仕様書

[1] RFC 4647 - Matching of Language Tags (2011-06-26 10:41:18 +09:00 版) http://tools.ietf.org/html/rfc4647#section-2.3

濾過演算

[3]

http://tools.ietf.org/html/rfc4647#section-3.3.1

[4]

http://tools.ietf.org/html/rfc4647#section-3.3.2

[5]

http://tools.ietf.org/html/rfc4647#section-3.4

[2] Accept-Language: 欄