[1] ACTION-1680: Modified aria-errormessage based on 16 Jul 2015 telecon. · w3c/aria@c50aa77 (2015-07-23 15:14:36 +09:00 版) https://github.com/w3c/aria/commit/c50aa777486915e4eca846a99c6fd5f325ba6023

[2] ACTION-1680: Modified aria-errormessage based on 23 Jul 2015 telecon. · w3c/aria@5552305 (2015-07-24 23:03:35 +09:00 版) https://github.com/w3c/aria/commit/55523058a01da54656940f78e807eb4dd66a8b50