UTS #22, "Unicode Character Mapping Markup Language" has been stabilized: There are no plans to ever publish another update for it.
[2] UTS #22: CharMapML (2017-06-01 07:35:01 +09:00) http://www.unicode.org/reports/tr22/tr22-8.html
[3] Microsoft Word - Beyond UTR22.doc - BeyondUTR22_pdf.pdf, 2021-07-14T15:18:35.000Z, 2022-11-26T07:55:54.501Z https://software.sil.org/downloads/r/teckit/BeyondUTR22_pdf.pdf