350 | N2375 | Proposal to add 160 Compatibility Hanja code table of D P R of Korea into CJK Compatibility Ideographs, 2001-09-03 | ||||
| L2/02-154 | N2403 | Umamaheswaran, 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 | |||||
| L2/02-232 | N2493 | Sato, 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 | |||||
| N2540 | Freytag, Asmus (2002-12-05), Corrections to CJK Compatibility Ideographs Table in FPDAM | |||||
| L2/02-465 | N2566 | Collins, Lee; Freytag, Asmus (2002-12-09), Review of DPRK Compatibility Ideographs | ||||
| L2/02-471 | N2572 | CJK Compatibility Ideographs (Unicode 3.2, page 399), 2002-12-18 | ||||
| L2/02-472 | N2573 | Report of DPRK compatibility characters ad hoc meeting, 2002-12-11 | ||||
| L2/02-468 | N2569 | Suignard, 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) | ||||
| L2/03-023 | N2569R | Suignard, Michel (2003-01-27), "USA T.5 e, USA T.8", Disposition of Comments Report on 10646-1/FPDAM 2 | ||||
| L2/03-346 | Chang, Cora (2003-10-20), Analysis of characters in WG2 documents N2572, N2573 | |||||
| L2/03-346.1 | Chang, Cora (2003-10-20), Analysis of characters in WG2 documents N2572, N2573 [spreadsheet without glyphs] | |||||
| L2/04-207 | N2776 | N1062 | Proposal to add 106 Compatibility Hanjas of D P R of Korea to CJK Compatibility Ideographs, 2004-05-25 | |||
| L2/04-330 | Whistler, Ken (2004-08-03), "E", WG2 Consent Docket | |||||
| L2/04-316 | Moore, Lisa (2004-08-19), "100-C12", UTC #100 Minutes | |||||
| L2/05-050R | N2924R | Freytag, Asmus (2005-01-28), Charts - Amendments 1 and 2 to ISO/IEC 10646:2003 | ||||
| L2/10-367 | N3899 | KP1-0000, 2010-09-30 | ||||
| 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", Unconfirmed minutes of WG 2 meeting 58, 2012-01-03 | |||||
| 5.2 | U+FA6B..FA6D | 3 | N3353 (pdf,doc) | Umamaheswaran, V. S. (2007-10-10), "M51.10", Unconfirmed minutes of WG 2 meeting 51 Hanzhou, China; 2007-04-24/27 | ||
| L2/07-387 | Proposal to encode six CJK Ideographs in UCS, 2007-10-17 | |||||
| L2/08-184 | N3318R (pdf,appendix) | Revised proposal to encode six CJK Ideographs in UCS, 2008-03-25 | ||||
| L2/08-318 | N3453 (pdf,doc) | Umamaheswaran, V. S. (2008-08-13), "M52.2k", Unconfirmed minutes of WG 2 meeting 52 | ||||
| L2/08-161R2 | Moore, Lisa (2008-11-05), "Consensus 115-C14", UTC #115 Minutes | |||||
| 6.1 | U+FA2E..FA2F | 2 | L2/10-087 | N3747 | A solution proposed by R.O.Korea for incorrectly mapped compatibility chars, 2010-03-19 | |
| L2/10-108 | Moore, 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 | |||||
See also
References
Footnotes
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âIdeographic Variation Databaseâ. Unicode Consortium. â©
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âUTS #37, Unicode Ideographic Variation Databaseâ. Unicode Consortium. â©
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Ideographic Research Group (2024-11-19). âUCS Ideograph Non-Unifiable Component Variations Summary List (NUCV)â. UCV & NUCV Lists (PDF). ISO/IEC JTC1 / SC2 /WG2/ IRG N2746. â©
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âPropList.txtâ. Unicode Consortium. â©
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Freytag, Asmus; McGowan, Rick; Whistler, Ken (2021-06-14). âKnown Anomalies in Unicode Character Namesâ. Unicode Consortium. Unicode Technical Note #27. These 12 characters are unified CJK ideographs, not compatibility ideographs, despite their names. â©