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+Internet Engineering Task Force (IETF)                         T. Hardie
+Request for Comments: 7936                                     July 2016
+Updates: 6455
+Category: Standards Track
+ISSN: 2070-1721
+
+
+                     Clarifying Registry Procedures
+              for the WebSocket Subprotocol Name Registry
+
+Abstract
+
+   This document clarifies the instructions to IANA for the subprotocol
+   registry set up for WebSockets in RFC 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 in Section 2 of RFC 7841.
+
+   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/rfc7936.
+
+Copyright Notice
+
+   Copyright (c) 2016 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.
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+Hardie                       Standards Track                    [Page 1]
+
+RFC 7936             IANA Clarification of RFC 6455            July 2016
+
+
+Table of Contents
+
+   1. Introduction ................................................... 2
+   2. Clarified Instructions ......................................... 2
+   3. Security Considerations ........................................ 2
+   4. IANA Considerations ............................................ 2
+   5. Normative References ........................................... 3
+   Acknowledgements .................................................. 3
+   Author's Address .................................................. 3
+
+1.  Introduction
+
+   Section 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 by Section 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-normative Section 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 and RFC 6455 as
+   references for the WebSocket Subprotocol Name Registry.  In addition,
+   IANA has included the following note under the registry's
+   Registration Procedures: "Please see Section 2 of RFC 7936, which
+   clarifies that registrations which differ from existing registrations
+   only by case will be refused."
+
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+Hardie                       Standards Track                    [Page 2]
+
+RFC 7936             IANA Clarification of RFC 6455            July 2016
+
+
+5.  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.com
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+Hardie                       Standards Track                    [Page 3]
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