歴史

[7] [css3 writing modes] text orientation discussion, John Daggett, 2011-07-24 16:15:19 +09:00, 2020-01-17T22:50:03.000Z, 2020-10-31T03:52:21.225Z https://lists.w3.org/Archives/Public/www-style/2011Jul/0402.html
[6] Strawman proposal for UTR #50: Unicode Properties for Vertical Text Layout, Eric Muller, 2011-09-01 12:25:29 +09:00, 2020-01-17T22:50:06.000Z, 2020-10-31T03:25:48.459Z https://lists.w3.org/Archives/Public/www-style/2011Sep/0003.html
[4] UTR #50: Unicode Properties for Vertical Text Layout, 2011-10-04, 2011-10-04T14:02:12.000Z, 2020-10-29T09:27:45.992Z https://www.unicode.org/reports/tr50/tr50-1.html

[5] CSS 関係者からの要望 CSS Writing Modes

[8] 21222-uax50-harmony.pdf, 2021-10-01T14:46:54.000Z, 2021-10-08T14:45:17.869Z https://www.unicode.org/L2/L2021/21222-uax50-harmony.pdf

[9] UAX #50 をそのまま実装してもまともに縦書きできる気がしないんだよなあ、不思議だなあ

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