仕様書

[3] RFC 7230 - Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing (2014-09-11 10:00:03 +09:00 版) https://tools.ietf.org/html/rfc7230#section-3.2.6
[2] RFC 7230 - Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing (2014-09-11 10:00:03 +09:00 版) https://tools.ietf.org/html/rfc7230#section-1.2
[4] RFC 7230 - Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing (2014-09-11 10:00:03 +09:00 版) https://tools.ietf.org/html/rfc7230#page-26

メモ

[1] Character set "$rfc7230:obs-text" ( (2014-09-14 13:13:09 +09:00 版)) http://chars.suikawiki.org/set/%24rfc7230%3Aobs-text