ISO/IEC 10646:2020/Amd 1:2023

INTERNATIONAL  ISO/IEC
STANDARD 10646
Sixth edition
2020-12
AMENDMENT 1
2023-07
Information technology — Universal
coded character set (UCS)
AMENDMENT 1: CJK Unified Ideographs
Extension H, Vithkuqi, Old Uyghur, Cypro-
Minoan, and other characters
Technologies de l'information — Jeu universel de caractères codés
(JUC)
AMENDEMENT 1: Supplément H aux idéogrammes unifiés CJK,
Vithkuqi, vieil-ouïghour, Chypro-minoen, et autres caractères
Reference number
ISO/IEC 10646:2020/Amd. 1:2023(E)
© ISO/IEC 2023
ISO/IEC 10646:2020/Amd. 1:2023(E)
©  ISO/IEC 2023
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© ISO/IEC 2023 – All rights reserved

ISO/IEC 10646:2020/Amd.1:2023(E) Amendment1
Foreword
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iii © ISO/IEC 2023 – All rights reserved

Amendment 1 ISO/IEC 10646:2020/Amd.1:2023(E)

© ISO/IEC 2023– All rights reserved iv

Amendment 1 ISO/IEC 10646:2020/Amd.1:2023 (E)

Information technology — Universal
Coded Character Set (UCS) —
AMENDMENT 1: CJK Unified Ideographs Extension H,
Vithkuqi, Old Uyghur, Cypro-Minoan, and other
characters
Clause 2 Normative references
Update the following references:
Unicode Standard Annex, UAX #9, The Unicode Bidirectional Algorithm:
https://www.unicode.org/reports/tr9/tr9-46.html
Unicode Standard Annex, UAX #15, Unicode Normalization Forms:
https://www.unicode.org/reports/tr15/tr15-53.html
Unicode Technical Standard, UTS #37, Ideographic Variation Database:
http://www.unicode.org/reports/tr37/tr37-12.html
Unicode Standard Version 15.0, Chapter 4, Character Properties
https://www.unicode.org/versions/Unicode15.0.0/ch04.pdf
Section 4.3, Combining Classes – Normative
Section 4.5, General Category – Normative
Section 4.7, Bidi Mirrored – Normative
Unicode Standard Version 15.0, Age Property:
https://www.unicode.org/Public/15.0.0/ucd/DerivedAge.txt
Insert the new reference:
Unicode Standard Version 15.0, Character Name Aliases:
https://www.unicode.org/Public/15.0.0/ucd/NameAliases.txt
7.4 Naming of characters
In the paragraph after list item g), replace the sentence as follows:
Some characters may have one or more alternate names, called character name aliases. See 7.5.
Introduce a new sub-clause 7.5 with a new Table 2, renumbering the following tables and sub-clauses as
appropriate.
7.5 Character name aliases
This document has a mechanism for the publication of additional, normative formal aliases for char-
acters. These formal aliases are known as character name aliases. They function essentially as auxilia-
ry names for a character. Their main usage is to provide correction for known mistakes in character
names, but they have other usages such as providing string identifiers for control functions.
Character name aliases are listed in the file NameAliases.txt (see Clause 2). That file also documents
the ‘type’ field which distinguishes among different kinds of character name aliases, as shown in Ta-
ble 2.
© ISO/IEC 2023 – All rights reserved 1

ISO/IEC 10646:2020/Amd.1:2023 (E) Amendment 1
Table 2: Types of character name aliases
Type Description
Corrections for mistakes in the character names which
correction
cannot be fixed after publication of the standard
ISO/IEC 6429 names for C0 and C1 control functions,
control and other commonly occurring names for these control
functions
alternate Widely used alternate names for format characters
Several documented labels for C1 control code points
figment
which were never actually approved in any standard
Commonly occurring abbreviations or acronyms for
abbreviation control functions, format characters, spaces and varia-
tion selectors
Character name aliases follow the same rules as character names. See Clause 27.
8 Revision and updating of the UCS
Remove the NOTE which is superseded by sub-clause 7.5.
11 UCS Encoding schemes
11.5 UTF-16
Replace the third paragraph as follows:
In the absence of signature or a higher-level protocol, the octet order of the UTF-16 encoding scheme
is that the more significant octet precedes the less significant octet.
12 Use of control functions with the UCS
Replace NOTE 3 with the following text and note:
Control functions have associated string identifiers specified by the ‘control’ type in the file Name-
sAliases.txt (see Clause 2). Many of these control functions have multiple identifiers based on various
environments.
NOTE 3: For example, the control characters 000E and 000F are named SHIFT-OUT and SHIFT-IN respectively in a 7-
bit environment and LOCKING-SHIFT ONE and LOCKING-SHIFT ZERO respectively in an 8-bit environment.
17.6 Variation selector and variation sequences
17.6.1 General
In the second paragraph, replace ‘three Mongolian Free Variation Selectors (FVS1 to FVS3)’ by ‘four Mongolian
Free Variation Selectors (FVS1 to FVS4)’.
17.6.2 Standardized variations sequences
In the list item describing Mathematical symbols, remove the note and add the following sentence after ‘Mathemati-
cal symbol’:
Some variation sequences are used to describe a graphic variant while others are used to describe style
variant such as Chancery style versus roundhand style.
2  © ISO/IEC 2023 – All rights reserved

Amendment 1 ISO/IEC 10646:2020/Amd.1:2023 (E)

Add a new list item after CJK Unified Ideographs:
• Egyptian hieroglyphs. Each of these variation sequences correspond to a rotated Egyptian hieroglyph
(90, 180, and 270 degrees).
In the first paragraph, update the link with following:
https://standards.iso.org/iso-iec/10646/ed-6/en/amd/1/UCSVariants.txt
24.1 List of source references (for CJK ideographs)
In the list of Hanzi G sources, update the following entries as follows:
GHC HanYu Dacidian ﹙汉语大词典﹚, 1986年, 上海辞书出版社, 9187.11 / 1988-1993 年, 汉语大
词典出版社 (found in 1988), ISBN 7-5432-0001-5/H.2
GKJ China National Committee for Terms in Sciences and Technologies (CNCTST), names of geol-
ogy, botanical and zoology terms, WG2 N5072, Chinese medicine characters, IRG N2228.

In the list of Hanzi G sources, insert the following entries:
GDM Place name characters from the Public Order Administration, Ministry of Public Security,
People's Republic of China
GXM Human-name characters. Source from Public Order Administration, The Ministry of Public
Security of the People’s Republic of China
GZA-1 A Vibrant and Unbroken Transmission - Filial Piety and Zhuang Funeral Songs生生不息的传
承•孝与壮族行孝歌之研究, 2010年北京民族出版社, ISBN 978-7-1051-0648-6
GZA-2 Annotated Long Zhuang Morality Songs 壮族伦理道德长诗传扬歌译注, 2005年广西民族出
版社, ISBN 7-5363-4922-X
GZA-3 Compendium of Old Zhuang Folksong Texts - Wooing Songs vol. 1 – Liao Songs 壮族民歌古
籍集成•情歌（一）嘹歌, 1993广西民族出版社, ISBN 7-5363-2714-5
GZA-4 Compendium of Old Zhuang Folksong Texts - Wooing Songs vol. 2 – Fwen Nganx 壮族民歌古
籍集成•情歌（二）欢閦, 1997年南宁广西民族出版社, ISBN 7-5363-3298-X
GZA-5 Zhuang Character Database – Internet Collection方块壮字资料库·网络集 2011年广西大学 ,
桂 ICP备 05000940号
GZA-6 Zhuang Proverbs from China 中国壮族谚语 2015广州世界图书出版广东有限公司, ISBN
978-7-192-0492-1
GZA-7 Ancient Remembrance - Zhuang Creation Myth Songs 远古的追忆•壮族创世神话古歌研究,
2012年北京民族出版社, ISBN 978-7-1051-2242-4

In the list of Hanzi M sources, remove the existing MAC entry and replace by following:
MA Same as Hong Kong Supplementary Character Set -2008
MB1 Big-5, level 1
MB2 Big-5, level 2
MC Macao Supplementary Character Set (MSCS) – 2020
MD, MDH MSCS -2020, horizontal extension

In the list of ChuNom V sources, update the V4 entry and add a new VN entry:
V4 Kho Chữ Hán Nôm Mã Hoá (Hán Nôm Coded Character Repertoire), Hà Nội, 2007
VN Vietnamese Nôm characters not defined by V0 to V4 sources, major sources are:
Nguyễn Quang Hồng. "Tự Điển Chữ Nôm Dẫn Giải". Hà Nội, 2014, and
Anthony Trần Văn Kiệm "Giúp đọc Nôm và Hán Việt", Đà Na� ng, 2004
© ISO/IEC 2023 – All rights reserved 3

ISO/IEC 10646:2020/Amd.1:2023 (E) Amendment 1
24.2 Source reference file for CJK ideographs
In the first paragraph, update the link with following:
https://standards.iso.org/iso-iec/10646/ed-6/en/amd/1/CJKSrc.txt
In Table 5, replace the existing value for kIRG_Msource and add the format definitions to the existing G sources and
V sources according to the list of third field format per the following table:
Tag Value Third field format
kIRG_Gsource GDM-ddddd GXM-ddddd GZA-1ddddd GZA-2ddddd GZA-3ddddd GZA-4ddddd
GZA-6ddddd GZA-7ddddd
kIRG_Msource MA-hhhh MB1-hhhh MB2-hhhh MC-ddddd MD-hhhh MD-hhhhh MDH-hhhh
kIRG_VSource VN-hhhhh
24.3 Source reference presentation for CJK UNIFIED IDEOGRAPHS block
24.3.1 General
Replace the first sentence of second paragraph as follows:
The graphic representation for the radical is shown immediately below the code point, along with the
radical number, optionally followed by an apostrophe for simplified radicals, and the stroke count.
In last sentence of last paragraph, replace ‘G, T, J, K, KP, V, H, M, and U’ with ‘G, T, J, K, KP, V, H, M, U, UK, and S’.
24.3.2 Source reference presentation for CJK UNIFIED IDEOGRAPHS
Replace the two first paragraphs with the following:
For the presentation of the CJK UNIFIED IDEOGRAPH block, the graphic representations for the Hanzi
G, H, and T sources, the Kanji J source, the Hanja K source, and the ChuNom V source are shown in that
order when present in a first row. That row is not shown if none of these sources are specified for that
code point. An optional second row may be displayed to show the Hanzi M source, the Unicode U
sources, the UK UK source, and the SAT S source. Because at least one of these ten sources (G, H, T, J, K,
V, M, U, UK, and S) exists for any code point in that block, there is always one row visible for each code
point in that block. The KP source glyphs are not show for that block for lack of suitable font.
4  © ISO/IEC 2023 – All rights reserved

Amendment 1 ISO/IEC 10646:2020/Amd.1:2023 (E)

Figure 2 shows an example for characters 4E00-4E09 and 4E14-4E1C.
24.3.4 Source reference presentation for CJK UNIFIED IDEOGRAPHS EXTENSION B
Remove the sub-clause 24.3.4 and update all of the following sub-clause numbers accordingly.
24.3.5 Source reference presentation for CJK UNIFIED IDEOGRAPHS EXTENSION C, D, E, F, and G
Rename the sub-clause (now 24.3.4) as ‘Source reference presentation for CJK UNIFIED IDEOGRAPHS EXTENSION B,
C, D, E, F, G, and H’.
Replace the first paragraph with the following:
For the presentation of the CJK UNIFIED IDEOGRAPH EXTENSION B, C, D, E, F, G, and H blocks, up to
two sources per characters are represented in a single row. If more than two sources exist, additional
rows are used.
Update the Figure 5 title with following:
Figure 5 – Chart presentation for CJK UNIFIED IDEOGRAPHS EXTENSION B, C, D, E, F, G, and H
25.3 Source Reference presentation for Tanguts ideographs
Replace ‘Tanguts’ by ‘Tangut’ in the subclause heading.
26.2 Source Reference file for Nüshu characters
In the first paragraph, update the source reference file to the following:
© ISO/IEC 2023 – All rights reserved 5

ISO/IEC 10646:2020/Amd.1:2023 (E) Amendment 1
https://standards.iso.org/iso-iec/10646/ed-6/en/amd/1/NushuSrc.txt
28 Named UCS Sequence Identifier
In the third paragraph, update the list of named UCS sequences file to the following:
https://standards.iso.org/iso-iec/10646/ed-6/en/amd/1/NUSI.txt
34.5 Code charts and lists of character names
Insert the additional character glyphs and names at the indicated positions in the blocks given below.
Pl
...