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Combining Diacritical Marks for Symbols

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For a list of all mathematical symbols encoded in Unicode, see Mathematical operators and symbols in Unicode.
Unicode character block
Combining Diacritical Marks for Symbols
RangeU+20D0..U+20FF
(48 code points)
PlaneBMP
ScriptsInherited
Assigned33 code points
Unused15 reserved code points
Unicode version history
1.0.0 (1991)18 (+18)
3.0 (1999)20 (+2)
3.2 (2002)27 (+7)
4.1 (2005)28 (+1)
5.0 (2006)32 (+4)
5.1 (2008)33 (+1)
Unicode documentation
Code chart ∣ Web page
Note: [1] [2]

Combining Diacritical Marks for Symbols is a Unicode block containing arrows, dots, enclosures, and overlays for modifying symbol characters.

Its block name in Unicode 1.0 was simply Diacritical Marks for Symbols.[3]

Block

[edit ]
Combining Diacritical Marks for Symbols [1] [2]
Official Unicode Consortium code chart (PDF)
  0 1 2 3 4 5 6 7 8 9 A B C D E F
U+20Dx ◌⃐ ◌⃑ ◌⃒ ◌⃓ ◌⃔ ◌⃕ ◌⃖ ◌⃗ ◌⃘ ◌⃙ ◌⃚ ◌⃛ ◌⃜ ◌⃝ ◌⃞ ◌⃟
U+20Ex ◌⃠ ◌⃡ ◌⃢ ◌⃣ ◌⃤ ◌⃥ ◌⃦ ◌⃧ ◌⃨ ◌⃩ ◌⃪ ◌⃫ ◌⃬ ◌⃭ ◌⃮ ◌⃯
U+20Fx ◌⃰
Notes
1.^ As of Unicode version 16.0
2.^ Grey areas indicate non-assigned code points

History

[edit ]

The following Unicode-related documents record the purpose and process of defining specific characters in the Combining Diacritical Marks for Symbols block:

Version Final code points[a] Count L2 ID WG2 ID Document
1.0.0 U+20D0..20E1 18 (to be determined)
L2/06-181 Anderson, Deborah (2006年05月08日), "2", Responses to the UTC regarding L2/06-042, Proposal for Additional Cyrillic Characters, Please add an annotation to U+20DD saying that it can be used as the Cyrillic ten thousands sign
L2/06-108 Moore, Lisa (2006年05月25日), "Action item 107-A94", UTC #107 Minutes, Add an annotation to the names list for U+20DD COMBINING ENCLOSING CIRCLE.
3.0 U+20E2..20E3 2 L2/97-206 N1668 Proposal to encode two symbols, 1997年08月05日
L2/98-007 N1668R (pdf) Joint proposal to encode two symbols, 1998年02月13日
L2/98-039 Aliprand, Joan; Winkler, Arnold (1998年02月24日), "3.C.3. Cartouche proposal for keyboard symbols", Preliminary Minutes - UTC #74 & L2 #171, Mountain View, CA - December 5, 1997
L2/98-082 N1668R (doc) Joint proposal to encode enclosing screen and keycap, 1998年03月23日
L2/98-286 N1703 Umamaheswaran, V. S.; Ksar, Mike (1998年07月02日), "8.4", Unconfirmed Meeting Minutes, WG 2 Meeting #34, Redmond, WA, USA; 1998年03月16日--20
L2/98-321 N1905 Revised text of 10646-1/FPDAM 23, AMENDMENT 23: Bopomofo Extended and other characters, 1998年10月22日
L2/99-010 N1903 (pdf, html, doc) Umamaheswaran, V. S. (1998年12月30日), "6.7.6", Minutes of WG 2 meeting 35, London, U.K.; 1998年09月21日--25
L2/17-086 Burge, Jeremy; et al. (2017年03月27日), Add ZWJ, VS-16, Keycaps & Tags to Emoji_Component
L2/17-103 Moore, Lisa (2017年05月18日), "E.1.7 Add ZWJ, VS-16, Keycaps & Tags to Emoji_Component", UTC #151 Minutes
3.2 U+20E4 1 L2/98-056 McGowan, Rick; Sampson, Geoffrey (1998年02月23日), Triangular Overlay Character
L2/98-070 Aliprand, Joan; Winkler, Arnold, "4.C.1.", Minutes of the joint UTC and L2 meeting from the meeting in Cupertino, February 25-27, 1998
L2/99-021 N1941 McGowan, Rick (1998年12月07日), Request for Addition of Triangular Overlay Character
L2/99-077.1 N1975 Irish Comments on SC 2 N 3210, 1999年01月20日
L2/98-419 (pdf, doc) Aliprand, Joan (1999年02月05日), "Enclosing Triangle", Approved Minutes -- UTC #78 & NCITS Subgroup L2 # 175 Joint Meeting, San Jose, CA -- December 1-4, 1998
L2/99-176R Moore, Lisa (1999年11月04日), "Motion 80-M20", Minutes from the joint UTC/L2 meeting in Seattle, June 8-10, 1999
L2/99-232 N2003 Umamaheswaran, V. S. (1999年08月03日), "7.2.1.2", Minutes of WG 2 meeting 36, Fukuoka, Japan, 1999年03月09日--15
U+20E5..20E8 4 L2/00-119 [b] N2191R Whistler, Ken; Freytag, Asmus (2000年04月19日), Encoding Additional Mathematical Symbols in Unicode
L2/00-234 N2203 (rtf, txt) Umamaheswaran, V. S. (2000年07月21日), "8.18", Minutes from the SC2/WG2 meeting in Beijing, 2000年03月21日 -- 24
L2/00-115R2 Moore, Lisa (2000年08月08日), "Motion 83-M11", Minutes Of UTC Meeting #83
U+20E9..20EA 2 L2/99-010 N1903 (pdf, html, doc) Umamaheswaran, V. S. (1998年12月30日), "6.7.6", Minutes of WG 2 meeting 35, London, U.K.; 1998年09月21日--25
L2/01-142 [b] N2336 Beeton, Barbara; Freytag, Asmus; Ion, Patrick (2001年04月02日), Additional Mathematical Symbols
L2/01-156 N2356 Freytag, Asmus (2001年04月03日), Additional Mathematical Characters (Draft 10)
L2/01-344 N2353 (pdf, doc) Umamaheswaran, V. S. (2001年09月09日), "7.7 Mathematical Symbols", Minutes from SC2/WG2 meeting #40 -- Mountain View, April 2001
4.1 U+20EB 1 L2/03-194 N2590 Freytag, Asmus (2003年06月09日), Additional Mathematical and Letterlike Characters
L2/04-196 N2653 (pdf, doc) Umamaheswaran, V. S. (2004年06月04日), "RESOLUTION M44.5 (Additions of individual characters), item g", Unconfirmed minutes of WG 2 meeting 44
5.0 U+20EC..20EF 4 L2/04-406 Freytag, Asmus; Sargent, Murray; Beeton, Barbara; Carlisle, David (2004年11月15日), Progress report on Mathematical Symbols
L2/04-410 Freytag, Asmus (2004年11月18日), Twenty six mathematical characters
5.1 U+20F0 1 L2/07-011R N3198R Freytag, Asmus; Beeton, Barbara; Ion, Patrick; Sargent, Murray; Carlisle, David; Pournader, Roozbeh (2007年01月15日), 29 Additional Mathematical and Symbol Characters
L2/07-015 Moore, Lisa (2007年02月08日), "Mathematical Characters and Symbols (C.4)", UTC #110 Minutes
L2/07-268 N3253 (pdf, doc) Umamaheswaran, V. S. (2007年07月26日), "M50.16", Unconfirmed minutes of WG 2 meeting 50, Frankfurt-am-Main, Germany; 2007年04月24日/27
  1. ^ Proposed code points and characters names may differ from final code points and names
  2. ^ a b Refer to the history section of the Miscellaneous Mathematical Symbols-B block for additional math-related documents

References

[edit ]
  1. ^ "Unicode character database". The Unicode Standard. Retrieved 2023年07月26日.
  2. ^ "Enumerated Versions of The Unicode Standard". The Unicode Standard. Retrieved 2023年07月26日.
  3. ^ "3.8: Block-by-Block Charts" (PDF). The Unicode Standard. version 1.0. Unicode Consortium.

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