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Moving errata page for IMSC 1.1 and 1.2 into static #646

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41b0d8d
copied 1.1, 1.2 errata files from w3.org (w/o JS)
himorin Jun 23, 2026
dfeaf67
insert html part from current errata page
himorin Jun 23, 2026
d90eab4
fixed css link
himorin Jun 23, 2026
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155 changes: 155 additions & 0 deletions imsc1/misc/static-errata/errata.css
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div#toc a, section#toc a {
text-decoration: none;
}

div#toc a:hover, section#toc a:hover {
background: yellow;
color: red;
}

div#toc ul, section#toc ul {
list-style-type: none;
margin-left: 1.5em;
padding-left: 0;
}

.tocvisible, .tochidden { cursor: pointer; }
.tocvisible:before { content: "▾ "; font-size: 110%; }
.tochidden:before { content: "‣ "; font-size: 110%; }

/* Careful: the content below are two non-breakable spaces (in UTF-8)! */
span.tocnumber:not(.tocvisible):not(.tochidden):before {
content: "  ";
font-size: 120%;
}

body {
font: 12px arial, helvetica,arial,freesans,clean,sans-serif;
color:black;
line-height:1.4em;
padding: 2em 2em;
}

/* Links... */

a {
color: NavyBlue;
background: transparent;
}

a:link, a:active {
background: transparent;
text-decoration:none;
}

a:visited {
color: NavyBlue;
background: transparent;
}

a:hover{
background-color: yellow;
color: #00e;
}

a code, a:link code, a:visited code {
color:#4183c4;
}

a:link img, a:visited img {
border-style: none
}

/* Headers */
h1, h2, h3, h4, h5, h6
{
margin-bottom: 0.5em;
margin-top: 1em;
padding-bottom: 0.15em;
border-bottom: 1px solid #ccc;
background: transparent;
color: #005a9c;
font-weight: normal;
}

.title-date {
font-size: 1.4em;
color: #005a9c;
font-weight: normal;
}

footer
{
margin-top: 2em;
border-top: 1px ridge #ccc;
font-size: 90%;
}

h1
{
border-bottom: none;
}

h5, h6 {
border: none;
font-size: 100%;
}

headertoclevel1, .headertoclevel2, .headertoclevel3, .headertoclevel4
{
border-bottom: 1px solid #ccc !important;
}

.headertoclevel1
{
font-size: 1.5em !important;
}

.headertoclevel2
{
font-size: 1.17em !important;
}

.headertoclevel3
{
font-size: 1em !important;
}

.headertoclevel4, .headertoclevel5 {
border: none !important;
font-size: 1em !important;
}
/* --- */

hr { border:1px solid #ddd; }

dt {
font-weight:bold;
margin-left:1em;
}

sup {
font-size: 0.83em;
vertical-align: super;
line-height: 0;
}

.summary {
font-size: 1.4em;
color: #005a9c;
font-weight: normal;
}
div.issue {
margin-left: 1em;
margin-bottom: 0.3em;
padding-right: 0.5em;
padding-left: 0.5em;
padding-top: 0.2em;
border-radius: 10px;
border: solid black 1px;
}
span.what {
font-weight: bold;
font-style: italic;
}

151 changes: 151 additions & 0 deletions imsc1/misc/static-errata/ttml-imsc1.1-errata.html
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<!DOCTYPE html>
<html>
<head data-githubrepo="w3c/imsc">
<meta charset="UTF-8">
<title>Open Errata for IMSC 1.1</title>
<link rel="stylesheet" type="text/css" href="errata.css"/>
<!--
The data-githubrepo attribute provides the owner/repo name on github. For W3C repositories most of those are of the
form 'w3c/XXX', although there are groups that have their own owner for their repository.
-->
<!--
This page was originally built with JS and github API, removing all script tags to turn into static page after IMSC 1.3 release.
-->

<style type="text/css">
.todo {
background-color: yellow
}
</style>
</head>
<body>
<header>
<p class="banner"><a accesskey="W" href="/"><img width="72" height="48" alt="W3C" src="https://www.w3.org/Icons/w3c_home" /></a> </p>
<br />
<h1 class="title">Open Errata for IMSC 1.1</h1>
<dl>
<dt>Latest errata update:</dt>
<dd><span id="date">Friday, March 27th 2026</span></dd>
<dt>Number of recorded errata:</dt>
<dd><span id="number">4</span></dd>
<dt>Link to all errata:</dt>
<dd><span id="errata_link">https://github.com/w3c/imsc/labels/Errata</span></dd>
</dl>

<section data-notoc>
<h1>How to Submit an Erratum?</h1>
<p>Errata are introduced and stored in the <a href="https://github.com/w3c/imsc/issues/">issue list of the group‘s GitHub repository</a>. The workflow to add a new erratum is as follows:</p>
<ul>
<li>An issue is raised for a possible erratum. The label of the issue SHOULD be set to “<code>ErratumRaised</code>”. It is o.k. for an erratum to have several labels. In some, exceptional, cases, i.e., when the erratum is very general, it is also acceptable not to have a reference to a document.</li>
<li>Issues labeled as “<code>Editorial</code>” are displayed separately, to make it easier to differentiate editorial errata from substantive ones.</li>
<li>The community discusses the issue. If it is accepted as a genuine erratum, the label “<code>Errata</code>” is added to the entry and the “<code>ErratumRaised</code>” label should be removed. Additionally, a new comment on the issue MAY be added, beginning with the word "Summary:" (if such a summary is useful based on the discussion).</li>
<li>If the community rejects the issue as an erratum, the issue should be closed.</li>
<li>Each errata may be labelled as “<code>Editorial</code>”; editorial errata are listed separately from the substantive ones.</li>
<li>ALL substantive errata are generally expected to have corresponding test(s) (such as a pull request in <a href='https://github.com/web-platform-tests/wpt'>web-platform-tests</a>), either in the form of new tests or modifications to existing tests, or must include the rationale for why test updates are not required for the erratum.</li>
</ul>

<p>This report contains a reference to all open issues with the label <code>Errata</code>, displayed in the sections below. Each section collects the issues for a specific document, with a separate section for the issues not assigned to any.</p>

<p>If you have problems following this process, but you want nevertheless to report an error, you can also contact the staff contact of the Working Group, <a href="mailto:atsushi@w3.org">Atsushi Shimono</a>.</p>

<p>Note: Following <a href="https://www.w3.org/TR/2026/REC-ttml-imsc1.3-20260521/">publication of IMSC 1.3 as Recommendation</a>, this errata page has been turned into manually edited but not dynamically updated using data from GitHub.</p>
</section>
</header>

<div class="toc" id="toc">
<h2 id="toctitle" class="tocvisible">Table of content</h2>
<ul class="toc toclevel2">
<li><span class="tocnumber tocvisible">1. </span><a href="#id_1">Open Errata on the “TTML Profiles for Internet Media Subtitles and Captions 1.1” Recommendation</a>
<ul class="toc toclevel2">
<li><span class="tocnumber">1.1. </span><a href="#id_1.1">Substantive Issues</a></li>
<li><span class="tocnumber">1.2. </span><a href="#id_1.2">Editorial Issues</a></li>
</ul>
</li>
</ul>
</div>

<main>
<!-- The data-erratalabel should include one label that filters the errata -->
<section data-errata-label='imsc1.1'>
<h1>Open Errata on the “TTML Profiles for Internet Media Subtitles and Captions 1.1” Recommendation</h1>
<dl>
<dt>Latest Published Version:</dt>
<dd><a href="https://www.w3.org/TR/ttml-imsc1.1/">https://www.w3.org/TR/ttml-imsc1.1/</a></dd>
<dt>Editor’s draft:</dt>
<dd><a href="https://w3c.github.io/imsc/imsc1/spec/ttml-ww-profiles.html">https://w3c.github.io/imsc/imsc1/spec/ttml-ww-profiles.html</a></dd>
<dt>Latest Publication Date:</dt>
<dd>8 November 2018, edited in place 27 April 2020</dd>
</dl>
<section id="first">
<h2>Substantive Issues</h2>
</section>
<section id="last">
<h2>Editorial Issues</h2>
<div class="issue">
<h3>"Errata on non-prohibition of partially supported features"</h3>
<p><span class="what">Issue number:</span> <a href="https://github.com/w3c/imsc/issues/500">#500</a><br>
<span class="what">Raised by:</span><a href="https://api.github.com/users/palemieux">@palemieux</a><br>
<span class="what">Extra Labels:</span> imsc1.1<br></p><p><span class="what"><a href="https://github.com/w3c/imsc/issues/500">Initial description:</a></span> See https://github.com/w3c/imsc/issues/488</p>
<p><span class="what"><a href="https://github.com/w3c/imsc/issues/500#issuecomment-562895784">Erratum summary:</a></span>
The following paragraph is added to Section 4:
&gt; A Feature or Extension designated as _partially supported_ is neither completely _prohibited_ nor
&gt; completely _permitted_. Instead, the disposition of each of its subset _Feature_ or _Extension_ is specified
&gt; individually.
</p>
</div>
<div class="issue">
<h3>"Errata to correct disposition of #bidi in IMSC 1.1"</h3>
<p><span class="what">Issue number:</span> <a href="https://github.com/w3c/imsc/issues/498">#498</a><br>
<span class="what">Raised by:</span><a href="https://api.github.com/users/palemieux">@palemieux</a><br>
<span class="what">Extra Labels:</span> imsc1.1<br></p><p><span class="what"><a href="https://github.com/w3c/imsc/issues/498">Initial description:</a></span> See https://github.com/w3c/imsc/issues/491</p>
<p><span class="what"><a href="https://github.com/w3c/imsc/issues/498#issuecomment-562895537">Erratum summary:</a></span> The disposition of the `#bidi` feature in the _Image Profile_ is modified to:
_Partially supported via `#writingMode-horizontal`_</p>
</div>
<div class="issue">
<h3>"Incompatible SMPTE ST 2052-1:2013 extension namespace name"</h3>
<p><span class="what">Issue number:</span> <a href="https://github.com/w3c/imsc/issues/512">#512</a><br>
<span class="what">Raised by:</span><a href="https://api.github.com/users/palemieux">@palemieux</a><br>
<span class="what">Extra Labels:</span> imsc1.1<br></p>
<p><span class="what"><a href="https://github.com/w3c/imsc/issues/512">Initial description:</a></span> SMPTE ST 2052-1:2013 (SMPTE-TT) modified the extension namespace name originally defined in SMPTE ST 2052-1:2010, from `http://www.smpte-ra.org/schemas/2052-1/2010/smpte-tt` to `http://www.smpte-ra.org/schemas/2052-1/2013/smpte-tt`. [ed.: It is not clear why this change was made.]
IMSC 1.0.1 and IMSC 1.1 use `http://www.smpte-ra.org/schemas/2052-1/2010/smpte-tt` exclusively for the smpte:backgroundImage attribute.
IMSC 1.0.1 references undated SMPTE ST 2052-1.
IMSC 1.1 references SMPTE ST 2052-1:2013.</p><p><span class="what"><a href="https://github.com/w3c/imsc/issues/512#issuecomment-562895873">Erratum summary:</a></span>
The normative reference:
&gt; SMPTE ST 2052-1:2013 "Timed Text Format (SMPTE-TT)". SMPTE. URL: https://doi.org/10.5594/SMPTE.ST2052-1.2013
is modified to read:
&gt; SMPTE ST 2052-1:2010 "Timed Text Format (SMPTE-TT)". SMPTE. URL: https://doi.org/10.5594/SMPTE.ST2052-1.2010</p>
</div>
<div class="issue">
<h3>"#extent-root implies support for #extent-auto"</h3>
<p><span class="what">Issue number:</span> <a href="https://github.com/w3c/imsc/issues/489">#489</a><br>
<span class="what">Raised by:</span><a href="https://api.github.com/users/skynavga">@skynavga</a><br>
<span class="what">Extra Labels:</span> imsc1.1<br></p>
<p><span class="what"><a href="https://github.com/w3c/imsc/issues/489">Initial description:</a></span> IMSC1.0 specifies that #extent-root is permitted, and #extent-root implies support for #extent-auto (see note in TTML2 §E.1.92); however, IMSC1.1 does not include #extent-auto in §6, which would mean that #extent-auto is prohibited in IMSC1.1. This makes IMSC1.1 incompatible with both IMSC1.0 and TTML2 regarding the semantics of #extent-root.</p>
<p><span class="what"><a href="https://github.com/w3c/imsc/issues/489#issuecomment-562895235">Erratum summary:</a></span>
&gt; 8.4.2 #extent-region
&gt; The tts:extent attribute SHALL be present on all region elements, where it SHALL use px units, percentage values, or root container relative units.
is replaced with:
&gt; 8.4.2 #extent-region
&gt; For each region element defined in the Document Instance, the [specified value](https://www.w3.org/TR/ttml2/#semantics-style-resolved-value-category-specified) of the tts:extent style property SHALL consist of two length expressions
&gt; that use pixel (px), percentage (%), or root container relative units.
</p>
</div>
</section>
</section>
</main>

<footer>
<address><a href="mailto:pal@sandflow.com" class=''>Atsushi Shimono</a>, &lt;atsushi@w3.org&gt;, (W3C)</address>
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