Guidelines and Registration Procedures for URI Schemes
RFC 7595

Document Type RFC - Best Current Practice (June 2015; Errata)
Obsoletes RFC 4395
Last updated 2015-10-14
Replaces draft-thaler-appsawg-uri-scheme-reg, draft-appsawg-uri-scheme-reg
Stream IETF
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Reviews
Stream WG state Submitted to IESG for Publication Dec 2014
Document shepherd Alexey Melnikov
Shepherd write-up Show (last changed 2014-11-03)
IESG IESG state RFC 7595 (Best Current Practice)
Consensus Boilerplate Yes
Telechat date
Responsible AD Barry Leiba
Send notices to (None)
IANA IANA review state IANA OK - Actions Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                    D. Thaler, Ed.
Request for Comments: 7595                                     Microsoft
Obsoletes: 4395                                                T. Hansen
BCP: 35                                                AT&T Laboratories
Category: Best Current Practice                                T. Hardie
ISSN: 2070-1721                                                   Google
                                                               June 2015

         Guidelines and Registration Procedures for URI Schemes

Abstract

   This document updates the guidelines and recommendations, as well as
   the IANA registration processes, for the definition of Uniform
   Resource Identifier (URI) schemes.  It obsoletes RFC 4395.

Status of This Memo

   This memo documents an Internet Best Current Practice.

   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
   BCPs 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/rfc7595.

Copyright Notice

   Copyright (c) 2015 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.

Thaler, et al.            Best Current Practice                 [Page 1]
RFC 7595                  URI Scheme Guidelines                June 2015

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  URIs and IRIs . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Requirements for Permanent Scheme Definitions . . . . . . . .   4
     3.1.  Demonstrable, New, Long-Lived Utility . . . . . . . . . .   4
     3.2.  Syntactic Compatibility . . . . . . . . . . . . . . . . .   4
     3.3.  Well Defined  . . . . . . . . . . . . . . . . . . . . . .   5
     3.4.  Definition of Operations  . . . . . . . . . . . . . . . .   6
     3.5.  Context of Use  . . . . . . . . . . . . . . . . . . . . .   6
     3.6.  Internationalization and Character Encoding . . . . . . .   7
     3.7.  Clear Security and Privacy Considerations . . . . . . . .   7
     3.8.  Scheme Name Considerations  . . . . . . . . . . . . . . .   8
     3.9.  Interoperability Considerations . . . . . . . . . . . . .   9
   4.  Guidelines for Provisional URI Scheme Registration  . . . . .   9
   5.  Guidelines for Historical URI Scheme Registration . . . . . .  10
   6.  Guidelines for Private URI Scheme Use . . . . . . . . . . . .  10
   7.  URI Scheme Registration Procedure . . . . . . . . . . . . . .  10
     7.1.  General . . . . . . . . . . . . . . . . . . . . . . . . .  10
     7.2.  Registration Procedures . . . . . . . . . . . . . . . . .  11
     7.3.  Change Control  . . . . . . . . . . . . . . . . . . . . .  13
     7.4.  URI Scheme Registration Template  . . . . . . . . . . . .  13
   8.  The "example" URI Scheme  . . . . . . . . . . . . . . . . . .  14
     8.1.  "example" URI Scheme Registration Request . . . . . . . .  15
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  16
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  16
     11.2.  Informative References . . . . . . . . . . . . . . . . .  17
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  18
   Contributor . . . . . . . . . . . . . . . . . . . . . . . . . . .  18
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  19

1.  Introduction

   The Uniform Resource Identifier (URI) protocol element and generic
   syntax is defined by [RFC3986].  Each URI begins with a scheme name,
   as defined by Section 3.1 of RFC 3986, that refers to a specification
   for identifiers within that scheme.  The URI syntax provides a
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