[1] Voice Browser Call Control: CCXML Version 1.0 ( (2011-06-28 19:48:47 +09:00 版)) http://www.w3.org/TR/ccxml/

[2] Multimodal Architecture and Interfaces (2017-10-02 19:45:16 +09:00) https://www.w3.org/TR/2012/REC-mmi-arch-20121025/

[3] Authoring Applications for the Multimodal Architecture (2017-10-02 19:35:27 +09:00) https://www.w3.org/TR/2008/NOTE-mmi-auth-20080702/