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Internet Engineering Task Force (IETF)                 P. Faltstrom, Ed.Request for Comments: 6452                                         CiscoCategory: Standards Track                                P. Hoffman, Ed.ISSN: 2070-1721                                           VPN Consortium                                                           November 2011The Unicode Code Points andInternationalized Domain Names for Applications (IDNA) - Unicode 6.0Abstract   This memo documents IETF consensus for Internationalized Domain Names   for Applications (IDNA) derived character properties related to the   three code points, existing in Unicode 5.2, that changed property   values when version 6.0 was released.  The consensus is that no   update is needed toRFC 5892 based on the changes made in Unicode   6.0.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 inSection 2 of RFC 5741.   Information about the current status of this document, any errata,   and how to provide feedback on it may be obtained athttp://www.rfc-editor.org/info/rfc6452.Copyright Notice   Copyright (c) 2011 IETF Trust and the persons identified as the   document authors.  All rights reserved.   This document is subject toBCP 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.Faltstrom & Hoffman          Standards Track                    [Page 1]

RFC 6452                    IDNA Code Points               November 2011Table of Contents1. Introduction ....................................................21.1. U+0CF1 KANNADA SIGN JIHVAMULIYA ............................21.2. U+0CF2 KANNADA SIGN UPADHMANIYA ............................21.3. U+19DA NEW TAI LUE THAM DIGIT ONE ..........................22. IETF Consensus ..................................................23. IANA Considerations .............................................34. Security Considerations .........................................35. Acknowledgements ................................................36. Normative References ............................................31.  IntroductionRFC 5892 [RFC5892] specifies an algorithm that was defined when   version 5.0 (later updated to version 5.2) [Unicode5.2] was the   current version of Unicode, and it also defines a derived property   value based on that algorithm.  Unicode 6.0 [Unicode6] has changed   GeneralCategory of three code points that were allocated in   Unicode 5.2 or earlier.  This implies that the derived property value   differs depending on whether the property definitions used are from   Unicode 5.2 or 6.0.  These are non-backward-compatible changes as   described inSection 5.1 of RFC 5892.   The three code points are:1.1.  U+0CF1 KANNADA SIGN JIHVAMULIYA   The GeneralCategory for this character changes from So to Lo.  This   implies that the derived property value changes from DISALLOWED to   PVALID.1.2.  U+0CF2 KANNADA SIGN UPADHMANIYA   The GeneralCategory for this character changes from So to Lo.  This   implies that the derived property value changes from DISALLOWED to   PVALID.1.3.  U+19DA NEW TAI LUE THAM DIGIT ONE   The GeneralCategory for this character changes from Nd to No.  This   implies that the derived property value changes from PVALID to   DISALLOWED.2.  IETF Consensus   No change toRFC 5892 is needed based on the changes made in   Unicode 6.0.Faltstrom & Hoffman          Standards Track                    [Page 2]

RFC 6452                    IDNA Code Points               November 2011   This consensus does not imply that no changes will be made toRFC 5892 for all future updates of The Unicode Standard.   This RFC has been produced because 6.0 is the first version of   Unicode to be released since IDNA2008 was published.3.  IANA Considerations   IANA has updated the derived property value registry according toRFC 5892 and the property values defined in The Unicode Standard   version 6.0.4.  Security Considerations   When the algorithm presented inRFC 5892 is applied using the   property definitions of Unicode Standard version 6.0, the result will   be different from when it is applied using the property definitions   of Unicode 5.2 for the three code points discussed in this document.   The three code points are unlikely to occur in internationalized   domain names, however, so the security implications of the changes   are minor.5.  Acknowledgements   The main contributors are (in alphabetical order) Eric Brunner-   Williams, Vint Cerf, Tina Dam, Mark Davis, Martin Duerst, John   Klensin, Pete Resnick, Markus Scherer, Andrew Sullivan, Kenneth   Whistler, and Nicholas Williams.   Not all contributors believe that the solution for the issues   discussed in this document is optimal.6.  Normative References   [RFC5892]     Faltstrom, P., Ed., "The Unicode Code Points and                 Internationalized Domain Names for Applications                 (IDNA)",RFC 5892, August 2010.   [Unicode5.2]  The Unicode Consortium, "The Unicode Standard,                 Version 5.2.0", Unicode 5.0.0, Boston, MA,                 Addison-Wesley ISBN 0-321-48091-0, as amended                 by Unicode 5.2.0, October 2009,                 <http://www.unicode.org/versions/Unicode5.2.0/>.   [Unicode6]    The Unicode Consortium, "The Unicode Standard,                 Version 6.0.0", October 2010,                 <http://www.unicode.org/versions/Unicode6.0.0/>.Faltstrom & Hoffman          Standards Track                    [Page 3]

RFC 6452                    IDNA Code Points               November 2011Authors' Addresses   Patrik Faltstrom (editor)   Cisco   EMail: paf@cisco.com   Paul Hoffman (editor)   VPN Consortium   EMail: paul.hoffman@vpnc.orgFaltstrom & Hoffman          Standards Track                    [Page 4]