de> are
   propagated to all subsequently created databases. Because of this,
   avoid creating objects in <code class="literal">template1</code> unless you want them
   propagated to every newly created database.
   <code class="literal">template0</code> is meant as a pristine copy of the original
   contents of <code class="literal">template1</code>.  It can be cloned instead
   of <code class="literal">template1</code> when it is important to make a database
   without any such site-local additions.  Mor