Preparation, Enforcement, and Comparison of Internationalized Strings Representing Nicknames
draft-ietf-precis-7700bis-08

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PRECIS                                                    P. Saint-Andre
Internet-Draft                                                  Filament
Obsoletes: 7700 (if approved)                              June 27, 2017
Intended status: Standards Track
Expires: December 29, 2017

 Preparation, Enforcement, and Comparison of Internationalized Strings
                         Representing Nicknames
                      draft-ietf-precis-7700bis-08

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.

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   This Internet-Draft will expire on December 29, 2017.

Copyright Notice

   Copyright (c) 2017 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
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   include Simplified BSD License text as described in Section 4.e of

Saint-Andre             Expires December 29, 2017               [Page 1]
Internet-Draft              PRECIS: Nickname                   June 2017

   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 . . . . . . . . . . . . . . . . . . . . . . .   5
     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  . . . . . . . . . . . . . . . . . .   9
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Appendix A.  Changes from RFC 7700  . . . . . . . . . . . . . . .  11
   Appendix B.  Acknowledgements . . . . . . . . . . . . . . . . . .  11
   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 code points from
   outside the ASCII range [RFC20], typically by means of the Unicode
   coded character set [Unicode].  Although such nicknames tend to be