--- a/ttml10-sdp-us/Overview.html	Fri Sep 21 14:18:53 2012 +0800
+++ b/ttml10-sdp-us/Overview.html	Fri Sep 21 14:45:42 2012 +0800
@@ -691,18 +691,21 @@
 </section>
 <section class='Core_Constraints'>
 <h4>Constraints</h4>
-<p data-transform='constraint'>Processors MUST support the capability to present documents in the following common forms:</p>
+<p data-transform='constraint'>deleted</p>
+</section>
+<section class='informative'>
+<h4>Examples</h4>
+<p>This profile supports the following caption styles:</p>
 <ul>
 <li>Pop-up</li>
 <li>Roll-up</li>
 <li>Paint-on</li>
 </ul>
-<div class="note"><p>Pop-up style captions are typically characterized by small blocks of text that appear all at once.</p></div>
-<div class="note"><p>Roll-up style captions are typically characterized by words (or small groups of letters) appearing sequentially,
-so that a line fills up incrementally, and then as new lines are added the upper lines are scrolled out of view.</p></div>
-<div class="note"><p>A Paint-on caption typically appears on the screen one character at a time and is displayed like a Pop-up caption.</p></div>
-<p>Examples are provided of each style to aid in understanding the common forms.</p>
-<section>
+<p>Pop-up style captions are typically characterized by small blocks of text that appear all at once.</p>
+<p>Roll-up style captions are typically characterized by words (or small groups of letters) appearing sequentially,
+so that a line fills up incrementally, and then as new lines are added the upper lines are scrolled out of view.</p>
+<p>A Paint-on caption typically appears on the screen one character at a time and is displayed like a Pop-up caption.</p>
+<p>These caption styles are further elucidated by examples below.</p>
 <p data-transform='example'>Pop-up style</p>
 <pre class="example" style="font-family: Segoe UI; font-size: 13pt; color: black; background: white;">
  
@@ -824,7 +827,6 @@
 <div class="note"><p>As shown in the Roll-up example, a function of time for a k line Roll-up of content: The begin time of the N+kth p element is equal to the begin time plus duration of the Nth p element less the begin time of the first span in the N+kth p.</p></div>
 </section>
 </section>
-</section>
 <section id='Constrained_TTML_Feature_display_display_fontFamily_generic'>
 <h2>Use of Constrained TTML Feature <span data-transform='term'>fontFamily-generic</span></h2>
 <p></p>