[1] RFC 4975 - The Message Session Relay Protocol (MSRP) ( (2012-02-26 13:20:50 +09:00 版)) http://tools.ietf.org/html/rfc4975

[2] RFC 4976 - Relay Extensions for the Message Sessions Relay Protocol (MSRP) ( (2014-10-18 23:44:47 +09:00 版)) https://tools.ietf.org/html/rfc4976

[3] RFC 7977 - The WebSocket Protocol as a Transport for the Message Session Relay Protocol (MSRP) (2016-10-04 23:50:28 +09:00) https://tools.ietf.org/html/rfc7977