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* 仕様書

[REFS[
- [4] [CITE@en[CSS Writing Modes Level 4]], [TIME[2020-09-05T23:08:25.000Z]], [TIME[2020-09-06T01:40:03.952Z]] <https://drafts.csswg.org/css-writing-modes/#propdef-unicode-bidi>
]REFS]

* 歴史

[1]  
[[メイル・アドレス]]収集[[ロボット]]の対策で、
[[文書]]では[[メイル・アドレス]]を逆順に記述し、
[[CSS]]で[[表示順]]を入れ替えるのをすすめている人がいます。

;; [CITE[unicode-bidiでSPAM対策 - bnote]] 
<http://www.bnote.net/css/tips_hidingemailaddr.html>

もちろん、このような[[CSS]][[特性]]の濫用は悪いことです。

[2] [CITE[Bug 10815 – i18n comment 10 : block elements with display:inline should get ubi instead of default dir]]
( ([TIME[2010-10-15 22:43:43 +09:00]] 版))
<http://www.w3.org/Bugs/Public/show_bug.cgi?id=10815>

[3] [CITE@en[CSS Writing Modes Level 4]]
([TIME[2019-02-01 10:07:02 +09:00]])
<https://drafts.csswg.org/css-writing-modes/#propdef-unicode-bidi>

[6] [CITE@en-us[Timed Text Markup Language 1 (TTML1) (Third Edition)]], [TIME[2020-08-20T18:38:18.000Z]], [TIME[2020-10-23T14:35:35.235Z]] <https://www.w3.org/TR/ttml1/#style-attribute-unicodeBidi>

[5] [CITE@en-us[Timed Text Markup Language 2 (TTML2) (2nd Edition)]], [TIME[2020-07-28T01:59:54.000Z]], [TIME[2020-10-23T14:33:53.318Z]] <https://w3c.github.io/ttml2/#style-attribute-unicodeBidi>

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