CJK Unified Ideographs Extension B
| CJK Unified Ideographs Extension B | |
|---|---|
| Range |
U+20000..U+2A6DF (42,720 code points) |
| Plane | SIP |
| Scripts | Han |
| Assigned | 42,711 code points |
| Unused | 9 reserved code points |
| Unicode version history | |
| 3.1 | 42,711 (+42,711) |
| Note: [1][2] | |
CJK Unified Ideographs Extension B is a Unicode block containing rare and historic CJK ideographs for Chinese, Japanese, Korean, and Vietnamese.
- List of CJK Unified Ideographs Extension B (Part 1 of 7). Range: U+20000–U+215FF.
- List of CJK Unified Ideographs Extension B (Part 2 of 7). Range: U+21600–U+230FF.
- List of CJK Unified Ideographs Extension B (Part 3 of 7). Range: U+23100–U+245FF.
- List of CJK Unified Ideographs Extension B (Part 4 of 7). Range: U+24600–U+260FF.
- List of CJK Unified Ideographs Extension B (Part 5 of 7). Range: U+26100–U+275FF.
- List of CJK Unified Ideographs Extension B (Part 6 of 7). Range: U+27600–U+290FF.
- List of CJK Unified Ideographs Extension B (Part 7 of 7). Range: U+29100–U+2A6DF.
The block has dozens of variation sequences defined for standardized variants.[3]
It also has thousands 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.
It is the only CJK Unified Ideographs Extension block with a UCS2003 source identifier. Since Extension B contained too many characters, the original code charts were produced with a single glyph for all regions. The glyphs were designed by Beijing Zhongyi Electronic Ltd.. After the introduction of multi-column code charts, the original glyphs were retained under the UCS2003 source identifier. The glyphs are packaged in the "SimSun-ExtB" font distributed with the Simplified Chinese versions of Windows, and do not adhere to the glyphs for the Mainland China region.
Known Issues
Other 3 glyphs in Extension B
In CJK Unified Ideographs Extension B, some characters are incorrectly unified with others. These characters include U+2017B (𠅻), U+204AF (𠒯) and U+24CB2 (𤲲). The first two characters contained a wrong unification of Chinese Mainland and Vietnamese source of their glyph, while the last one unifies the Chinese Mainland and Taiwanese ones.[6]
Unifiable variants and exact duplicates in Extension B
Also in CJK Unified Ideographs Extension B, hundreds of glyph variants were encoded.[7] In addition to the deliberate encoding of close glyph variants, six exact duplicates (where the same character has inadvertently been encoded twice) and two semi-duplicates (where the CJK-B character represents a de facto disunification of two glyph forms unified in the corresponding BMP character) were encoded by mistake:[8]
- U+34A8 㒨 = U+20457 𠑗 : U+20457 is the same as the China-source glyph for U+34A8, but it is significantly different from the Taiwan-source glyph for U+34A8
- U+3DB7 㶷 = U+2420E 𤈎 : same glyph shapes
- U+8641 虁 = U+27144 𧅄 : U+27144 is the same as the Korean-source glyph for U+8641, but it is significantly different from the Chinese Mainland-, Taiwan- and Japan-source glyphs for U+8641
- U+204F2 𠓲 = U+23515 𣔕 : same glyph shapes, but ordered under different radicals
- U+249BC 𤦼 = U+249E9 𤧩 : same glyph shapes
- U+24BD2 𤯒 = U+2A415 𪐕 : same glyph shapes, but ordered under different radicals
- U+26842 𦡂 = U+26866 𦡦 : same glyph shapes
- U+FA23 﨣 = U+27EAF 𧺯 : same glyph shapes (U+FA23 﨣 is a unified CJK ideograph, despite its name "CJK COMPATIBILITY IDEOGRAPH-FA23.")
History
The following Unicode-related documents record the purpose and process of defining specific characters in the CJK Unified Ideographs Extension B block:
| Version | Final code points[lower-alpha 1] | Count | L2 ID | WG2 ID | IRG ID | Document |
|---|---|---|---|---|---|---|
| 3.1 | U+20000..2A6D6 | 42,711 | L2/99-239 | Addition of three hundred and fourteen KANJIs (from JIS X0213), 1999-07-15 | ||
| L2/99-310 | Addition of three hundred and thirteen KANJIs (from JIS X0213), 1999-08-23 | |||||
| L2/99-335 | N2109 | N674 | Zhoucai, Zhang (1999-09-03), SuperCJK, version 9.0 with Kangxi and HYD data | |||
| L2/99-336 | N2105 | N675 | CJK Unified Ideographs Extension B WD 6.0, 1999-09-03 | |||
| L2/99-316 | Whistler, Ken (1999-09-13), Comments on JCS proposal | |||||
| L2/99-312 | excerpt of usages and sources of proposed KANJIs in contemporary Japanese, 1999-10-06 | |||||
| L2/99-366 | Suignard, Michel (1999-11-24), Text for CD ballot of ISO/IEC 10646 part 2 | |||||
| L2/99-366.1 | Cover page for N3393, 1999-11-24 | |||||
| L2/99-366.2 | Suignard, Michel (1999-11-24), Text of CD 10646-2 | |||||
| L2/99-366.3 | Suignard, Michel (1999-11-24), CJK Ext. B pages 001-100 | |||||
| L2/99-366.4 | Suignard, Michel (1999-11-24), CJK Ext. B pages 101-200 | |||||
| L2/99-366.5 | Suignard, Michel (1999-11-24), CJK Ext. B pages 201-300 | |||||
| L2/99-366.6 | Suignard, Michel (1999-11-24), CJK Ext. B pages 301-335 | |||||
| L2/99-366.7 | Suignard, Michel (1999-11-24), Special Purpose Plane and Annexes | |||||
| L2/99-366.8 | Suignard, Michel (1999-11-24), Mapping of CJK Ext. B characters | |||||
| L2/99-385 | N2144 | N713R | Jenkins, John (1999-12-08), Clarification of the Non-Cognate Rule | |||
| L2/00-021R | ISO CD 10646 Part-2 vote -- A proposal to move JIS X 0213 Kanji characters on Extension-B into BMP, 2000-01-21 | |||||
| L2/00-030 | Enomoto, Yoshi (2000-01-31), Background of the proposal (for encoding of 302 ideographs from JIS X 0213) | |||||
| L2/00-036 | Umamaheswaran, V. S.; Sargent, Murray (2000-02-03), Expert contribution on the placement of additional unified ideographs from JIS X0213, HK, and Korea | |||||
| L2/01-026 | N2298 | N758 | CJK Unified Ideographs Extension B, PreDIS R1 For ISO/IEC DIS 10646-2:2000, 2000-11-21 | |||
| L2/01-027 | N2299 | N759 | Zhoucai, Zhang (2000-11-21), SuperCJK 11.1, A Super Set of Unified CJK Ideographs and Its Extension A & B | |||
| L2/01-136 | N2334 | Sato, T. K. (2001-03-28), Notification of an error and request for a correction regarding mapping information for a particular JIS X 0213 character in CJK UNIFIED IDEOGRAPHS EXTENSION-B | ||||
| L2/01-163 | N2347 | N785 | CJK Unified Ideographs Extension B PreIS For ISO/IEC 10646-2:2000, 2001-03-30 | |||
| L2/01-162 | N2349 | N787 | Zhoucai, Zhang (2001-04-02), Clarification On Versions of CJK Unified Ideographs Extension B As Well As SuperCJK | |||
| L2/02-122 | N2427 | Ksar, Mike (2002-03-18), Proposal to add 1 Hanja code of D P R of Korea into 10646-2:2001 | ||||
| L2/02-156 | N2427 | Proposal to add 1 Hanja code of D P R of Korea into ISO/IEC 10646-2:2001 [duplicate of L2/02-122], 2002-03-18 | ||||
| L2/02-201 | N2448 | N924 | Error Correction, 2002-05-08 | |||
| L2/02-416 | N2518 | Proposal to add 2 hanja codes of D P R of Korea into 10646-2:2001, 2002-11-01 | ||||
| L2/03-017 | Late DPRK Comments on SC 2 N 3625, 10646-2: 2001/FPDAM 1, 2002-12-09 | |||||
| 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 | |||||
| L2/03-311 | West, Andrew (2003-09-17), Unicode 4.0.1 Beta Review, comments from Andrew C. West | |||||
| L2/03-399 | Fok, Anthony (2003-10-13), Unihan reported errors / changes re kHKSCS entries | |||||
| 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 | |||||
| L2/04-008 | N2695 | N1026 | China's confirmation on fonts for CJK_B 21E2D and 21E45, 2004-01-05 | |||
| L2/04-208 | N2774R | N1064 | Proposal to add 6 KP source references to existing CJK Unified Ideographs, 2004-05-25 | |||
| L2/04-281 | N2830 | Suignard, Michel (2004-06-23), CJK Ideograph source visual references information | ||||
| L2/04-417 | Cook, Richard (2004-11-18), Extension B font versioning: preliminary work | |||||
| L2/05-022 | Cook, Richard (2005-01-25), Extension B font versioning: follow-up report, part 1 [text] | |||||
| L2/05-023 | Cook, Richard (2005-01-25), Extension B font versioning: follow-up report, part 2 [tables] | |||||
| L2/07-208 | N3285 | Proposal to replace 11 KP source references to existing ISO/IEC 10646:2003, 2007-07-18 | ||||
| L2/08-234 | N1406 | Cook, Richard; Bishop, Thomas; Lunde, Ken (2008-06-06), Han Unification Issues | ||||
| L2/08-310 | Cook, Richard (2008-08-12), Fonts for Extension B and C and IRG | |||||
| L2/10-215 | Lunde, Ken (2010-06-22), "Hanyo-Denshi" IVD Collection (PRI 167) to Adobe-Japan1-6 Mapping Table | |||||
| L2/11-243 | N4111 | Sources for Orphaned CJK Ideographs, 2011-06-14 | ||||
| L2/11-254 | Constable, Peter (2011-06-20), UTC Liaison Report from WG2 | |||||
| L2/14-260 | Suignard, Michel (2014-10-23), CJK chart and source references update | |||||
| ||||||
See also
References
- ↑ "Unicode character database". The Unicode Standard. Retrieved 2016-07-09.
- ↑ "Enumerated Versions of The Unicode Standard". The Unicode Standard. Retrieved 2016-07-09.
- ↑ "Unicode Character Database: Standardized Variation Sequences". The Unicode Consortium.
- ↑ "Ideographic Variation Database". Unicode Consortium.
- ↑ "UTS #37, Unicode Ideographic Variation Database". Unicode Consortium.
- ↑ Eiso Chan (陈永聪), Comments on four error glyphs on CJK Unified Ideographs Ext B & E.
- ↑ unifiable glyph variants
- ↑ Cook, Richard (6 October 2003). "Defect Report on Duplicate Encoded CJK Forms" (PDF). ISO/IEC JTC1/SC2/WG2. Retrieved 2012-03-28.