title: Asterisks in XML attribute value
body: <p>I have an XHTML file, with this line:</p>
  
  <pre><code>&lt;tr id="some-string-with-a-*"&gt;
  </code></pre>
  
  <p>and I get the validation error:</p>
  
  <blockquote>
    <p>Syntax of value for attribute id of tr is not valid</p>
  </blockquote>
  
  <p>I changed it to <code>&amp;#42;</code> and I still get the same error.<br>
  Any suggestions?</p>