title: Double-Asterisk Comment Notation in XML
body: <p>Is it valid to use a double-asterisk to indicate a line-comment in XML?  I see this a lot in the XML files I've been assigned to parse.</p>
  
  <p>Example:</p>
  
  <pre><code>&lt;/someClosingTag&gt;
  ** This is my line comment in an XML file.
  &lt;someOpeningTag&gt;
  </code></pre>