[1] Messaging API ( (2013-05-15 23:48:51 +09:00 版)) http://www.w3.org/TR/2013/WD-messaging-20130516/

[2] The Messaging API ( (2014-01-10 22:23:10 +09:00 版)) http://www.w3.org/TR/2014/NOTE-messaging-api-20140114/

[3] Messaging API (2015-06-02 01:19:18 +09:00 版) http://www.w3.org/TR/2015/NOTE-messaging-20150602/