Media Fragments Working Group
Video, Audio, Images


Past and Upcoming Events
Weekly teleconference: every Wednesday, 12:00 UTC
15 August 2008 Call For Participation issued
17 September 2008 First telephone conference
20-21 October 2008 1st Face-to-face meeting @ TPAC 2008
9-10 December 2008 2nd Face-to-face meeting @ Ghent (BE)
16-17 April 2009 3rd Face-to-face meeting @ Barcelona (ES). The WWW conference is 20-24 April
17-18 September 2009 4th Face-to-face meeting @ Virtual
08-09 March 2010 5th Face-to-face meeting @ Ghent (BE)
15-16 June 2010 6th Face-to-face meeting @ Sophia Antipolis (FR)
01-02 November 2010 7th Face-to-face meeting @ TPAC 2010
... more W3C events

The mission of the Media Fragments Working Group, part of the Video in the Web Activity, was to address temporal and spatial media fragments in the Web using Uniform Resource Identifiers (URI).

The Media Fragments Working Group was closed on 5 December 2013, having successfully published the Media Fragments URI 1.0 (basic) specification as a Recommendation. Some ideas and removed parts of the Basic specifications were published in Media Fragments 1.0 URI (advanced) and might be reused by re-opening the Group or taken by another W3C Working Group.

Also on this page → Deliverables | Talks | WG Resources | Charter and History | Participants


Public Working Drafts

  1. Media Fragments URI 1.0:
  2. Use cases and requirements for Media Fragments:

Updated Schedule

Specification FPWD LC CR PR Rec
Use cases and requirements for Media Fragments April 2009 December 2009 - - -
Media Fragments 1.0 April 2009 March 2011 June 2011 October 2011 December 2011

Talks and Disseminations

27 January 2011
Thomas Steiner announces a Javascript library for Media Fragment (see the demo) on Thursday, 27 January 2011.
30 September 2010
Erik Mannens and Raphaël Troncy give a talk entitled "Implementing the Media Fragments URI" at the 2nd International Open Video Conference on Thursday, 30 September 2010, in New York, USA.
30 June 2010
Jakub Sendor presents the "Media Fragment Firefox plugin" in EURECOM, France, on Wednesday, 30 June 2010.
29 April 2010
Raphaël Troncy and Davy van Deursen give a talk entitled "Implementing the Media Fragments URI Specification" at the 19th International World Wide Web Conference on Thursday, 29 April 2010, in Raleigh, USA. Read the paper or watch the slides.
07 April 2010
Raphaël Troncy presents the "Media Fragments activities" to the W3C Semantic Web Coordination Group on Wednesday, 07 April 2010 (irc minutes).
09 March 2010
Davy van Deursen presents an amazing demo implementing the media fragment URI specification. Give it a try on the Ninsuna Web server. You would be able to select temporal fragment, tracks, spatial fragments, and see immediately the result displayed in a customized Flash player client.
02 September 2009
Silvia Pfeiffer announces a first refefence implementation for temporal media fragments URI. Give it a try on the Annodex Web server and read the blog post explaining how the deep hyperlinking into HTML5 video is implemented.
19 August 2009
Silvia Pfeiffer publishes a new blog post explaining how to jump to time offsets in HTML5 video summarizing the current discussion the group has regarding the use of the fragment and query parameter in URI for specifying time offsets.
2O April 2009
Raphaël Troncy gives a talk entitled "Interlinking Multimedia: How to Apply Linked Data Principles to Multimedia Fragments" at the WWW 2009 Workshop on Linked Data on the Web (LDOW) on Monday, 20 April 2009, in Madrid, Spain.
22 March 2009
Philippe Le Hégaret introduced the Interaction domain to the W3C Advisory Committee on Sunday, 22 March 2009, in Cambridge (MA), USA (slides). The one summary slide shows how the technologies HTML, CSS, SVG, MathML, Scripting, DFXP, Ruby and RDFa can work and interact together.
06 March 2009
Raphaël Troncy gives a talk entitled "Linked Media: Weaving non-textual content into the semantic web" at a European MozCamp on Friday, 06 March 2009, in Utrecht, The Netherlands.
06 February 2009
Raphaël Troncy presents the "Media Fragments activities" to the W3C Semantic Web Coordination Group on Friday, 06 February 2009 (irc minutes).
10 November 2008
Silvia Pfeiffer blogs about the intermediate results of the Working Group following its first face-to-face meeting in Cannes. Read Media fragment URI addressing and the comments she received.
26 September 2008
Philippe Le Hégaret gives a talk on behalf of the Korea Office entitled "Video on the Web" at the When IPTV meets the Web Workshop on Friday, 26 September 2008, in Seoul, Korea.
23 January 2008
Philippe Le Hégaret gives a talk via Webcast entitled "Video on the Web" at the W3C Spain Office Seminar, on Wednesday, 23 January 2008.

Working Group Resources

Meeting Minutes

Telecon Resources

Weekly teleconference: every Wednesday, 12:00 UTC

The number for all calls on W3C Zakim bridge is +1.617.761.6200 (US) or + (France); then enter conference passcode 3724# ("FRAG#"). If you can't get into the bridge, dial *0 to speak to the operator — they can manually connect you. Zakim allows participants to mute themselves by pressing 61# ("M" for mute, then "1" for on) and unmute themselves with 60#.

It is possible to participate in MediFrag meetings by telephone alone but participants' interaction is substantially improved by also joining the #mediafrag irc channel or using the IRC Web interface (see also the comprehensive help for IRC). The group makes use of the following agents: zakim, rrsagent, and tracker. The RIF Working Group pages for teleconference participants are recommended:

Mailing list

Technical discussion takes place on the Working Group discussion list, (archive). This is a public mailing list; to subscribe to the public-media-fragment mailing list, please check the subscription procedure.

Search the archive help

General information for New Issues

No matter what way you choose, please provide the following information:

It is also appreciated if the proposed solution comes with test cases.

Editors' Resources

General/Process Resources

Patent Disclosures

W3C maintains a public list of any patent disclosures made in connection with the deliverables of the group; that page also includes instructions for disclosing a patent.

Charter and History

The Media Fragments Working Group Charter shows what the W3C has asked this working group to do.

The Multimedia Task Force of the Semantic Web Best Practices and Deployment Working Group and the Multimedia Semantics Incubator Group initiated work on some of the items for which this working group is now responsible.

Working Group Participants

See: DBWG and IPP

Participants of the Working Group @ TPAC