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<p><emph>This section describes the status of this document at the time of its publication.
A list of current W3C publications and the latest revision of this technical report can be found in
the <loc href="https://www.w3.org/TR/">W3C technical reports index</loc> at https://www.w3.org/TR/.</emph></p>

<p>This is the Second <loc href="https://www.w3.org/2021/Process-20211102/#candidate-rec">Candidate Recommendation</loc> (CR2) of
the Second Edition of the Timed Text Markup Language &versionOfTT; (TTML&versionOfTT;), and is expected to advance to Proposed
Recommendation no earlier than 6 April 2021.
This Second <loc href="https://www.w3.org/2021/Process-20211102/#candidate-rec">Candidate Recommendation</loc> (CR2) makes no
technical changes to the previous, First <loc href="https://www.w3.org/2021/Process-20211102/#candidate-rec">Candidate
Recommendation</loc> (CR1); that is, only editorial (non-substantive) changes were applied.</p>

<p>For this specification to exit CR, the following criterion must be met: for each feature (extension) affected by a substantive
change introduced by this specification, at least two independent implementations must support the feature (extension) having been
so affected. No (underlying) feature (extension) has been added or removed by this revision, and, as such, no feature
(extension) is marked at risk.</p>

<p>An <loc href="https://www.w3.org/wiki/TimedText/TTML2SecondEditionImplementationReport">implementation report</loc> is provided.
A summary of technical changes from TTML2, 1st Edition, is available
at <loc href="ttml2-changes.html">Timed Text Markup Language 2 (TTML2) Change Summary</loc>.
Comments about this document are welcome by filing an <loc href="https://github.com/w3c/ttml2/issues">issue on GitHub</loc> or
sending email to <loc href="mailto:public-tt@w3.org">public-tt@w3.org</loc>
(<loc href="mailto:public-tt-request@w3.org?subject=subscribe">subscribe</loc>,
<loc href="http://lists.w3.org/Archives/Public/public-tt/">archives</loc>)
with a subject line starting with <code>[ttml2]</code>.</p>

<p>This document was published by the <loc href="https://www.w3.org/groups/wg/timed-text">Timed Text (TT) Working Group</loc>
as a Candidate Recommendation Snapshot 
using the <loc href="https://www.w3.org/2021/Process-20211102/#recs-and-notes">Recommendation track</loc>. This document is intended to become a W3C Recommendation.</p>

<p>Publication as a Candidate Recommendation does not imply endorsement by W3C and its Members.
A Candidate Recommendation Snapshot has received <loc href="https://www.w3.org/2021/Process-20211102/#dfn-wide-review">wide review</loc>,
is intended to gather implementation experience,
and has commitments from Working Group members to <loc href="https://www.w3.org/Consortium/Patent-Policy/#sec-Requirements">royalty-free licensing</loc> for implementations.</p>

<p>This document was produced by a group operating under the <loc href="https://www.w3.org/Consortium/Patent-Policy/">W3C Patent
Policy</loc>.  W3C maintains a <loc role="disclosure" href="https://www.w3.org/2004/01/pp-impl/34314/status#disclosures">public
list of any patent disclosures</loc> 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 <loc href="https://www.w3.org/Consortium/Patent-Policy/#def-essential">Essential Claim(s)</loc> must disclose
the information in accordance with <loc href="https://www.w3.org/Consortium/Patent-Policy/#sec-Disclosure">section 6 of
the W3C Patent Policy</loc>.</p>

<p>This document is governed by the <loc id="w3c_process_revision" href="https://www.w3.org/2021/Process-20211102/">2 November 2021
W3C Process Document</loc>.</p>

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