datatracker.ietf.org
Sign in
Version 5.3.0, 2014-04-12
Report a bug

PRECIS Framework: Preparation and Comparison of Internationalized Strings in Application Protocols
draft-ietf-precis-framework-16

Document type: Active Internet-Draft (precis WG)
Document stream: IETF
Last updated: 2014-04-23 (latest revision 2014-04-21)
Intended RFC status: Proposed Standard
Other versions: plain text, xml, pdf, html

IETF State: Submitted to IESG for Publication Nov 2010
Consensus: Yes
Document shepherd: Alexey Melnikov
Shepherd Write-Up: Last changed 2014-02-10

IESG State: Waiting for AD Go-Ahead
IANA Review State: IANA - Not OK
IANA Action State: None
(Needs 4 more YES or NO OBJECTION positions to pass.)
Responsible AD: Pete Resnick
Send notices to: precis-chairs@tools.ietf.org, draft-ietf-precis-framework@tools.ietf.org, precis@ietf.org

PRECIS                                                    P. Saint-Andre
Internet-Draft                                                      &yet
Obsoletes: 3454 (if approved)                                M. Blanchet
Intended status: Standards Track                                Viagenie
Expires: October 23, 2014                                 April 21, 2014

   PRECIS Framework: Preparation and Comparison of Internationalized
                    Strings in Application Protocols
                     draft-ietf-precis-framework-16

Abstract

   Application protocols using Unicode characters in protocol strings
   need to properly prepare such strings in order to perform valid
   comparison operations (e.g., for purposes of authentication or
   authorization).  This document defines a framework enabling
   application protocols to perform the preparation and comparison of
   internationalized strings ("PRECIS") in a way that depends on the
   properties of Unicode characters and thus is agile with respect to
   versions of Unicode.  As a result, this framework provides a more
   sustainable approach to the handling of internationalized strings
   than the previous framework, known as Stringprep (RFC 3454).  This
   document obsoletes RFC 3454.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on October 23, 2014.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Saint-Andre & Blanchet  Expires October 23, 2014                [Page 1]
Internet-Draft              PRECIS Framework                  April 2014

   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  String Classes  . . . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.2.  IdentifierClass . . . . . . . . . . . . . . . . . . . . .   7
     3.3.  FreeformClass . . . . . . . . . . . . . . . . . . . . . .   9
   4.  Profiles  . . . . . . . . . . . . . . . . . . . . . . . . . .  10
     4.1.  Principles  . . . . . . . . . . . . . . . . . . . . . . .  10
     4.2.  Building Application-Layer Constructs . . . . . . . . . .  13
     4.3.  A Note about Spaces . . . . . . . . . . . . . . . . . . .  13
   5.  Order of Operations . . . . . . . . . . . . . . . . . . . . .  14
   6.  Code Point Properties . . . . . . . . . . . . . . . . . . . .  15
   7.  Category Definitions Used to Calculate Derived Property . . .  16
     7.1.  LetterDigits (A)  . . . . . . . . . . . . . . . . . . . .  17
     7.2.  Unstable (B)  . . . . . . . . . . . . . . . . . . . . . .  18
     7.3.  IgnorableProperties (C) . . . . . . . . . . . . . . . . .  18
     7.4.  IgnorableBlocks (D) . . . . . . . . . . . . . . . . . . .  18
     7.5.  LDH (E) . . . . . . . . . . . . . . . . . . . . . . . . .  18
     7.6.  Exceptions (F)  . . . . . . . . . . . . . . . . . . . . .  18
     7.7.  BackwardCompatible (G)  . . . . . . . . . . . . . . . . .  19
     7.8.  JoinControl (H) . . . . . . . . . . . . . . . . . . . . .  20
     7.9.  OldHangulJamo (I) . . . . . . . . . . . . . . . . . . . .  20
     7.10. Unassigned (J)  . . . . . . . . . . . . . . . . . . . . .  20
     7.11. ASCII7 (K)  . . . . . . . . . . . . . . . . . . . . . . .  21
     7.12. Controls (L)  . . . . . . . . . . . . . . . . . . . . . .  21
     7.13. PrecisIgnorableProperties (M) . . . . . . . . . . . . . .  21
     7.14. Spaces (N)  . . . . . . . . . . . . . . . . . . . . . . .  21

[include full document text]