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diff --git a/doc/rfc/rfc6452.txt b/doc/rfc/rfc6452.txt new file mode 100644 index 0000000..e372d1c --- /dev/null +++ b/doc/rfc/rfc6452.txt @@ -0,0 +1,227 @@ + + + + + + +Internet Engineering Task Force (IETF) P. Faltstrom, Ed. +Request for Comments: 6452 Cisco +Category: Standards Track P. Hoffman, Ed. +ISSN: 2070-1721 VPN Consortium + November 2011 + + + The Unicode Code Points and + Internationalized Domain Names for Applications (IDNA) - Unicode 6.0 + +Abstract + + 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 to RFC 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 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/rfc6452. + +Copyright Notice + + Copyright (c) 2011 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. + + + + +Faltstrom & Hoffman Standards Track [Page 1] + +RFC 6452 IDNA Code Points November 2011 + + +Table of Contents + + 1. Introduction ....................................................2 + 1.1. U+0CF1 KANNADA SIGN JIHVAMULIYA ............................2 + 1.2. U+0CF2 KANNADA SIGN UPADHMANIYA ............................2 + 1.3. U+19DA NEW TAI LUE THAM DIGIT ONE ..........................2 + 2. IETF Consensus ..................................................2 + 3. IANA Considerations .............................................3 + 4. Security Considerations .........................................3 + 5. Acknowledgements ................................................3 + 6. Normative References ............................................3 + +1. Introduction + + RFC 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 in Section 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 to RFC 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 to + RFC 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 to + RFC 5892 and the property values defined in The Unicode Standard + version 6.0. + +4. Security Considerations + + When the algorithm presented in RFC 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 2011 + + +Authors' Addresses + + Patrik Faltstrom (editor) + Cisco + + EMail: paf@cisco.com + + + Paul Hoffman (editor) + VPN Consortium + + EMail: paul.hoffman@vpnc.org + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +Faltstrom & Hoffman Standards Track [Page 4] + |