Preparation, Enforcement, and Comparison of Internationalized Strings Representing Nicknames
draft-ietf-precis-7700bis-00

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PRECIS                                                    P. Saint-Andre
Internet-Draft                                                  Filament
Obsoletes: 7700 (if approved)                              April 5, 2016
Intended status: Standards Track
Expires: October 7, 2016

 Preparation, Enforcement, and Comparison of Internationalized Strings
                         Representing Nicknames
                      draft-ietf-precis-7700bis-00

Abstract

   This document describes methods for handling Unicode strings
   representing memorable, human-friendly names (called "nicknames",
   "display names", or "petnames") for people, devices, accounts,
   websites, and other entities.  This document obsoletes RFC 7700.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on October 7, 2016.

Copyright Notice

   Copyright (c) 2016 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
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   include Simplified BSD License text as described in Section 4.e of

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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Nickname Profile  . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Rules . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Preparation . . . . . . . . . . . . . . . . . . . . . . .   4
     2.3.  Enforcement . . . . . . . . . . . . . . . . . . . . . . .   5
     2.4.  Comparison  . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Use in Application Protocols  . . . . . . . . . . . . . . . .   6
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
     6.1.  Reuse of PRECIS . . . . . . . . . . . . . . . . . . . . .   8
     6.2.  Reuse of Unicode  . . . . . . . . . . . . . . . . . . . .   8
     6.3.  Visually Similar Characters . . . . . . . . . . . . . . .   8
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Appendix A.  Acknowledgements . . . . . . . . . . . . . . . . . .  10
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

1.1.  Overview

   A number of technologies and applications provide the ability for a
   person to choose a memorable, human-friendly name in a communications
   context, or to set such a name for another entity such as a device,
   account, contact, or website.  Such names are variously called
   "nicknames" (e.g., in chat room applications), "display names" (e.g.,
   in Internet mail), or "petnames" (see [PETNAME-SYSTEMS]); for
   consistency, these are all called "nicknames" in this document.

   Nicknames are commonly supported in technologies for textual chat
   rooms, e.g., Internet Relay Chat [RFC2811] and multi-party chat
   technologies based on the Extensible Messaging and Presence Protocol
   (XMPP) [RFC6120] [XEP-0045], the Message Session Relay Protocol
   (MSRP) [RFC4975] [RFC7701], and Centralized Conferencing (XCON)
   [RFC5239] [XCON-SYSTEM].  Recent chat room technologies also allow
   internationalized nicknames because they support characters from
   outside the ASCII range [RFC20], typically by means of the Unicode
   character set [Unicode].  Although such nicknames tend to be used
   primarily for display purposes, they are sometimes used for

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