Extensible Messaging and Presence Protocol (XMPP): Address Format
RFC 7622

Document Type RFC - Proposed Standard (September 2015; Errata)
Obsoletes RFC 6122
Last updated 2015-10-14
Replaces draft-saintandre-xmpp-6122bis
Stream IETF
Formats plain text pdf html bibtex
Stream WG state Submitted to IESG for Publication
Document shepherd Matthew Miller
Shepherd write-up Show (last changed 2015-04-30)
IESG IESG state RFC 7622 (Proposed Standard)
Consensus Yes
Telechat date
Responsible AD Ben Campbell
Send notices to (None)
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                    P. Saint-Andre
Request for Comments: 7622                                          &yet
Obsoletes: 6122                                           September 2015
Category: Standards Track
ISSN: 2070-1721

   Extensible Messaging and Presence Protocol (XMPP): Address Format

Abstract

   This document defines the address format for the Extensible Messaging
   and Presence Protocol (XMPP), including support for code points
   outside the ASCII range.  This document obsoletes RFC 6122.

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/rfc7622.

Copyright Notice

   Copyright (c) 2015 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.

Saint-Andre                  Standards Track                    [Page 1]
RFC 7622                   XMPP Address Format            September 2015

Table of Contents

   1. Introduction ....................................................2
   2. Terminology .....................................................3
   3. Addresses .......................................................3
      3.1. Fundamentals ...............................................3
      3.2. Domainpart .................................................5
      3.3. Localpart ..................................................7
      3.4. Resourcepart ...............................................8
      3.5. Examples ...................................................9
   4. Enforcement in JIDs and JID Parts ..............................13
   5. Internationalization Considerations ............................15
   6. IANA Considerations ............................................16
      6.1. Stringprep Profiles Registry ..............................16
   7. Security Considerations ........................................16
      7.1. Reuse of PRECIS ...........................................16
      7.2. Reuse of Unicode ..........................................16
      7.3. Address Spoofing ..........................................16
   8. Conformance Requirements .......................................19
   9. References .....................................................21
      9.1. Normative References ......................................21
      9.2. Informative References ....................................22
   Appendix A. Differences from RFC 6122 .............................26
   Acknowledgements ..................................................27
   Author's Address ..................................................27

1.  Introduction

   The Extensible Messaging and Presence Protocol (XMPP) [RFC6120] is an
   application profile of the Extensible Markup Language [XML] for
   streaming XML data in close to real time between any two or more
   network-aware entities.  The address format for XMPP entities was
   originally developed in the Jabber open-source community in 1999,
   first described by [XEP-0029] in 2002, and then defined canonically
   by [RFC3920] in 2004 and [RFC6122] in 2011.

   As specified in RFCs 3920 and 6122, the XMPP address format used the
   "stringprep" technology for preparation and comparison of non-ASCII
   characters [RFC3454].  Following the movement of internationalized
   domain names away from stringprep, this document defines the XMPP
   address format in a way that no longer depends on stringprep (see the
   Preparation, Enforcement, and Comparison of Internationalized Strings
   (PRECIS) problem statement [RFC6885]).  Instead, this document builds
   upon the internationalization framework defined by the IETF's PRECIS
   working group [RFC7564].

Saint-Andre                  Standards Track                    [Page 2]
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