me">PostgreSQL</span> developers and other
  volunteers in parallel to the development of the
  <span class="productname">PostgreSQL</span> software.  It describes all
  the functionality that the current version of
  <span class="productname">PostgreSQL</span> officially supports.
 </p><p>
  To make the large amount of information about
  <span class="productname">PostgreSQL</span> manageable, this book has been
  organized in several parts.  Each part is targeted at a different
  class of users, or at use