[1] [CITE@en[draft-murchison-webdav-prefer-07 - Use of the Prefer Header Field in Web Distributed Authoring and Versioning (WebDAV)]]
( ([TIME[2014-10-16 14:20:11 +09:00]] 版))
<http://tools.ietf.org/html/draft-murchison-webdav-prefer-07#section-4>

[2] [CITE@en[RFC 8144 - Use of the Prefer Header Field in Web Distributed Authoring and Versioning (WebDAV)]]
([TIME[2017-04-19 23:22:44 +09:00]])
<https://tools.ietf.org/html/rfc8144>