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Internet Engineering Task Force (IETF)                         T. HardieRequest for Comments: 7936                                     July 2016Updates:6455Category: Standards TrackISSN: 2070-1721Clarifying Registry Proceduresfor the WebSocket Subprotocol Name RegistryAbstract   This document clarifies the instructions to IANA for the subprotocol   registry set up for WebSockets inRFC 6455.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 7841.   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/rfc7936.Copyright Notice   Copyright (c) 2016 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.Hardie                       Standards Track                    [Page 1]

RFC 7936             IANA Clarification ofRFC 6455            July 2016Table of Contents1. Introduction ...................................................22. Clarified Instructions .........................................23. Security Considerations ........................................24. IANA Considerations ............................................25. Normative References ...........................................3   Acknowledgements ..................................................3   Author's Address ..................................................31.  IntroductionSection 11.5 of [RFC6455] sets up a WebSocket Subprotocol Name   Registry at IANA and directs IANA to use First Come First Serve   registration procedures as set out in [RFC5226].  The reuse of this   registry by other protocols has indicated that some clarification of   the instructions to IANA would be useful.2.  Clarified Instructions   The tokens registered in the WebSocket Subprotocol Name Registry   created bySection 11.5 of RFC 6455 are matched using case-sensitive   string match.  IANA is, however, instructed to decline registrations   in the registry which differ only as to case, in order to minimize   potential confusion among different registered versions.  For other   useful advice on avoiding collision, registrants are encouraged to   consult the non-normativeSection 1.9 of RFC 6455.3.  Security Considerations   This document describes an update to registry policy, not a protocol.4.  IANA Considerations   This document is, in its entirety, a clarification of the registry   policy for the WebSocket Subprotocol Name Registry.  As part of this   clarification, IANA has listed both this document andRFC 6455 as   references for the WebSocket Subprotocol Name Registry.  In addition,   IANA has included the following note under the registry's   Registration Procedures: "Please seeSection 2 of RFC 7936, which   clarifies that registrations which differ from existing registrations   only by case will be refused."Hardie                       Standards Track                    [Page 2]

RFC 7936             IANA Clarification ofRFC 6455            July 20165.  Normative References   [RFC6455]  Fette, I. and A. Melnikov, "The WebSocket Protocol",RFC 6455, DOI 10.17487/RFC6455, December 2011,              <http://www.rfc-editor.org/info/rfc6455>.   [RFC5226]  Narten, T. and H. Alvestrand, "Guidelines for Writing an              IANA Considerations Section in RFCs",BCP 26,RFC 5226,              DOI 10.17487/RFC5226, May 2008,              <http://www.rfc-editor.org/info/rfc5226>.Acknowledgements   Takeshi Yoshino, Anne Van Kesteren, Julian Reshke, Barry Leiba, and   Alexey Melnikov reviewed this update.  Harald Alvestrand acted as   document shepherd.Author's Address   Ted Hardie   Email: ted.ietf@gmail.comHardie                       Standards Track                    [Page 3]