title: When implementing the FAST protocol (from FIX) when should I reset the template parser?
body: <p>I am implementing my own FAST handler/parser and some templates relies on a previous value of a field, like the <em>copy</em> operation that says: <em>If not present, use the last/previous value received.</em></p>
  
  <p>Every field has a reset method that clears the previous value of the field.</p>
  
  <p>According to this link: <a href="http://jettekfix.com/node/44" rel="nofollow">http://jettekfix.com/node/44</a></p>
  
  <p>You should reset the template after you process every message. Now that's a contradiction, in other words, how am I going to use the previous value of a field if I am resetting it after every message???</p>
  
  <p>I must be missing something here. When should I reset the template parser?</p>