title: XML simpletype, simplecontent, complextype, complexcontent
body: <p>I'm having some confusion on the type  <code>simpletype</code>, <code>simplecontent</code>, <code>complextype</code> and <code>complexcontent</code>. </p>
  
  <p>I'm almost new to <strong>xsd</strong>. Can someone help to clear the confusion that giving concrete examples.</p>