title: Eclipse does not recognize some valid attributes and tags
body: <p>Take this html (ignoring placeholder values "..."):</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;  
  &lt;html&gt;  
  &lt;head&gt;  
  &lt;title&gt;...&lt;/title&gt;  
  &lt;/head&gt;  
  &lt;body&gt;  
  &lt;svg class="..." width="..." height="..."&gt;  
      &lt;path transform="..." d="..." /&gt;  
  &lt;/svg&gt;   
  &lt;/body&gt;  
  &lt;/html&gt;
  </code></pre>
  
  <p>Eclipse EE is giving me the warnings</p>
  
  <pre><code>- undefined attribute name (width)  
  - undefined attribute name (height)  
  - unknown tag (path)
  </code></pre>
  
  <p>Oddly, the output seems fine although I am not sure why it is doing this. Can anyone provide any insight?</p>
  
  <p>Edit: as an addendum, the Eclipse EE internet browser almost never draws svg graphics correctly for me, but when I use Firefox or Google Chrome for testing, the content displays correctly. Is this related?</p>