http://www.rfc-editor.org/rfc/rfc6578.txt
RFC 6578: Collection Synchronization for Web Distributed Authoring and Versioning (WebDAV), C. Daboo, A. Quillaud2012-03-01T23:00:00-00:00This specification defines an extension to Web Distributed Authoring and Versioning (WebDAV) that allows efficient synchronization of the contents of a WebDAV collection. [STANDARDS-TRACK]