* 仕様書

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

* 例

[2] [CODE(HTTP)@en[[[Accept-Language:]]]] 欄