CJK Unified Ideographs Extension-A is a Unicode block containing rare Han ideographs submitted to the Ideographic Research Group between 1992 and 1998, plus ten ideographs added in Unicode 13.0 which had previously been mistakenly unified with others.[3]
It also has thousands of ideographic variation sequences registered in the Unicode Ideographic Variation Database (IVD).[5][6]
These sequences specify the desired glyph variant for a given Unicode character.
Block
This list is a single Unicode block. For an overview of all CJK ideograph blocks in Unicode, see CJK Unified Ideographs.
The following Unicode-related documents record the purpose and process of defining specific characters in the CJK Unified Ideographs Extension A block:
Aliprand, Joan; Winkler, Arnold (1998-02-24), "3.B.1. Existing compatibility characters also in CJK Extension A", Preliminary Minutes - UTC #74 & L2 #171, Mountain View, CA - December 5, 1997
L2/98-096
N1723
CJK Unified Ideographs Extension A, High Quality Printing, Version 2.0, 1998-03-02
Chan, Eiso (2017-06-02), Request for consideration to add kIRG_GSource values to thirteen ideographs and change two G-source glyphs for the Table of General Standard Chinese Characters [Affects U+37C3 and 3FE0]
Shin, Sanghyun; Cho, Sungduk; Pyo, Seungju; Kim, Kyongsok (2018-12-13), Request to move character K6-1022 in Horizontal Extension of KS X 1027-5 from U+3EAC to U+248F2
Shin, SangHyun; Cho, Sungduk; Kim, Kyongsok (2021-11-02), A revised proposal requesting a Horizontal Extension of 51 Hanja chars (previously submitted for ExtF/G/H) [Affects U+34DC, 3BF6, and 3C43]
Unified
Unified
Unified
Unified
Unified
Unified
Unified
Unified
Unified
Unified
Not unified
Not unified
Not unified
Not unified
Not unified
Not unified
Not unified
12 are unified
Not unified
Not unified
Not unified
Han
Han
Han
Han
Han
Han
Han
Han
Han
Han
Han
Han Common
Han, Hangul, Common, Inherited
Common
Hangul, Katakana, Common
Katakana, Common
Han
Common Hiragana, Common
Han