[1] RFC 5988 - Web Linking ( ( 版)) <http://tools.ietf.org/html/rfc5988#page-14>
[2] RFC 5829 - Link Relation Types for Simple Version Navigation between Web Resources ( 版) <http://tools.ietf.org/html/rfc5829#section-4.5>
[4] RFC 3253 - Versioning Extensions to WebDAV (Web Distributed Authoring and Versioning) ( 版) <http://tools.ietf.org/html/rfc3253#page-9>
[5] RFC 5829 - Link Relation Types for Simple Version Navigation between Web Resources ( 版) <http://tools.ietf.org/html/rfc5829#section-2>
When a versioned resource is checked out and then subsequently checked in, the version that was checked out becomes a "predecessor" of the version created by the checkin. A client can specify multiple predecessors for a new version if the new version is logically a merge of those predecessors. The inverse of the predecessor relation is the "successor" relation. Therefore, if X is a predecessor of Y, then Y is a successor of X.
[6] RFC 5829 - Link Relation Types for Simple Version Navigation between Web Resources ( 版) <http://tools.ietf.org/html/rfc5829#section-3.5>
[3] RFC 5829 - Link Relation Types for Simple Version Navigation between Web Resources ( 版) <http://tools.ietf.org/html/rfc5829#appendix-A>