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Synchronized Multimedia Integration Language (SMIL 2.0) Specification

W3C Working Draft 21 September 2000

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Jeff Ayars (RealNetworks), Dick Bulterman (Oratrix), Aaron Cohen (Intel), Ken Day (Macromedia), Erik Hodge (RealNetworks), Philipp Hoschka (W3C), Eric Hyche (RealNetworks), Muriel Jourdan (INRIA), Kenichi Kubota (Panasonic), Rob Lanphier (RealNetworks), Nabil Layaïda (INRIA), Philippe Le Hégaret (W3C), Thierry Michel (W3C), Debbie Newman (Microsoft), Jacco van Ossenbruggen (CWI), Lloyd Rutledge (CWI), Bridie Saccocio (RealNetworks), Patrick Schmitz (Microsoft), Warner ten Kate (Philips).


This document specifies the second version of the Synchronized Multimedia Integration Language (SMIL, pronounced "smile"). SMIL 2.0 has the following two 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. The latest status of this document series is maintained at the W3C.

This is the Last-Call public Working Draft of SMIL 2.0 specification, issued by the SYMM Working Group [members only], for review by the public, by members and working groups of the World Wide Web Consortium.

This document has been produced as part of the W3C Synchronized Multimedia Activity of the W3C User Interface Domain. The goals of the SYMM Working Group are discussed in the SYMM Working Group charter [members only], (revised July 2000 from original charter version).

This Working Draft incorporates all Working Group decisions through 2000-09-15. It has been reviewed by the SYMM Working Group, and the Working Group has agreed to its publication as a Last Call draft. The Last Call period is expected to end 20 October 2000. Following this Last Call for Review, the Working Group intends to submit this specification for publication as a Candidate Recommendation.

This schedule may vary, depending on the comments of the public and of other W3C working groups on this draft. Such comments are instrumental in the WG's deliberations, and we encourage readers to review the draft and to send comments to An archive of the comments received is available.

Although the Working Group does not anticipate further changes to the functionality described here, this is still a working draft, subject to change. The present version should be implemented only by those interested in providing a check on its design or by those preparing for an implementation of the Candidate Recommendation. The SYMM WG will not allow early implementation to constrain its ability to make changes to this specification prior to final release.

The XHTML+SMIL Profile which appeared in previous working drafts is still in progress and not yet ready for Last Call. It continues to be updated and will be published as a separate Last Call specification when it is ready. Refer to the available public working draft version of that profile.

This working draft may be updated, replaced or rendered obsolete by other W3C documents at any time. It is inappropriate to use W3C Working Drafts as reference material or to cite them as other than "work in progress". This document is work in progress and does not imply endorsement by the W3C membership.

A list of current W3C Recommendations and other technical documents can be found at

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