title: DTD: elements #PCDATA with default value, can be?
body: <p>I have an element that can be "16:9" or "4:3", is it possible to write something like this:</p>
  
  <p><code>&lt;!ELEMENT element_name (16:9|4:3)&gt;</code> ? </p>
  
  <p>Eclipse gives me error with every way I've tried.</p>