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All formats defined by W3C specifications are of general interest to the Internet Community and are therefore registered in the standards tree (formerly IETF tree), which requires approval by the IESG.

Status of This Document

This document has been superseded. Please see the 2020 revision of this document.

This document explains the procedures available to register an Internet Media Type for a format defined by a W3C specification in the IANA registry. It is being maintained by Philippe Le Hégaret who, together with Wendy Seltzer, is serving as IETF/W3C liaison.

A new process, BCP 13, for registering Mime media types is defined in Media Type Specifications and Registration Procedures together with Multipurpose Internet Mail Extensions (MIME) Part Four: Registration Procedures, which covers IANA registration procedures for MIME external body access types and content-transfer-encodings. While the first document hasn’t been formally approved, it is our understanding that this is the process followed by the IETF and the IESG.

The TAG refers to this document in its April 2004 Finding Internet Media Type registration, consistency of use:

W3C Working Groups engaged in defining a format follow How to Register a Media Type with IANAto register an Internet Media Type (defined in [RFC2046]) for the format.

1. Registration process

This procedure is based on Media Type Specifications and Registration Procedures.

Note: Once a media type has been published by the IANA, the owner may request a change to its definition. The same procedure that would be appropriate for the original registration request is used to process a change request. See also Section 9, Change Procedures in BCP 13.

  1. Draft a proposal for the Media Type registration as a normative part of your specification, following the instructions in Media Type Specifications and Registration Procedures, section 4, and the template in section 10. Make sure that this part of the specification is readable on its own, without the context of the specification. If you are using XML, see RFC 6839 and RFC 7303 requirements and section 4.5.7 Media types for XML of the World Wide Web Architecture as well. In the introduction to the relevant section, say that this registration is for community review and will be submitted to the IESG for review, approval, and registration with IANA.
  2. One to two months prior to Candidate Recommendation: Send an email to the mailing list media-types@iana.org asking for comments on the Media Type section of your specification:
    • Include a pointer to and a plaintext copy (not just an attachment) of the Media Type registration section in your email to media-types@iana.org.
    • Make sure you address and reply to comments and questions on media-types@iana.org. If you change the registration in your specification as a result of comments on ietf-type (or for any other reason), send the revised version to media-types@iana.org.
    • If you are registering an XML-based format, you may want to cc: ietf-xml-mime@imc.org.
    • Note that you need to be subscribed to the list to post to it.
    • To make it easier for your WG to track comments on the Media Type section, you may cross-post the comments list for your specification.
  3. In preparation for Candidate Recommendation:
    • Change the introduction to the registration information to say that it is being submitted to the IESG for review, approval, and registration with IANA (see also MediaTypes - IESG).
    • Send a request to Wendy Seltzer and Philippe Le Hégaret, IETF liaisons, with the following information:
      1. Statement asking us to request review and approval by the IESG, and registration by IANA (so that we know what this is about).
      2. Expected date of state transition (publication in TR), and next state (CR or PR) (so that we know when we can send this to the IESG, and don’t loose time).
      3. Pointer to registration template at the place it will be published (dated and undated), so that we can tell the IESG what to review.
      4. Pointer to Last Call email to media-types@iana.org (archives) and following discussion/comment resolution (relevant threads in email archive and/or relevant part of Last Call resolution table), so that we can show to the IESG that this has received appropriate community review.
      5. Check that all information are provided for the form.

      If any of the above information changes, send an update.

  4. In preparation for Proposed Recommendation and Recommendation:
    1. Check on progress of registration, first directly at IANA, and if your type is not yet registered there, contact Wendy Seltzer and Philippe Le Hégaret, IETF liaisons, who will check with the IESG.
    2. Update the introduction to the registration information in your specification to say either “registered with IANA at…” or “under review by the IESG…”, as applicable.
    3. If your registration points to a dated version, request update of the registration via Wendy Seltzer and Philippe Le Hégaret, IETF liaisons.

W3C Community Groups may also request to register a provisional media type through W3C. All requests for W3C media types submitted to IANA get checked by W3C. Contact Wendy Seltzer or Philippe Le Hégaret if you have questions.

2. Registration Status

(specs/entries missing: p3p?, xml schema?, cc/pp? xkms?)

Spec Spec Status Info in Spec Type (proposed) Registration Status Remarks Plans Contact
Cascading Style Sheets, level 2 (CSS2) REC section 3.4 text/css registered RFC 2318 use CSS3 to move info to spec? Bert Bos
Extensible MultiModal Annotation markup language (EMMA) PR B.1 Registration of MIME media type application/emma+xml application/emma+xml registered - Kazuyuki Ashimura
HTML5 REC 12.1 text/html text/html registered Robin Berjon
HTML5 REC 12.2 multipart/x-mixed-replace multipart/x-mixed-replace registered Robin Berjon
HTML5 REC 12.3 application/xhtml+xml text/html registered Robin Berjon
HTML5 REC 12.4 application/x-www-form-urlencoded application/x-www-form-urlencoded registered Robin Berjon
HTML5 REC 12.5 text/cache-manifest text/cache-manifest registered Robin Berjon
Server-Sent Events PR 11.1: full template (text/event-stream) follow new process Yves Lafon
Ink Markup Language (InkML) REC App. B: full template (application/inkml+xml) registered - - Kazuyuki Ashimura
Timed Text Markup Language 1 (TTML1) (Second Edition) REC C: full template application/ttml+xml registered 2016: Update the registration Timed Text Working Group (public-tt@w3.org)
Mathematical Markup Language (MathML 3.0) REC Appendix B.2: full template application/mathml+xml registered - - Paul Libbrecht (member-math@w3.org)
Mathematical Markup Language (MathML 3.0) REC Appendix B.3: full template application/mathml-presentation+xml registered - - Paul Libbrecht (member-math@w3.org)
Mathematical Markup Language (MathML 3.0) REC Appendix B.4: full template application/mathml-content+xml registered - - Paul Libbrecht (member-math@w3.org)
Protocol for Web Description Resources (POWDER): Description Resources REC Appendix B (application/powder+xml)

Need to address comments from IESG. Full template need to be in errata.

Check in plh Phil Archer
Protocol for Web Description Resources (POWDER): Description Resources REC Appendix C (application/powder-s+xml) Need to address comments from IESG. Full template need to be in errata Check in with plh Phil Archer

Portable Network Graphics (PNG)

 REC Annex A image/png registered registration by email - Glenn Randers-Pehrson

Voice Extensible Markup Language (VoiceXML 2.0)

 REC

App. N: no template

 application/voicexml+xml registered RFC4267 use old process Kazuyuki Ashimura
Pronunciation Lexicon Specification REC - application/pls+xml registered RFC4267 use old process Kazuyuki Ashimura
Voice Browser Call Control: CCXML Version 1.0 LC Appendix I, full template?! application/ccxml+xml registered RFC4267 use old process Kazuyuki Ashimura
Speech Recognition Grammar Specification (SGRS) abnf REC App. G: no template application/srgs registered RFC4267 use old process Kazuyuki Ashimura
Speech Recognition Grammar Specification (SRGS) xml REC App. G: no template application/srgs+xml registered RFC4267 use old process Kazuyuki Ashimura
Speech Synthesis Markup Language (SSML 1.0) REC App. E: no template application/ssml+xml registered RFC4267 use old process Kazuyuki Ashimura
State Chart XML (SCXML): State Machine Notation for Control Abstraction 1.0 WD - - follow new process Kazuyuki Ashimura
Synchronized Multimedia Integration Language (SMIL 2.0) REC Section 2.3.1: no template application/smil - obsoleted in SMIL 2.1 and RFC 4536 - Philipp Hoschka
Synchronized Multimedia Integration Language (SMIL 2.1) REC Section 2.4.1: no template application/smil+xml registered RFC 4536 - Philipp Hoschka
Scalable Vector Graphics (SVG) 1.1 (Second Edition) REC App. P: full template image/svg+xml registered - - Chris Lilley, Doug Schepers (member-svg-media-type@w3.org).
SOAP 1.2 REC (Part2, App. A, full template) application/soap+xml registered RFC 3902 - Mark Nottingham
XML-binary Optimized Packaging REC Section 5, full template application/xop+xml registered - - Mark Nottingham
Web Services Description Language (WSDL 2.0) REC App. A: full template application/wsdl+xml registered - - Philippe Le Hégaret
Web Services Policy 1.5 REC Appendix A, full template application/wspolicy+xml registered - - Felix Sasaki
Widget Packaging and Configuration REC Appendix, full template application/widget registered - - Steven Pemberton, member-webapps@w3.org
Extensible Markup Language (XML) REC App. F.2 application/xml registered RFC 7303 - Chris Lilley, Henry Thompson
Extensible Markup Language (XML) REC App. F.2 text/xml registered RFC 7303
deprecated 		- Chris Lilley, , Henry Thompson
Extensible Markup Language (XML) REC - application/xml-external-parsed-entity registered RFC 7303 - Chris Lilley, Henry Thompson
Extensible Markup Language (XML) REC - application/xml-dtd registered RFC 7303 - Chris Lilley, Henry Thompson
Extensible Markup Language (XML) REC - text/xml-external-parsed-entity registered RFC 7303
deprecated		 - Chris Lilley, Henry Thompson
Efficient XML Interchange CR App F.2, full template application/exi registered W3C
XML Encryption REC Section 8, template application/xenc+xml registered - - José Kahan
XProc: An XML Pipeline Language REC App. I, full template (application/xproc+xml) - Nothing done. Reping spec author. Check in with Norm and Henry public-xml-processing-model-comments@w3.org
XQuery 1.0 REC App. I, full template (application/xquery) - Next step is IESG review Check in with Liam Liam Quin, Jim Melton
XML Syntax for XQuery (XQueryX 1.0) REC Appendix C, full template (application/xquery+xml) - Next step is IESG review Check in with Liam Liam Quin, Jim Melton
XSL Transformations (XSLT 2.0) REC App. B, full template application/xslt+xml registered - - Liam Quin, Norman Walsh
RDF/XML REC Section 4: no template application/rdf+xml registered RFC 3870 - Dan Connolly
SPARQL Query Language for RDF REC Appendix E - full template application/sparql-query registered - - Eric Prud'hommeaux <public-rdf-dawg-comments@w3.org>
SPARQL Query Results XML Format REC Section 5: full template application/sparql-results+xml registered - - Eric Prud'hommeaux <public-rdf-dawg-comments@w3.org>
Serializing SPARQL Query Results in JSON Note Internet Media Type, File Extension and Macintosh File Type (application/sparql-results+json) wait for RDF Core to work out their RDF JSON serialization, then align with them - - Kendall Clark, Elias Torres, Lee Feigenbaum <public-rdf-dawg-comments@w3.org>
Turtle - Terse RDF Triple Language Note Internet Media Type, File Extension and Macintosh File Type text/turtle registered - - Eric Prud'hommeaux
Turtle - Terse RDF Triple Language Note Internet Media Type, File Extension and Macintosh File Type text/n3 registered - - Eric Prud'hommeaux
RIF Core Dialect REC Appendix: RIF Media Type Registration (application/rif+xml)

under review

 Check in with Sandro? Sandro Hawke
OWL 2 Web Ontology Language: Structural Specification and Functional-Style Syntax LC Appendix: Internet Media Type, File Extension, and Macintosh File Type (text/owl-functional) under review Address comments from media-types? Request IESG review. Check in Sandro first. Sandro Hawke
OWL 2 Web Ontology Language: Manchester Syntax Note Appendix: Internet Media Type, File Extension and Macintosh File Type (text/owl-manchester) - Needs media-types review. - Sandro Hawke
OWL 2 Web Ontology Language: XML Serialization REC Appendix: Internet Media Type, File Extension, and Macintosh File Type (application/owl+xml) under review Address comments from media-types? Request IESG review. Check in Sandro first. Sandro Hawke
WOFF File Format 1.0 PR Appendix B: Media Type registration application/font-woff registered - - Chris Lilley
WOFF File Format 2.0 WD Appendix A: Media Type registration font/woff - - Needs font Primary Content Type to move forward Chris Lilley
WOFF File Format 2.0 WD Appendix A: Media Type registration font/woff2 - - Needs font Primary Content Type to move forward Chris Lilley
WOFF File Format 2.0 WD Appendix A: Media Type registration font/snt - - Needs font Primary Content Type to move forward Vladimir Levantovsky
WOFF File Format 2.0 WD Appendix A: Media Type registration font/ttf - - Needs font Primary Content Type to move forward Vladimir Levantovsky
WOFF File Format 2.0 WD Appendix A: Media Type registration font/otf - - Needs font Primary Content Type to move forward Vladimir Levantovsky
Metadata Vocabulary for Tabular Data CR C. IANA Considerations application/csvm+json registered - - Ivan Hermann

3. History of this Document

Philippe Le Hégaret, IETF/W3C liaison.

last revised $Date: 2019/12/12 20:26:37 $ by $Author: plehegar $