[1] Web Applications 1.0 r6357 Try to make <a rel=help> more useful. ( (2011-08-03 16:04:00 +09:00 版)) http://html5.org/tools/web-apps-tracker?from=6356&to=6357

[2] Removing or keeping <link>-ed rel=help as test requirement (issue 1730) (Gérard Talbot著, 2017-09-02 05:52:56 +09:00) https://lists.w3.org/Archives/Public/www-style/2017Sep/0004.html

[3] Remove help cursor from user-agent stylesheet (domenic著, 2018-08-11 07:37:15 +09:00) https://github.com/whatwg/html/commit/ea3cde3cba3a255e02bd73ef1036f1d2027c400d

[4] Remove help cursor from user-agent stylesheet by domenic · Pull Request #3902 · whatwg/html (2018-08-14 23:24:30 +09:00) https://github.com/whatwg/html/pull/3902