| 版本 | 最终码位[a] | 码位数 | L2 ID | WG2 ID | 文档 | 
| 1.1 | U+FE20..FE23 | 4 |  |  | (待考) | 
| 5.1 | U+FE24..FE26 | 3 | L2/07-085R | N3222R (页面存档备份,存于互联网档案馆) | Everson, Michael; Emmel, Stephen; Marjanen, Antti; Dunderberg, Ismo; Baines, John; Pedro, Susana; Emiliano, António, Proposal to add additional characters for Coptic and Latin in the UCS, 2007-03-15 | 
| L2/07-150 |  | Whistler, Ken, G, WG2 Consent Docket, 2007-05-10 | 
| 7.0 | U+FE27..FE2D | 7 | L2/08-392 |  | Pentzlin, Karl, Proposal to encode a combining diacritical mark for Low German dialect writing, 2008-10-25 | 
| L2/09-028 | N3571 (页面存档备份,存于互联网档案馆) | Ruppel, Klaas; Aalto, Tero; Everson, Michael, Proposal to encode additional characters for the Uralic Phonetic Alphabet, 2009-01-27 | 
| L2/09-281 |  | Anderson, Deborah, COMBINING TRIPLE INVERTED BREVE and other triple-length combining marks, 2009-08-06 | 
| L2/10-353 | N3915 (页面存档备份,存于互联网档案馆) | Pentzlin, Karl, Preliminary Proposal to enable the use of Combining Triple Diacritics in Plain Text, 2010-09-23 | 
| L2/11-224 | N4078 (页面存档备份,存于互联网档案馆) | Proposal to enable the use of Combining Triple Diacritics in Plain Text, 2011-05-22 | 
| L2/11-296R | N4131 (页面存档备份,存于互联网档案馆) | Everson, Michael, Proposal for encoding the Caucasian Albanian script in the SMP of the UCS, 2011-10-28 | 
|  | N4243 (页面存档备份,存于互联网档案馆) | Everson, Michael; Gippert, Jost, Documentation for Two Characters FE2B and FE2C for Caucasian Albanian (N4131R), 2012-02-14 | 
| L2/12-098 | N4254 (页面存档备份,存于互联网档案馆) | M59.01 e, WG2 Resolutions, 2012-02-17 | 
| L2/12-112 |  | Moore, Lisa, 131-C22, UTC #131 / L2 #228 Minutes, 2012-05-17 | 
| 8.0 | U+FE2E..FE2F | 2 | L2/13-164 |  | Cleminson, Ralph; Birnbaum, David, Feedback from Experts on Cyrillic proposals, 2013-07-25 | 
| L2/13-139 | N4475 (页面存档备份,存于互联网档案馆) | Andreev, Aleksandr; Shardt, Yuri; Simmons, Nikita, Proposal to Encode Combining Half Marks Used for Cyrillic Supralineation in Unicode, 2013-08-07 | 
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