This document specifies the second version of the Synchronized Multimedia Integration Language (SMIL, pronounced "smile"). SMIL 2.0 has the following two design goals:

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 W3C Recommendation of the Synchronized Multimedia Integration Language (SMIL) 2.0.

This document has been reviewed by W3C Members and other interested parties and has been endorsed by the Director as a W3C Recommendation. It is a stable document and may be used as reference material or cited as a normative reference from another document. W3C's role in making the Recommendation is to draw attention to the specification and to promote its widespread deployment. This enhances the functionality and interoperability of the Web.

The SYMM Working Group considers that all features in the SMIL 2.0 Recommendation have been implemented at least twice in an interoperable way. The SYMM Working Group Charter defines this as the implementations having been developed independently by different organizations and each test in the public SMIL 2.0 test suite has at least two passing implementations. The 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 on the SYMM Patent Statement page in conformance with W3C policy.

This version of this document incorporates some editorial changes from earlier versions.

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.