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Synchronized Multimedia Integration Language (SMIL 2.0)

W3C Proposed Edited Recommendation 05 November 2004

This version:
Latest SMIL 2 version:
Latest SMIL Recommendation:
Previous version:
Jeff Ayars (RealNetworks), Dick Bulterman (Oratrix), Aaron Cohen (Intel), Ken Day (Macromedia), Erik Hodge (RealNetworks), Philipp Hoschka (W3C), Eric Hyche (RealNetworks), Muriel Jourdan (INRIA), Michelle Kim (IBM), Kenichi Kubota (Panasonic), Rob Lanphier (RealNetworks), Nabil Layaïda (INRIA), Thierry Michel (W3C), Debbie Newman (Microsoft), Jacco van Ossenbruggen (CWI), Lloyd Rutledge (CWI), Bridie Saccocio (RealNetworks), Patrick Schmitz (Microsoft), Warner ten Kate (Philips).
Thierry Michel (W3C) - Proposed Edited Recommendation version.

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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. 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 Proposed Edited Recommendation, a revised edition of the Synchronized Multimedia Integration Language (SMIL) 2.0.
It is here made available for review by W3C members and other interested parties. Note that a Candidate Recommendation draft has not been deemed necessary by the Working Group, as there are no substantial implementation issues arising as a result of this edition, which aims only to incorporate the published corrigenda to the first edition.
If this document is approved as a W3C Recommendation, it will supersede the 07 August 2001 version of the the SMIL 2.0 Recommendation.

Please send comments on this Proposed Edited Recommendation to, including 2E PER in the subject line, no later than 05 December 2004.
Publication as a Proposed Edited 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.

This document has been produced by the SYMM Working Group [members only] as part of the W3C Synchronized Multimedia Activity. The goals of the SYMM Working Group are discussed in the SYMM Working Group charter [members only].

This second edition of SMIL 2.0 is not a new version, it merely incorporates the changes dictated by the corrections to errors found in the first edition as agreed by the SYMM Working Group, as a convenience to readers. A separate list of all such corrections is available at
The errata list for this second edition is available at

The SMIL 2.0 test suite and Implementation results are publicly released and are intended solely to be used as proof of SMIL 2.0 implementability. It is only a snap shot of the actual implementation behaviors at one moment of time, as these implementations may not be immediately available to the public. The interoperability data is not intended to be used for assessing or grading the performance of any individual implementation.

There are patent disclosures and license commitments associated with the SMIL 2.0 Recommendation, these may be found at the Working Group's public SYMM Patent Statement page in conformance with W3C policy.

The 7 August 2001 version of the SMIL 2.0 Recommendation was published before W3C adopted a specific Patent Policy. Per the Patent Policy Transition Procedure, this revision of the Recommendation will therefore be covered by the 24 January 2002 Current Patent Practice.

Please report errors in this document to - (public archives).

The authors of this document are the SYMM Working Group members. Different parts of the document have different editors.
The W3C staff contact for work on SMIL is Thierry MICHEL.

The English version of this specification is the only normative version. Information about translations of this document is available.

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