--- a/ttml1/spec/ttml1-errata.html	Thu Apr 24 07:38:19 2014 -0700
+++ b/ttml1/spec/ttml1-errata.html	Thu Apr 24 12:10:30 2014 -0600
@@ -42,16 +42,11 @@
         Text (TT) Working Group</a> as part of the W3C <a href="http://www.w3.org/2008/WebVideo/">Video
         in the Web Activity</a>.</p>
     <p>This document lists the known errata to the <a href="http://www.w3.org/TR/2013/REC-ttml1-20130924/">TTML1
-        Recommendation</a><br />
-      Each entry has the following information:</p>
+        Recommendation</a>. Each entry has the following information:</p>
     <ul>
-      <li>A unique entry number</li>
+      <li>The section referenced by the erratum.</li>
+      <li>A description of the problem and correction if applicable.</li>
       <li>The date it was added to the errata page.</li>
-      <li>Whether the entry is considered an important error, a minor
-        typographical error, a clarification, or a known problem with the
-        document itself.</li>
-      <li>The section referred to.</li>
-      <li>A description of the problem and correction if applicable.</li>
     </ul>
     <p>Please send general comments about this document to the public mailing
       list <a href="mailto:public-tt@w3.org">public-tt@w3.org</a> (<a href="mailto:public-tt-request@w3.org">subscribe</a>,
@@ -61,24 +56,36 @@
       marked <span class="diff-del">thus</span>. Changed text marked <span class="diff-chg">thus</span>.</p>
     <h2 id="errors">Known errors as of 30 January 2014</h2>
     <ul>
-      <li><a href="#errata-5.2-1">E01: Correction in in TTML1 Section 5.2 Profiles</a>
-          (published 30 01 2014)</li>
-      <li><a href="#errata-C-1">E02: Correction in TTML1 Appendix C - Media Type
-          Registration</a> (published 30 01 2014)</li>
-      <li><a href="#errata-M-1">E03: Correction in TTML1 Appendix M - Concrete
-          Encoding</a> (published 20 02 2014)</li>
+      <li><a href="#errata-5.2-1">Correction in TTML1 Section 5.2 Profiles</a>
+          (published 2014-01-30)</li>
+      <li><a href="#errata-10.2.3-1">Correction in TTML1 Section 10.2.3 Duration (dur) Attribute</a>
+          (published 2014-04-24)</li>
+      <li><a href="#errata-C-1">Correction in TTML1 Appendix C - Media Type
+          Registration</a> (published 2014-01-30)</li>
+      <li><a href="#errata-M-1">Correction in TTML1 Appendix M - Concrete
+          Encoding</a> (published 2014-02-20)</li>
     </ul>
-    <h2>Erratas:</h2>
-    <p id="errata-5.2-1"><strong> E01: </strong><a href="http://www.w3.org/TR/2013/REC-ttml1-20130924/#vocabulary-profiles">Correction
-        in TTML1 Section 5.2 Profiles</a> (published 30 01 2014) </p>
+    <h2>Errata</h2>
+    <hr />
+    <p id="errata-5.2-1">Correction
+        in <a href="http://www.w3.org/TR/2013/REC-ttml1-20130924/#vocabulary-profiles">TTML1 Section 5.2 Profiles</a> (published 2014-01-30) </p>
     <p class="description"><span class="title-description">Description</span>:</p>
     Minor typographical error, in the third paragraph under Table 2.
     <p class="description"><em><strong><span class="title-correction">Resolution</span></strong></em>:</p>
     <p>change "... and must not <span class="diff-del">be </span>appear ..."</p>
     <p>to read "... and must not appear ...".</p>
     <hr />
-    <p id="errata-C-1"><strong>E02: </strong><a href="http://www.w3.org/TR/2013/REC-ttml1-20130924/#media-types-registration">Correction
-        in TTML1 Appendix C - Media Type Registration</a> (published 30 01 2014)</p>
+    <p id="errata-10.2.3-1">Correction
+        in <a href="http://www.w3.org/TR/2013/REC-ttml1-20130924/#timing-attribute-dur">TTML1 Section 10.2.3 - dur attribute</a> (published 2014-04-24) </p>
+    <p class="description"><span class="title-description">Description</span>:</p>
+    Add clarification about use of zero duration.
+    <p class="description"><em><strong><span class="title-correction">Resolution</span></strong></em>:</p>
+    <p>Add the following sentence to the last paragraph (that cites [SMIL 2.1] § 10.4.1):</p>
+    <p><span class="diff-add">In a willful violation of <a href="http://www.w3.org/TR/2013/REC-ttml1-20130924/#smil21">[SMIL 2.1]</a>, § 10.4.1,
+    the value of the <code>dur</code> attribute is permitted to be zero (0).</span></p>
+    <hr />
+    <p id="errata-C-1">Correction
+        in <a href="http://www.w3.org/TR/2013/REC-ttml1-20130924/#media-types-registration">TTML1 Appendix C - Media Type Registration</a> (published 2014-01-30)</p>
     <p class="description"><span class="title-description">Description</span>:</p>
     <p class="description">Correction in the Media Type Registration wording:<br />
     </p>
@@ -230,8 +237,8 @@
       </dd>
     </dl>
     <hr />
-    <p id="errata-M-1"><strong> E03: </strong><a href="http://www.w3.org/TR/2013/REC-ttml1-20130924/#concrete-encoding">Correction
-        in TTML1 Appendix M - Concrete Encoding</a> (published 20 02 2014) </p>
+    <p id="errata-M-1">Correction
+        in <a href="http://www.w3.org/TR/2013/REC-ttml1-20130924/#concrete-encoding">TTML1 Appendix M - Concrete Encoding</a> (published 2014-02-20) </p>
     <p class="description"><span class="title-description">Description</span>:</p>
     Add standard XML named character entities unintentionally omitted from note.
     <p class="description"><em><strong><span class="title-correction">Resolution</span></strong></em>:</p>