title: Do I put the following parts in "non functional needs"?
body: <p>I am writing a <em>user requirements document</em> for an application. 
  I distinguished two chapters: one for <em>functional needs</em> and another for <em>non functional needs</em>.</p>
  
  <p>In the functional needs, I enumerated a list of functional spec. 
  Actually, I am confronted to the following situation : I have to talk about :</p>
  
  <ul>
  <li>User interface </li>
  <li>Performance  </li>
  <li>security  </li>
  <li>Data format</li>
  </ul>
  
  <p>Do I put those parts in <em>Non functional needs</em> ? </p>