# Combining Diacritical Marks for Symbols

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.

## Block

Combining Diacritical Marks for Symbols 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

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 | Count | L2 ID | WG2 ID | Document |
| 1.0.0 | U+20D0..20E1 | 18 | | | (to be determined) |
| 1.0.0 | U+20D0..20E1 | 18 | L2/06-181 | | Anderson, Deborah (2006-05-08), "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 |
| 1.0.0 | U+20D0..20E1 | 18 | L2/06-108 | | Moore, Lisa (2006-05-25), "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, 1997-08-05 |
| 3.0 | U+20E2..20E3 | 2 | L2/98-007 | N1668R (pdf) | Joint proposal to encode two symbols, 1998-02-13 |
| 3.0 | U+20E2..20E3 | 2 | L2/98-039 | | Aliprand, Joan; Winkler, Arnold (1998-02-24), "3.C.3. Cartouche proposal for keyboard symbols", Preliminary Minutes - UTC #74 & L2 #171, Mountain View, CA - December 5, 1997 |
| 3.0 | U+20E2..20E3 | 2 | L2/98-082 | N1668R (doc) | Joint proposal to encode enclosing screen and keycap, 1998-03-23 |
| 3.0 | U+20E2..20E3 | 2 | L2/98-286 | N1703 | Umamaheswaran, V. S.; Ksar, Mike (1998-07-02), "8.4", Unconfirmed Meeting Minutes, WG 2 Meeting #34, Redmond, WA, USA; 1998-03-16--20 |
| 3.0 | U+20E2..20E3 | 2 | L2/98-321 | N1905 | Revised text of 10646-1/FPDAM 23, AMENDMENT 23: Bopomofo Extended and other characters, 1998-10-22 |
| 3.0 | U+20E2..20E3 | 2 | L2/99-010 | N1903 (pdf, html, doc) | Umamaheswaran, V. S. (1998-12-30), "6.7.6", Minutes of WG 2 meeting 35, London, U.K.; 1998-09-21--25 |
| 3.0 | U+20E2..20E3 | 2 | L2/17-086 | | Burge, Jeremy; et al. (2017-03-27), Add ZWJ, VS-16, Keycaps & Tags to Emoji_Component |
| 3.0 | U+20E2..20E3 | 2 | L2/17-103 | | Moore, Lisa (2017-05-18), "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 (1998-02-23), Triangular Overlay Character |
| 3.2 | U+20E4 | 1 | 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 |
| 3.2 | U+20E4 | 1 | L2/99-021 | N1941 | McGowan, Rick (1998-12-07), Request for Addition of Triangular Overlay Character |
| 3.2 | U+20E4 | 1 | L2/99-077.1 | N1975 | Irish Comments on SC 2 N 3210, 1999-01-20 |
| 3.2 | U+20E4 | 1 | L2/98-419 (pdf, doc) | | Aliprand, Joan (1999-02-05), "Enclosing Triangle", Approved Minutes -- UTC #78 & NCITS Subgroup L2 # 175 Joint Meeting, San Jose, CA -- December 1-4, 1998 |
| 3.2 | U+20E4 | 1 | L2/99-176R | | Moore, Lisa (1999-11-04), "Motion 80-M20", Minutes from the joint UTC/L2 meeting in Seattle, June 8-10, 1999 |
| 3.2 | U+20E4 | 1 | L2/99-232 | N2003 | Umamaheswaran, V. S. (1999-08-03), "7.2.1.2", Minutes of WG 2 meeting 36, Fukuoka, Japan, 1999-03-09--15 |
| 3.2 | U+20E5..20E8 | 4 | L2/00-119 | N2191R | Whistler, Ken; Freytag, Asmus (2000-04-19), Encoding Additional Mathematical Symbols in Unicode |
| 3.2 | U+20E5..20E8 | 4 | L2/00-234 | N2203 (rtf, txt) | Umamaheswaran, V. S. (2000-07-21), "8.18", Minutes from the SC2/WG2 meeting in Beijing, 2000-03-21 -- 24 |
| 3.2 | U+20E5..20E8 | 4 | L2/00-115R2 | | Moore, Lisa (2000-08-08), "Motion 83-M11", Minutes Of UTC Meeting #83 |
| 3.2 | U+20E9..20EA | 2 | L2/99-010 | N1903 (pdf, html, doc) | Umamaheswaran, V. S. (1998-12-30), "6.7.6", Minutes of WG 2 meeting 35, London, U.K.; 1998-09-21--25 |
| 3.2 | U+20E9..20EA | 2 | L2/01-142 | N2336 | Beeton, Barbara; Freytag, Asmus; Ion, Patrick (2001-04-02), Additional Mathematical Symbols |
| 3.2 | U+20E9..20EA | 2 | L2/01-156 | N2356 | Freytag, Asmus (2001-04-03), Additional Mathematical Characters (Draft 10) |
| 3.2 | U+20E9..20EA | 2 | L2/01-344 | N2353 (pdf, doc) | Umamaheswaran, V. S. (2001-09-09), "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 (2003-06-09), Additional Mathematical and Letterlike Characters |
| 4.1 | U+20EB | 1 | L2/04-196 | N2653 (pdf, doc) | Umamaheswaran, V. S. (2004-06-04), "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 (2004-11-15), Progress report on Mathematical Symbols |
| 5.0 | U+20EC..20EF | 4 | L2/04-410 | | Freytag, Asmus (2004-11-18), 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 (2007-01-15), 29 Additional Mathematical and Symbol Characters |
| 5.1 | U+20F0 | 1 | L2/07-015 | | Moore, Lisa (2007-02-08), "Mathematical Characters and Symbols (C.4)", UTC #110 Minutes |
| 5.1 | U+20F0 | 1 | L2/07-268 | N3253 (pdf, doc) | Umamaheswaran, V. S. (2007-07-26), "M50.16", Unconfirmed minutes of WG 2 meeting 50, Frankfurt-am-Main, Germany; 2007-04-24/27 |
| ↑ Proposed code points and characters names may differ from final code points and names 1 2 Refer to the history section of the Miscellaneous Mathematical Symbols-B block for additional math-related documents ||||||