Collection Synchronization for Web Distributed Authoring and Versioning (WebDAV)
RFC 6578

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Internet Engineering Task Force (IETF)                          C. Daboo
Request for Comments: 6578                                    Apple Inc.
Category: Standards Track                                    A. Quillaud
ISSN: 2070-1721                                                   Oracle
                                                              March 2012

                       Collection Synchronization
         for Web Distributed Authoring and Versioning (WebDAV)

Abstract

   This specification defines an extension to Web Distributed Authoring
   and Versioning (WebDAV) that allows efficient synchronization of the
   contents of a WebDAV collection.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6578.

Daboo & Quillaud             Standards Track                    [Page 1]
RFC 6578                       WebDAV Sync                    March 2012

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
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   publication of this document.  Please review these documents
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   described in the Simplified BSD License.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Daboo & Quillaud             Standards Track                    [Page 2]
RFC 6578                       WebDAV Sync                    March 2012

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Conventions Used in This Document  . . . . . . . . . . . . . .  4
   3.  WebDAV Synchronization . . . . . . . . . . . . . . . . . . . .  5
     3.1.  Overview . . . . . . . . . . . . . . . . . . . . . . . . .  5
     3.2.  DAV:sync-collection Report . . . . . . . . . . . . . . . .  6
     3.3.  Depth Behavior . . . . . . . . . . . . . . . . . . . . . .  8
     3.4.  Types of Changes Reported on Initial Synchronization . . .  9
     3.5.  Types of Changes Reported on Subsequent
           Synchronizations . . . . . . . . . . . . . . . . . . . . . 10
       3.5.1.  Changed Member . . . . . . . . . . . . . . . . . . . . 10
       3.5.2.  Removed Member . . . . . . . . . . . . . . . . . . . . 10
     3.6.  Truncation of Results  . . . . . . . . . . . . . . . . . . 11
     3.7.  Limiting Results . . . . . . . . . . . . . . . . . . . . . 12
     3.8.  Example: Initial DAV:sync-collection Report  . . . . . . . 12
     3.9.  Example: DAV:sync-collection Report with Token . . . . . . 14
     3.10. Example: Initial DAV:sync-collection Report with
           Truncation . . . . . . . . . . . . . . . . . . . . . . . . 16
     3.11. Example: Initial DAV:sync-collection Report with Limit . . 17
     3.12. Example: DAV:sync-collection Report with Unsupported
           Limit  . . . . . . . . . . . . . . . . . . . . . . . . . . 18
     3.13. Example: DAV:sync-level Set to Infinite, Initial
           DAV:sync-collection Report . . . . . . . . . . . . . . . . 19
   4.  DAV:sync-token Property  . . . . . . . . . . . . . . . . . . . 22
   5.  DAV:sync-token Use with If Header  . . . . . . . . . . . . . . 22
     5.1.  Example: If Precondition with PUT  . . . . . . . . . . . . 22
     5.2.  Example: If Precondition with MKCOL  . . . . . . . . . . . 23
   6.  XML Element Definitions  . . . . . . . . . . . . . . . . . . . 24
     6.1.  DAV:sync-collection XML Element  . . . . . . . . . . . . . 24