Note: [1][2] This range was initially part of the Private Use Area in Unicode 1.0.0,[3] and removed from it in Unicode 1.0.1.[4]
Arabic Presentation Forms-A is a Unicode block encoding contextual forms and ligatures of letter variants needed for Persian, Urdu, Sindhi and Central Asian languages. This block also allocates 32 noncharacters in Unicode, designed specifically for internal use.
The presentation forms are present only for compatibility with older standards such as codepage 864 used in DOS, and are typically used in visual and not logical order.[5] It has been agreed no further presentation forms will be encoded; though the block still sees further encodings including a contiguous range of 32 noncharacters. [6]
Moore, Lisa (2006-02-13), "Motion 106-M3", UTC #106 Minutes, Drop U+FD3E ORNATE LEFT PARENTHESIS and U+FD3F ORNATE RIGHT PARENTHESIS from the list of characters with Bidi Mirrored property proposed in Public Review Issue 80.
Moore, Lisa (2014-02-17), "Consensus 138-C21", UTC #138 Minutes, Change the General Category and linebreak properties of U+FD3E LEFT ORNATE PARENTHESIS to gc=Pe and lb=CL; and change General Category and linebreak properties of U+FD3F RIGHT ORNATE PARENTHESIS to gc=Ps and lb=OP, in Unicode 7.0.
Evans, Lorna Priest (2020-12-07), Request for glyph changes and annotations for Kazakh, Kyrgyz, and Uyghur [Affects U+FBD7-FBD8, U+FBDD, and U+FBE0-FBE1]
Anderson, Deborah; Whistler, Ken; Pournader, Roozbeh; Moore, Lisa; Liang, Hai (2021-01-14), "11a. Glyph changes and annotations for Kazakh, Kyrgyz, and Uyghur", Recommendations to UTC #166 January 2021 on Script Proposals
Umamaheswaran, V. S. (2001-01-21), "7.20 Proposal for Reserved Positions for Processing Purposes", Minutes of the SC2/WG2 meeting in Athens, September 2000
Anderson, Deborah; Whistler, Ken; Pournader, Roozbeh; Moore, Lisa; Liang, Hai (2019-10-06), "a. Additions for Quranic orthographiesFD4C:c. Arabic honorifics", Recommendations to UTC #161 October 2019 on Script Proposals
Anderson, Deborah; Whistler, Ken; Pournader, Roozbeh; Moore, Lisa; Constable, Peter; Liang, Hai (2020-04-20), "3f. Comments on L2/19-306", Recommendations to UTC #163 April 2020 on Script Proposals
Anderson, Deborah; Whistler, Ken; Pournader, Roozbeh; Moore, Lisa; Constable, Peter; Liang, Hai (2020-04-20), "3a. Arabic Honorific", Recommendations to UTC #163 April 2020 on Script Proposals