title: Invalid location of html tag <command> in Eclipse
body: <p>Given the code:</p>
  
  <pre><code>&lt;!doctype html&gt;
  &lt;html&gt;
  &lt;body&gt;
  &lt;menu id="html5menu" type="context" style="display:none" class="showcase"&gt;
    &lt;command label="rotate" onclick="alert('rotate')"&gt;&lt;/command&gt;
    &lt;command label="resize" onclick="alert('resize')"&gt;&lt;/command&gt;
    &lt;menu label="share"&gt;
      &lt;command label="twitter" onclick="alert('twitter')"&gt;&lt;/command&gt;
      &lt;hr&gt;
      &lt;command label="facebook" onclick="alert('facebook')"&gt;&lt;/command&gt;
    &lt;/menu&gt;
  &lt;/menu&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>I get a warning in Eclipse:</p>
  
  <pre><code>Invalid location of tag (command).
  </code></pre>
  
  <p>According to the examples I have found in the web the tag is being used correctly. Is this an Eclipse 'false' warning or am I missing something?</p>