title: Unable to #import<Foundation/NSXMLDocument.h>
body: <p>I am going to use <code>NSXMLElement</code> in my project, so I tried to </p>
  
  <pre><code>#import &lt;Foundation/NSXMLDocument.h&gt; 
  </code></pre>
  
  <p>but it gives an error: "No such file or directory." How can I include this?</p>