Unicode alias names and abbreviations

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In Unicode, characters can have a unique name. A character can also have one or more alias names. An alias name can be an abbreviation, a C0 or C1 control name, a correction, an alternate name or a figment. An alias too is unique over all names and aliases, and therefore identifying.

Background[edit]

The formal, primary Unicode name is unique over all names, only uses certain characters & format, and is guaranteed never to change. The formal name consists of characters A–Z (uppercase), 0–9, " " (space), and "-" (hyphen). Next to this name, a character can have one or more formal (normative) alias names. Such an alias name also follows the rules of a name: characters used (A-Z, -, 0-9, <space>) and not used (a-z, %, $, etc.). Alias names are also unique in the full name set (that is, all names and alias names are all unique in their combined set). Alias names are formally described in the Unicode Standard.[1][2]

In this sense, an abbreviation is also considered a name.

The Unicode standard also uses (publishes[where?]) "alias names" that are not formal, and are not listed in the normative NameAliases.txt file. These names may not be unique and may use incorrect characters in their name.[citation needed]

Reason to add an alias[edit]

There are five possible reasons to assign an alias name to a code point.[1] A character can have multiple aliases: for example U+0008 <control-0008> has control alias BACKSPACE and abbreviation alias BS.

1. Abbreviation
Commonly occurring abbreviations (or acronyms) for control codes, format characters, spaces, and variation selectors.
There are 353 such aliases, including 256 aliases for variant selectors (VS-1 ... VS-256).
For example, U+00A0   NO-BREAK SPACE has alias NBSP.
Presentation: in the code charts, the abbreviation is shown in a dashed box:
NBSP
.
2. Control
ISO 6429 names for C0 and C1 control functions and similar commonly occurring names, are added as an alias to the character.
There are 84 such aliases.
For example, U+0008 <control-0008> has alias BACKSPACE.
Presentation: Control characters do not have a primary name, they are labeled like <control-0008>. Its alias name like BACKSPACE is used in the chart documentation, but never as a primary name. This prevents unintended (automated) replacement by the actual, disrupting control character. For example, using alias name BEL in line would be replaced by U+0007 <control-0007>, triggering the bell sound.
3. Correction
This is a correction for a "serious problem" in the primary character name, usually an error.
There are 29 such aliases.
For example, U+2118 SCRIPT CAPITAL P is actually a lowercase p, and so is given alias name ※ WEIERSTRASS ELLIPTIC FUNCTION: "actually this has the form of a lowercase calligraphic p, despite its name, and through the alias the correct spelling is added."
Presentation: A corrected name is preceded by symbol ※ (the reference mark).
4. Alternate
A few widely used alternate names for format characters.
There is 1 such alias.
Example: U+FEFF ZERO WIDTH NO-BREAK SPACE has alternate BYTE ORDER MARK.
Presentation: listed in character charts description.
5. Figment
Several documented labels for C1 control code points which were never actually approved in any standard (figment = feigned, in fiction).
There are 3 such aliases.
For example, U+0099 <control-0099> has figment alias SINGLE GRAPHIC CHARACTER INTRODUCER. This name is an architectural concept from early drafts of ISO/IEC 10646-1, but it was never approved and standardized.
Presentation: These figment abbreviations are not published in Standard; the chart shows "XXX" for each informally, that is: not a unique or identifying abbreviation.

Formal aliases[edit]

U+ html
decimal
Name
or <label>
Alias Reason Chart Note
Abbr Name
0000 &#0; <control-0000>
NUL
NULL Control C0 Controls and Basic Latin (pdf)
0001 &#1; <control-0001>
SOH
START OF HEADING Control C0 Controls and Basic Latin (pdf)
0002 &#2; <control-0002>
STX
START OF TEXT Control C0 Controls and Basic Latin (pdf)
0003 &#3; <control-0003>
ETX
END OF TEXT Control C0 Controls and Basic Latin (pdf)
0004 &#4; <control-0004>
EOT
END OF TRANSMISSION Control C0 Controls and Basic Latin (pdf)
0005 &#5; <control-0005>
ENQ
ENQUIRY Control C0 Controls and Basic Latin (pdf)
0006 &#6; <control-0006>
ACK
ACKNOWLEDGE Control C0 Controls and Basic Latin (pdf)
0007 &#7; <control-0007>
BEL
ALERT Control C0 Controls and Basic Latin (pdf)
0008 &#8; <control-0008>
BS
BACKSPACE Control C0 Controls and Basic Latin (pdf)
0009 &Tab;
&#9;
<control-0009>
TAB
CHARACTER TABULATION Control C0 Controls and Basic Latin (pdf)
HT
HORIZONTAL TABULATION Control
000A &#10; <control-000A>
LF
LINE FEED Control C0 Controls and Basic Latin (pdf)
NL
NEW LINE Control
EOL
END OF LINE Control
000B &#11; <control-000B> LINE TABULATION Control C0 Controls and Basic Latin (pdf)
VT
VERTICAL TABULATION Control
000C &#12; <control-000C>
FF
FORM FEED Control C0 Controls and Basic Latin (pdf)
000D &#13; <control-000D>
CR
CARRIAGE RETURN Control C0 Controls and Basic Latin (pdf)
000E &#14; <control-000E>
SO
SHIFT OUT Control C0 Controls and Basic Latin (pdf)
LOCKING-SHIFT ONE Control
000F &#15; <control-000F>
SI
SHIFT IN Control C0 Controls and Basic Latin (pdf)
LOCKING-SHIFT ZERO Control
0010 &#16; <control-0010>
DLE
DATA LINK ESCAPE Control C0 Controls and Basic Latin (pdf)
0011 &#17; <control-0011>
DC1
DEVICE CONTROL ONE Control C0 Controls and Basic Latin (pdf)
0012 &#18; <control-0012>
DC2
DEVICE CONTROL TWO Control C0 Controls and Basic Latin (pdf)
0013 &#19; <control-0013>
DC3
DEVICE CONTROL THREE Control C0 Controls and Basic Latin (pdf)
0014 &#20; <control-0014>
DC4
DEVICE CONTROL FOUR Control C0 Controls and Basic Latin (pdf)
0015 &#21; <control-0015>
NAK
NEGATIVE ACKNOWLEDGE Control C0 Controls and Basic Latin (pdf)
0016 &#22; <control-0016>
SYN
SYNCHRONOUS IDLE Control C0 Controls and Basic Latin (pdf)
0017 &#23; <control-0017>
ETB
END OF TRANSMISSION BLOCK Control C0 Controls and Basic Latin (pdf)
0018 &#24; <control-0018>
CAN
CANCEL Control C0 Controls and Basic Latin (pdf)
0019 &#25; <control-0019>
EOM
END OF MEDIUM Control C0 Controls and Basic Latin (pdf)
001A &#26; <control-001A>
SUB
SUBSTITUTE Control C0 Controls and Basic Latin (pdf)
001B &#27; <control-001B>
ESC
ESCAPE Control C0 Controls and Basic Latin (pdf)
001C &#28; <control-001C> INFORMATION SEPARATOR FOUR Control C0 Controls and Basic Latin (pdf)
FS
FILE SEPARATOR Control
001D &#29; <control-001D> INFORMATION SEPARATOR THREE Control C0 Controls and Basic Latin (pdf)
GS
GROUP SEPARATOR Control
001E &#30; <control-001E> INFORMATION SEPARATOR TWO Control C0 Controls and Basic Latin (pdf)
RS
RECORD SEPARATOR Control
001F &#31; <control-001F> INFORMATION SEPARATOR ONE Control C0 Controls and Basic Latin (pdf)
US
UNIT SEPARATOR Control
0020 &#32; SPACE
SP
Abbreviation C0 Controls and Basic Latin (pdf)
007F &#127; <control-007F>
DEL
DELETE Control C0 Controls and Basic Latin (pdf)
0080 &#128; <control-0080>
PAD
PADDING CHARACTER Figment C1 Controls and Latin-1 Supplement (pdf) Aliases are not widely published by Unicode; chart shows non-unique XXX
0081 &#129; <control-0081>
HOP
HIGH OCTET PRESET Figment C1 Controls and Latin-1 Supplement (pdf) Aliases are not widely published by Unicode; chart shows non-unique XXX
0082 &#130; <control-0082>
BPH
BREAK PERMITTED HERE Control C1 Controls and Latin-1 Supplement (pdf)
0083 &#131; <control-0083>
NBH
NO BREAK HERE Control C1 Controls and Latin-1 Supplement (pdf)
0084 &#132; <control-0084>
IND
INDEX Control C1 Controls and Latin-1 Supplement (pdf)
0085 &#133; <control-0085>
NEL
NEXT LINE Control C1 Controls and Latin-1 Supplement (pdf)
0086 &#134; <control-0086>
SSA
START OF SELECTED AREA Control C1 Controls and Latin-1 Supplement (pdf)
0087 &#135; <control-0087>
ESA
END OF SELECTED AREA Control C1 Controls and Latin-1 Supplement (pdf)
0088 &#136; <control-0088> CHARACTER TABULATION SET Control C1 Controls and Latin-1 Supplement (pdf)
HTS
HORIZONTAL TABULATION SET Control
0089 &#137; <control-0089> CHARACTER TABULATION WITH JUSTIFICATION Control C1 Controls and Latin-1 Supplement (pdf)
HTJ
HORIZONTAL TABULATION WITH JUSTIFICATION Control
008A &#138; <control-008A> LINE TABULATION SET Control C1 Controls and Latin-1 Supplement (pdf)
VTS
VERTICAL TABULATION SET Control
008B &#139; <control-008B> PARTIAL LINE FORWARD Control C1 Controls and Latin-1 Supplement (pdf)
PLD
PARTIAL LINE DOWN Control
008C &#140; <control-008C> PARTIAL LINE BACKWARD Control C1 Controls and Latin-1 Supplement (pdf)
PLU
PARTIAL LINE UP Control
008D &#141; <control-008D> REVERSE LINE FEED Control C1 Controls and Latin-1 Supplement (pdf)
RI
REVERSE INDEX Control
008E &#142; <control-008E> SINGLE SHIFT TWO Control C1 Controls and Latin-1 Supplement (pdf)
SS2
SINGLE-SHIFT-2 Control
008F &#143; <control-008F> SINGLE SHIFT THREE Control C1 Controls and Latin-1 Supplement (pdf)
SS3
SINGLE-SHIFT-3 Control
0090 &#144; <control-0090>
DCS
DEVICE CONTROL STRING Control C1 Controls and Latin-1 Supplement (pdf)
0091 &#145; <control-0091> PRIVATE USE ONE Control C1 Controls and Latin-1 Supplement (pdf)
PU1
PRIVATE USE-1 Control
0092 &#146; <control-0092> PRIVATE USE TWO Control C1 Controls and Latin-1 Supplement (pdf)
PU2
PRIVATE USE-2 Control
0093 &#147; <control-0093>
STS
SET TRANSMIT STATE Control C1 Controls and Latin-1 Supplement (pdf)
0094 &#148; <control-0094>
CCH
CANCEL CHARACTER Control C1 Controls and Latin-1 Supplement (pdf)
0095 &#149; <control-0095>
MW
MESSAGE WAITING Control C1 Controls and Latin-1 Supplement (pdf)
0096 &#150; <control-0096> START OF GUARDED AREA Control C1 Controls and Latin-1 Supplement (pdf)
SPA
START OF PROTECTED AREA Control
0097 &#151; <control-0097> END OF GUARDED AREA Control C1 Controls and Latin-1 Supplement (pdf)
EPA
END OF PROTECTED AREA Control
0098 &#152; <control-0098>
SOS
START OF STRING Control C1 Controls and Latin-1 Supplement (pdf)
0099 &#153; <control-0099>
SGC
SINGLE GRAPHIC CHARACTER INTRODUCER Figment C1 Controls and Latin-1 Supplement (pdf) Aliases are not widely published by Unicode; chart shows non-unique XXX
009A &#154; <control-009A>
SCI
SINGLE CHARACTER INTRODUCER Control C1 Controls and Latin-1 Supplement (pdf)
009B &#155; <control-009B>
CSI
CONTROL SEQUENCE INTRODUCER Control C1 Controls and Latin-1 Supplement (pdf)
009C &#156; <control-009C>
ST
STRING TERMINATOR Control C1 Controls and Latin-1 Supplement (pdf)
009D &#157; <control-009D>
OSC
OPERATING SYSTEM COMMAND Control C1 Controls and Latin-1 Supplement (pdf)
009E &#158; <control-009E>
PM
PRIVACY MESSAGE Control C1 Controls and Latin-1 Supplement (pdf)
009F &#159; <control-009F>
APC
APPLICATION PROGRAM COMMAND Control C1 Controls and Latin-1 Supplement (pdf)
00A0 &nbsp; &NonBreakingSpace;
&#160;
NO-BREAK SPACE
NBSP
Abbreviation C1 Controls and Latin-1 Supplement (pdf)
00AD &shy;
&#173;
SOFT HYPHEN
SHY
Abbreviation C1 Controls and Latin-1 Supplement (pdf)
01A2 &#418; LATIN CAPITAL LETTER OI LATIN CAPITAL LETTER GHA ※ Correction Latin Extended-B (pdf)
01A3 &#419; LATIN SMALL LETTER OI LATIN SMALL LETTER GHA ※ Correction Latin Extended-B (pdf)
034F &#847; COMBINING GRAPHEME JOINER
CGJ
Abbreviation Combining Diacritical Marks (pdf) The name of this character is misleading; it does not actually join graphemes
061C &#1564; ARABIC LETTER MARK
ALM
Abbreviation Arabic (pdf) See RLM
0709 &#1801; SYRIAC SUBLINEAR COLON SKEWED RIGHT SYRIAC SUBLINEAR COLON SKEWED LEFT ※ Correction Syriac (pdf)
0CDE &#3294; KANNADA LETTER FA KANNADA LETTER LLLA ※ Correction Kannada (pdf)
0E9D &#3741; LAO LETTER FO TAM LAO LETTER FO FON ※ Correction Lao (pdf)
0E9F &#3743; LAO LETTER FO SUNG LAO LETTER FO FAY ※ Correction Lao (pdf)
0EA3 &#3747; LAO LETTER LO LING LAO LETTER RO ※ Correction Lao (pdf)
0EA5 &#3749; LAO LETTER LO LOOT LAO LETTER LO ※ Correction Lao (pdf)
0FD0 &#4048; TIBETAN MARK BSKA- SHOG GI MGO RGYAN TIBETAN MARK BKA- SHOG GI MGO RGYAN ※ Correction Tibetan (pdf)
11EC &#4588; HANGUL JONGSEONG IEUNG-KIYEOK HANGUL JONGSEONG YESIEUNG-KIYEOK ※ Correction Hangul Jamo (pdf)
11ED &#4589; HANGUL JONGSEONG IEUNG-SSANGKIYEOK HANGUL JONGSEONG YESIEUNG-SSANGKIYEOK ※ Correction Hangul Jamo (pdf)
11EE &#4590; HANGUL JONGSEONG SSANGIEUNG HANGUL JONGSEONG SSANGYESIEUNG ※ Correction Hangul Jamo (pdf)
11EF &#4591; HANGUL JONGSEONG IEUNG-KHIEUKH HANGUL JONGSEONG YESIEUNG-KHIEUKH ※ Correction Hangul Jamo (pdf)
180B &#6155; MONGOLIAN FREE VARIATION SELECTOR ONE
FVS1
Abbreviation Mongolian (pdf)
180C &#6156; MONGOLIAN FREE VARIATION SELECTOR TWO
FVS2
Abbreviation Mongolian (pdf)
180D &#6157; MONGOLIAN FREE VARIATION SELECTOR THREE
FVS3
Abbreviation Mongolian (pdf)
180E &#6158; MONGOLIAN VOWEL SEPARATOR
MVS
Abbreviation Mongolian (pdf)
180F &#6159; MONGOLIAN FREE VARIATION SELECTOR FOUR
FVS4
Abbreviation Mongolian (pdf)
200B &NegativeMediumSpace; &NegativeThickSpace; &NegativeThinSpace; &NegativeVeryThinSpace; &ZeroWidthSpace;
&#8203;
ZERO WIDTH SPACE
ZWSP
Abbreviation General Punctuation (pdf)
200C &zwnj;
&#8204;
ZERO WIDTH NON-JOINER
ZWNJ
Abbreviation General Punctuation (pdf)
200D &zwj;
&#8205;
ZERO WIDTH JOINER
ZWJ
Abbreviation General Punctuation (pdf)
200E &lrm;
&#8206;
LEFT-TO-RIGHT MARK
LRM
Abbreviation General Punctuation (pdf)
200F &rlm;
&#8207;
RIGHT-TO-LEFT MARK
RLM
Abbreviation General Punctuation (pdf)
202A &#8234; LEFT-TO-RIGHT EMBEDDING
LRE
Abbreviation General Punctuation (pdf)
202B &#8235; RIGHT-TO-LEFT EMBEDDING
RLE
Abbreviation General Punctuation (pdf)
202C &#8236; POP DIRECTIONAL FORMATTING
PDF
Abbreviation General Punctuation (pdf)
202D &#8237; LEFT-TO-RIGHT OVERRIDE
LRO
Abbreviation General Punctuation (pdf)
202E &#8238; RIGHT-TO-LEFT OVERRIDE
RLO
Abbreviation General Punctuation (pdf)
202F &#8239; NARROW NO-BREAK SPACE
NNBSP
Abbreviation General Punctuation (pdf)
205F &MediumSpace;
&#8287;
MEDIUM MATHEMATICAL SPACE
MMSP
Abbreviation General Punctuation (pdf)
2060 &NoBreak;
&#8288;
WORD JOINER
WJ
Abbreviation General Punctuation (pdf)
2066 &#8294; LEFT-TO-RIGHT ISOLATE
LRI
Abbreviation General Punctuation (pdf)
2067 &#8295; RIGHT-TO-LEFT ISOLATE
RLI
Abbreviation General Punctuation (pdf)
2068 &#8296; FIRST STRONG ISOLATE
FSI
Abbreviation General Punctuation (pdf)
2069 &#8297; POP DIRECTIONAL ISOLATE
PDI
Abbreviation General Punctuation (pdf)
2118 &weierp; &wp;
&#8472;
SCRIPT CAPITAL P WEIERSTRASS ELLIPTIC FUNCTION ※ Correction Letterlike Symbols (pdf)
2448 &#9288; OCR DASH MICR ON US SYMBOL ※ Correction Optical Character Recognition (pdf)
2449 &#9289; OCR CUSTOMER ACCOUNT NUMBER MICR DASH SYMBOL ※ Correction Optical Character Recognition (pdf)
2B7A &#11130; LEFTWARDS TRIANGLE-HEADED ARROW WITH DOUBLE HORIZONTAL STROKE LEFTWARDS TRIANGLE-HEADED ARROW WITH DOUBLE VERTICAL STROKE ※ Correction Miscellaneous Symbols and Arrows (pdf)
2B7C &#11132; RIGHTWARDS TRIANGLE-HEADED ARROW WITH DOUBLE HORIZONTAL STROKE RIGHTWARDS TRIANGLE-HEADED ARROW WITH DOUBLE VERTICAL STROKE ※ Correction Miscellaneous Symbols and Arrows (pdf)
A015 &#40981; YI SYLLABLE WU YI SYLLABLE ITERATION MARK ※ Correction Yi Syllables (pdf)
AA6E &#43630; MYANMAR LETTER KHAMTI HHA MYANMAR LETTER KHAMTI LLA ※ Correction Myanmar Extended-A (pdf)
FE00
...
FE0F
&#65024;
...
&#65039;
VARIATION SELECTOR-1
...
VARIATION SELECTOR-16
VS1
...
VS16
Abbreviation Variation Selectors (pdf)
(16 code points)
Abbreviation
FE18 &#65048; PRESENTATION FORM FOR VERTICAL RIGHT WHITE LENTICULAR BRAKCET PRESENTATION FORM FOR VERTICAL RIGHT WHITE LENTICULAR BRACKET ※ Correction Vertical Forms (pdf)
FEFF &#65279; ZERO WIDTH NO-BREAK SPACE
BOM
BYTE ORDER MARK Alternate Arabic Presentation Forms-B (pdf)
ZWNBSP
Abbreviation
122D4 &#74452; CUNEIFORM SIGN SHIR TENU CUNEIFORM SIGN NU11 TENU ※ Correction Cuneiform (pdf)
122D5 &#74453; CUNEIFORM SIGN SHIR OVER SHIR BUR OVER BUR CUNEIFORM SIGN NU11 OVER NU11 BUR OVER BUR ※ Correction Cuneiform (pdf)
16E56 &#93782; MEDEFAIDRIN CAPITAL LETTER HP MEDEFAIDRIN CAPITAL LETTER H ※ Correction Medefaidrin (pdf)
16E57 &#93783; MEDEFAIDRIN CAPITAL LETTER NY MEDEFAIDRIN CAPITAL LETTER NG ※ Correction Medefaidrin (pdf)
16E76 &#93814; MEDEFAIDRIN SMALL LETTER HP MEDEFAIDRIN SMALL LETTER H ※ Correction Medefaidrin (pdf)
16E77 &#93815; MEDEFAIDRIN SMALL LETTER NY MEDEFAIDRIN SMALL LETTER NG ※ Correction Medefaidrin (pdf)
1B001 &#110593; HIRAGANA LETTER ARCHAIC YE HENTAIGANA LETTER E-1 ※ Correction Kana Supplement (pdf)
1D0C5 &#118981; BYZANTINE MUSICAL SYMBOL FHTORA SKLIRON CHROMA VASIS BYZANTINE MUSICAL SYMBOL FTHORA SKLIRON CHROMA VASIS ※ Correction Byzantine Musical Symbols (pdf)
E0100
...
E01EF
&#917760;
...
&#917999;
VARIATION SELECTOR-17
...
VARIATION SELECTOR-1256
VS17
...
VS256
Abbreviation Variation Selectors Supplement (pdf)
(240 code points)
Abbreviation


See also[edit]

References[edit]

  1. ^ a b "NameAliases-14.0.0.txt". The Unicode Consortium. 2020-10-21. Retrieved 2021-09-14.
  2. ^ The Unicode Standard (PDF). 14.0.0. The Unicode Consortium. 2021. ISBN 978-1-936213-29-0.