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Synchronized Multimedia Integration Language (SMIL 3.0)

W3C Candidate Recommendation 15 January 2008

This version:
Latest SMIL 3 version:
Latest SMIL Recommendation:
Previous version:
Dick Bulterman, CWI - Jack Jansen, CWI - Sjoerd Mullender, CWI - Marisa DeMeglio, DAISY Consortium - Julien Quint, DAISY Consortium - Petri Vuorimaa, HUT - Samuel Cruz-Lara, INRIA - Hiroshi Kawamura, NRCD - Daniel Weck, NRCD - Eric Hyche, RealNetworks - Xabiel García Pañeda, Universidad de Oviedo - David Melendi, Universidad de Oviedo - Thierry Michel, W3C - Daniel F. Zucker, Invited Expert.

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This document specifies the third version of the Synchronized Multimedia Integration Language (SMIL, pronounced "smile"). SMIL 3.0 has the following design goals:

Status of this document

This section describes the status of this document at the time of its publication. Other documents may supersede this document. A list of current W3C publications and the latest revision of this technical report can be found in the W3C technical reports index at

This is a W3C Candidate Recommendation of the Synchronized Multimedia Integration Language (SMIL) 3.0.
This document is based upon the SMIL 3.0 Last Call Working Draft published on 13 July 2007. The current document contains editorial improvements, and minor bug fixes in response to Last Call comments.The SMIL 3.0 External timing module in the Last Call draft was removed from this version. It is now a standalone document called SMIL Timesheets 1.0 in order to give it more visibility as Timesheets allows integration of timing into a wide range of other XML languages. The significant changes in this draft are available at changeslog.

Please send review comments about this Candidate Recommendation to the public mailing list [archives], including the prefix'[SMIL30 CR comment]' in the subject line. We expect that sufficient feedback to determine its future will have been received by 20 January 2008.

This specification will remain a Candidate Recommendation until at least 01 February 2008.

The SYMM Working Group will advance this specification to Proposed Recommendation when the following exit criteria have been met:

Any feedback on implementation and use of this specification would be very welcome. To the extent possible, please provide a separate email message for each distinct comment.

This document has been produced by the SYMM Working Group as part of the W3C Synchronized Multimedia Activity, following the procedures set out for the W3C Process. The goals of the SYMM Working Group are discussed in the SYMM Working Group Charter. The authors of this document are the SYMM Working Group members. Different parts of the document have different editors.

This document was produced by a group operating under the 5 February 2004 W3C Patent Policy. 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. An individual who has actual knowledge of a patent which the individual believes contains Essential Claim(s) must disclose the information in accordance with section 6 of the W3C Patent Policy.

Publication as a Candidate Recommendation does not imply endorsement by the W3C Membership. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress.

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