title: what actually is PCDATA and CDATA?
body: <p>it seems that a loose definition of PCDATA and CDATA is that</p>
  
  <ol>
  <li>PCDATA is character data, but <em>is</em> to be parsed.  </li>
  <li>CDATA is character data, and <em>is not</em> to be parsed.</li>
  </ol>
  
  <p>but then someone told me that CDATA is actually parsed or PCDATA is actually not parsed...  so it is a bit of a confusion.  Does anyone know the real deal is?</p>
  
  <p><strong>Update</strong>: I actually added the PCDATA definition on Wikipedia... so don't take that answer too seriously as that's only my rough understanding of it.</p>