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641511829[Tools] Require non-CSS UAs to honour the default style sheet too.2011-08-11 02:56
@@ -104409,20 +104409,32 @@ document.body.appendChild(text);
    <li>the 'visibility' property's 'collapse' value unless it is being treated as equivalent to the 'hidden' value, or</li>
    <li>some equivalent in other styling languages.</li>
   </ul>
 
   <p class="note">Just being off-screen does not mean the element is
   not <span>being rendered</span>. The presence of the <code
   title="attr-hidden">hidden</code> attribute normally means the
   element is not <span>being rendered</span>, though this might be
   overridden by the style sheets.</p>
 
+  <hr>
+
+  <p>User agents that do not honor author-level CSS style sheets are
+  nonetheless expected to act as if they applied the CSS rules given
+  in these sections in a manner consistent with this specification and
+  the relevant CSS and Unicode specifications. <a
+  href="#refsCSS">[CSS]</a> <a href="#refsUNICODE">[UNICODE]</a> <a
+  href="#refsBIDI">[BIDI]</a></p>
+
+  <p class="note">This is especially important for issues relating to
+  the 'display', 'unicode-bidi', and 'direction' properties.</p>
+
 
 
   <h3>The CSS user agent style sheet and presentational hints</h3>
 
   <p>The CSS rules given in these subsections are, except where
   otherwise specified, expected to be used as part of the user-agent
   level style sheet defaults for all documents that contain <span>HTML
   elements</span>.</p>
 
   <p>Some rules are intended for the author-level zero-specificity

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