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Technical Notes| Technical Notes |
| Version | 1 |
| Author | Ken Lunde 小林劍󠄁 |
| Date | 2023-10-19 |
| This Version | https://www.unicode.org/notes/tn53/tn53-1.html |
| Previous Version | n/a |
| Latest Version | https://www.unicode.org/notes/tn53/ |
This document provides the location of and additional background information on the historical “UCS2003” (ISO/IEC 10646:2003) representative glyphs that were removed from the code chart for the CJK Unified Ideographs Extension B block in Unicode Version 14.0.0 (September, 2021).
This document is a Unicode Technical Note. Sole responsibility for its contents rests with the author. Publication does not imply any endorsement by the Unicode Consortium.
For information on Unicode Technical Notes, including criteria for acceptance, see Unicode Technical Notes.
The archived CJK Unified Ideographs Extension B, UCS2003 Reference Glyphs code chart is available at the URL https://www.unicode.org/Public/13.0.0/charts/UCS2003.pdf as a 168-page PDF file (9MB).
The code chart for the CJK Unified Ideographs Extension B block became multicolumn in Unicode Version 5.2.0 (October, 2009). In order to preserve the historical single-column representative glyphs as shown in the ISO/IEC 10646:2003 standard, which is equivalent to Unicode Version 4.0.0, the “UCS2003” representative glyphs were added to this code chart in Unicode Version 6.1.0 (January, 2012) as the first representative glyph shown, and with “UCS2003” as the common source reference. The “UCS2003” representative glyphs, which were present only in the range U+20000 through U+2A6D6, were subsequently removed from this code chart in Unicode Version 14.0.0 (September, 2021), because they are unmaintained, misleading, serve no practical use, and lead to unnecessary reporting of errors. However, because the “UCS2003” representative glyphs are still considered useful for research and historical purposes, an archival CJK Unified Ideographs Extension B code chart that includes only the “UCS2003” representative glyphs was prepared, and is included in Unicode Version 13.0.0 (March, 2020).
The following summarizes modifications from the previous version of this document:
© 2023 Ken Lunde. This publication is protected by copyright, and permission must be obtained from the author and Unicode, Inc. prior to any reproduction, modification, or other use not permitted by the Terms of Use.
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