[1] RFC 5988 - Web Linking ( ( 版)) <http://tools.ietf.org/html/rfc5988#page-16>
[2] RFC 5829 - Link Relation Types for Simple Version Navigation between Web Resources ( 版) <http://tools.ietf.org/html/rfc5829#section-4.1>
[3] RFC 5829 - Link Relation Types for Simple Version Navigation between Web Resources ( 版) <http://tools.ietf.org/html/rfc5829#appendix-A>
[4] RFC 3253 - Versioning Extensions to WebDAV (Web Distributed Authoring and Versioning) ( 版) <http://tools.ietf.org/html/rfc3253#page-9>