>
</blockquote>
<p>These policies are mostly hidden from view and users generally need not know 
  about them. Advanced users might however provide their own policies that override 
  the ones that are already in place to fine tune the parsing process 
  to fit their own needs. We shall see how this can be done. This will be covered 
  in further detail later.</p>
<p>The <tt>scanner</tt> is a template class expecting two parameters: <tt>IteratorT</tt>, 
  the iterator type and <tt>PoliciesT</tt>, its set of