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xCal: The XML Format for iCalendar
RFC 6321

Document type: RFC - Proposed Standard (August 2011; Errata)
Updated by RFC 6868
Was draft-daboo-et-al-icalendar-in-xml (individual in app area)
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 6321 (Proposed Standard)
Responsible AD: Peter Saint-Andre
Send notices to: cyrus@daboo.name, douglm@rpi.edu, Steven.Lees@microsoft.com, draft-daboo-et-al-icalendar-in-xml@tools.ietf.org

Internet Engineering Task Force (IETF)                          C. Daboo
Request for Comments: 6321                                   Apple, Inc.
Category: Standards Track                                    M. Douglass
ISSN: 2070-1721                                                      RPI
                                                                 S. Lees
                                                               Microsoft
                                                             August 2011

                   xCal: The XML Format for iCalendar

Abstract

   This specification defines "xCal", an XML format for iCalendar data.

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/rfc6321.

Copyright Notice

   Copyright (c) 2011 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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Daboo, et al.                Standards Track                    [Page 1]
RFC 6321                          xCal                       August 2011

Table of Contents

   1. Introduction ....................................................3
   2. Conventions Used in This Document ...............................4
   3. Converting from iCalendar to xCal ...............................4
      3.1. Pre-Processing .............................................4
      3.2. iCalendar Stream (RFC 5545, Section 3.4) ...................5
      3.3. Components (RFC 5545, Section 3.6) .........................6
      3.4. Properties (RFC 5545, Sections 3.7 and 3.8) ................6
           3.4.1. Special Cases for Properties ........................8
                  3.4.1.1. Multi-Valued Properties ....................8
                  3.4.1.2. GEO Property ...............................9
                  3.4.1.3. REQUEST-STATUS Property ....................9
      3.5. Parameters (RFC 5545, Section 3.2) ........................10
           3.5.1. VALUE Parameter ....................................11
      3.6. Values (RFC 5545, Section 3.3) ............................11
           3.6.1. Binary (RFC 5545, Section 3.3.1) ...................12
           3.6.2. Boolean  (RFC 5545, Section 3.3.2) .................12
           3.6.3. Calendar User Address (RFC 5545, Section 3.3.3) ....12
           3.6.4. Date (RFC 5545, Section 3.3.4) .....................12
           3.6.5. Date-Time (RFC 5545, Section 3.3.5) ................13
           3.6.6. Duration (RFC 5545, Section 3.3.6) .................13
           3.6.7. Float (RFC 5545, Section 3.3.7) ....................13
           3.6.8. Integer (RFC 5545, Section 3.3.8) ..................14
           3.6.9. Period of Time (RFC 5545, Section 3.3.9) ...........14
           3.6.10. Recurrence Rule (RFC 5545, Section 3.3.10) ........14
           3.6.11. Text (RFC 5545, Section 3.3.11) ...................15
           3.6.12. Time (RFC 5545, Section 3.3.12) ...................15
           3.6.13. URI (RFC 5545, Section 3.3.13) ....................15
           3.6.14. UTC Offset (RFC 5545, Section 3.3.14) .............16
      3.7. Extensions ................................................16
   4. Converting from xCal into iCalendar ............................16
      4.1. Converting XML Extensions into iCalendar ..................16
      4.2. The XML Property for iCalendar ............................17
   5. Handling Unrecognized Properties or Parameters .................18
   6. Security Considerations ........................................19
   7. IANA Considerations ............................................20
      7.1. Namespace Registration ....................................20
      7.2. Media Type ................................................20
      7.3. iCalendar Property Registrations ..........................21

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