title: Dtd XML Elements in any order and any number
body: <p>I need to write a dtd for the first time. I have being reading for a while and the only solution I could come up to have any number of elements of any type is the following. </p>
  
  <pre><code> &lt;!ELEMENT sentence ((word?,punc?)*)&gt;
  </code></pre>
  
  <p>It looks very fishy to me. Does anyone know a better way? Does this really does what I want?</p>
  
  <p>Thanks in advance</p>
  
  <p>Altober</p>