clarify status of line breaks

index.html

@@ -923,8 +923,9 @@ <h4>Text</h4>
           <p>A <a>Text</a> object is represented in a <a>DAPT Document</a> by a <code>&lt;p&gt;</code> element with the following constraints:</p>
             <ul>
               <li>The <a>Text</a> of the <a>Script Event</a> is represented by the character content
-              of the <code>&lt;p&gt;</code> and of its descendants, and after applying White Space Handling
-              as defined in [[!XML]].
+              of the <code>&lt;p&gt;</code> and of its descendants,
+              where &lt;br&gt; elements are considered to represent new lines,
+              and after applying White Space Handling as defined in [[!XML]].
                 <aside class="note">The text content of the paragraph can be structured using TTML elements such as
                   <code>&lt;br&gt;</code> or <code>&lt;span&gt;</code>
                   which can include or reference TTML style attributes