title: How can I tell if the following Web page source code is XHTML, HTML or XML?
body: <p>I am working with this Web Page for improving my programming skills:</p>
  
  <pre><code>http://www.studenti.ict.uniba.it/esse3/ListaAppelliOfferta.do
  </code></pre>
  
  <p>If you take a look at its source code, you can see HTML peculiar tags like </p>
  
  <pre><code>&lt;head&gt; &lt;body&gt; &lt;title&gt;
  </code></pre>
  
  <p>The question is: I am quite sure this page is not in XML, so is it simple HTML or XHTML?</p>
  
  <p>According to my knowledge those two are quite similar.</p>
  
  <p>How can I tell which of the two it is? If I must choose I'd say simple HTML (5 or 4) but I am not 100% sure!</p>