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CJK Compatibility is a Unicode block containing square symbols (both CJK and Latin alphanumeric) encoded for compatibility with East Asian character sets. In Unicode 1.0, it was divided into two blocks, named CJK Squared Words (U+3300–U+337F) and CJK Squared Abbreviations (U+3380–U+33FF).[3] The square forms can have different presentations when they are used in horizontal or vertical text. For example, the characters U+333E ㌾ SQUARE BORUTO (from ボルト) and U+3327 ㌧ SQUARE TON (from トン) should look different in horizontal and in vertical right-to-left:[4] ㌧㌾
Characters U+337B through U+337E are the Japanese era calendar scheme symbols Heisei (㍻), Shōwa (㍼), Taishō (㍽) and Meiji (㍾) (also available in certain legacy sets, such as the "NEC special characters" extension for JIS X 0208, as included in Microsoft's version and later JIS X 0213).[5] The Reiwa era symbol (U+32FF ㋿ SQUARE ERA NAME REIWA) is in Enclosed CJK Letters and Months (the CJK Compatibility block having been fully allocated by the time of its commencement).
| CJK Compatibility[1] Official Unicode Consortium code chart (PDF) | ||||||||||||||||
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | |
| U+330x | ㌀ | ㌁ | ㌂ | ㌃ | ㌄ | ㌅ | ㌆ | ㌇ | ㌈ | ㌉ | ㌊ | ㌋ | ㌌ | ㌍ | ㌎ | ㌏ |
| U+331x | ㌐ | ㌑ | ㌒ | ㌓ | ㌔ | ㌕ | ㌖ | ㌗ | ㌘ | ㌙ | ㌚ | ㌛ | ㌜ | ㌝ | ㌞ | ㌟ |
| U+332x | ㌠ | ㌡ | ㌢ | ㌣ | ㌤ | ㌥ | ㌦ | ㌧ | ㌨ | ㌩ | ㌪ | ㌫ | ㌬ | ㌭ | ㌮ | ㌯ |
| U+333x | ㌰ | ㌱ | ㌲ | ㌳ | ㌴ | ㌵ | ㌶ | ㌷ | ㌸ | ㌹ | ㌺ | ㌻ | ㌼ | ㌽ | ㌾ | ㌿ |
| U+334x | ㍀ | ㍁ | ㍂ | ㍃ | ㍄ | ㍅ | ㍆ | ㍇ | ㍈ | ㍉ | ㍊ | ㍋ | ㍌ | ㍍ | ㍎ | ㍏ |
| U+335x | ㍐ | ㍑ | ㍒ | ㍓ | ㍔ | ㍕ | ㍖ | ㍗ | ㍘ | ㍙ | ㍚ | ㍛ | ㍜ | ㍝ | ㍞ | ㍟ |
| U+336x | ㍠ | ㍡ | ㍢ | ㍣ | ㍤ | ㍥ | ㍦ | ㍧ | ㍨ | ㍩ | ㍪ | ㍫ | ㍬ | ㍭ | ㍮ | ㍯ |
| U+337x | ㍰ | ㍱ | ㍲ | ㍳ | ㍴ | ㍵ | ㍶ | ㍷ | ㍸ | ㍹ | ㍺ | ㍻ | ㍼ | ㍽ | ㍾ | ㍿ |
| U+338x | ㎀ | ㎁ | ㎂ | ㎃ | ㎄ | ㎅ | ㎆ | ㎇ | ㎈ | ㎉ | ㎊ | ㎋ | ㎌ | ㎍ | ㎎ | ㎏ |
| U+339x | ㎐ | ㎑ | ㎒ | ㎓ | ㎔ | ㎕ | ㎖ | ㎗ | ㎘ | ㎙ | ㎚ | ㎛ | ㎜ | ㎝ | ㎞ | ㎟ |
| U+33Ax | ㎠ | ㎡ | ㎢ | ㎣ | ㎤ | ㎥ | ㎦ | ㎧ | ㎨ | ㎩ | ㎪ | ㎫ | ㎬ | ㎭ | ㎮ | ㎯ |
| U+33Bx | ㎰ | ㎱ | ㎲ | ㎳ | ㎴ | ㎵ | ㎶ | ㎷ | ㎸ | ㎹ | ㎺ | ㎻ | ㎼ | ㎽ | ㎾ | ㎿ |
| U+33Cx | ㏀ | ㏁ | ㏂ | ㏃ | ㏄ | ㏅ | ㏆ | ㏇ | ㏈ | ㏉ | ㏊ | ㏋ | ㏌ | ㏍ | ㏎ | ㏏ |
| U+33Dx | ㏐ | ㏑ | ㏒ | ㏓ | ㏔ | ㏕ | ㏖ | ㏗ | ㏘ | ㏙ | ㏚ | ㏛ | ㏜ | ㏝ | ㏞ | ㏟ |
| U+33Ex | ㏠ | ㏡ | ㏢ | ㏣ | ㏤ | ㏥ | ㏦ | ㏧ | ㏨ | ㏩ | ㏪ | ㏫ | ㏬ | ㏭ | ㏮ | ㏯ |
| U+33Fx | ㏰ | ㏱ | ㏲ | ㏳ | ㏴ | ㏵ | ㏶ | ㏷ | ㏸ | ㏹ | ㏺ | ㏻ | ㏼ | ㏽ | ㏾ | ㏿ |
Notes
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The following Unicode-related documents record the purpose and process of defining specific characters in the CJK Compatibility block:
| Version | Final code points[a] | Count | L2 ID | WG2 ID | Document |
|---|---|---|---|---|---|
| 1.0.0 | U+3300..3357, 337B..33DD | 187 | (to be determined) | ||
| N2956 | Freytag, Asmus (2005-08-12), "Representative Glyph for U+33AC SQUARE GPA", Unicode Consortium Liaison Report for WG2 Meeting #47 | ||||
| N2953 (pdf, doc) | Umamaheswaran, V. S. (2006-02-16), "M47.16 (Miscellaneous glyph defects)", Unconfirmed minutes of WG 2 meeting 47, Sophia Antipolis, France; 2005-09-12/15 | ||||
| 1.1 | U+3358..3376, 33E0..33FE | 62 | (to be determined) | ||
| 4.0 | U+3377..337A, 33DE..33DF, 33FF | 7 | L2/99-353 | N2056 | "3", Amendment of the part concerning the Korean characters in ISO/IEC 10646-1:1998 amendment 5, 1999-07-29 |
| L2/99-380 | Proposal for a New Work item (NP) to amend the Korean part in ISO/IEC 10646-1:1993, 1999-12-07 | ||||
| L2/99-380.3 | Annex B, Special characters compatible with KPS 9566-97 (To be extended), 1999-12-07 | ||||
| L2/00-084 | N2182 | "3", Amendment of the part concerning the Korean characters in ISO/IEC 10646-1:1998 amendment 5 (Cover page and outline of proposal L2/99-380), 1999-12-07 | |||
| L2/99-382 | Whistler, Ken (1999-12-09), "2.3", Comments to accompany a U.S. NO vote on JTC1 N5999, SC2 N3393, New Work item proposal (NP) for an amendment of the Korean part of ISO/IEC 10646-1:1993 | ||||
| L2/00-066 | N2170 (pdf, doc) | "3", The technical justification of the proposal to amend the Korean character part of ISO/IEC 10646-1 (proposed addition of 79 symbolic characters), 2000-02-10 | |||
| L2/00-073 | N2167 | Karlsson, Kent (2000-03-02), Comments on DPRK New Work Item proposal on Korean characters | |||
| L2/00-285 | N2244 | Proposal for the Addition of 82 Symbols to ISO/IEC 10646-1:2000, 2000-08-10 | |||
| L2/00-291 | Everson, Michael (2000-08-30), Comments to Korean proposals (L2/00-284 - 289) | ||||
| N2282 | Report of the meeting of the Korean script ad hoc group, 2000-09-21 | ||||
| L2/01-349 | N2374R | Proposal to add of 70 symbols to ISO/IEC 10646-1:2000, 2001-09-03 | |||
| L2/01-387 | N2390 | Kim, Kyongsok (2001-10-13), ROK's Comments about DPRK's proposal, WG2 N 2374, to add 70 symbols to ISO/IEC 10646-1:2000 | |||
| L2/01-388 | N2392 | Kim, Kyongsok (2001-10-16), A Report of Korean Script ad hoc group meeting on Oct. 15, 2001 | |||
| L2/01-420 | Whistler, Ken (2001-10-30), "f. Miscellaneous symbol additions from DPRK standard", WG2 (Singapore) Resolution Consent Docket for UTC | ||||
| L2/01-458 | N2407 | Umamaheswaran, V. S. (2001-11-16), Request to Korean ad hoc group to generate mapping tables between ROK and DPRK national standards | |||
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