<config>
   <preferences operation="delete-values">
    <!-- delete Mapnik layers -->
    <maps key='imagery.entries'>
    <map>
      <!-- you do not need to list all key-value pairs to delete corresponding map-->
      <tag key='type' value='tms'/>
      <tag key='url' value='http://tile.openstreetmap.org/{zoom}/{x}/{y}.png'/>
    </map>
    <map>
      <tag key='name' value='OpenStreetMap (черно-белый Mapnik)'/>
    </map>
    </maps>


  <!-- following items will be removed from list -->
  <list key='imagery.layers.default'>
    <entry value='http://tile.openstreetmap.org/{zoom}/{x}/{y}.png'/>
    <entry value='http://{switch:a,b,c}.www.toolserver.org/tiles/bw-mapnik/{zoom}/{x}/{y}.png'/>
  </list>

   </preferences>

   <!-- will be performed only after default value is known -->
   <preferences operation="delete-values">
	<list key="draw.anglesnap.angles">
	    <entry value='75'/>
	</list>
   </preferences>

  <preferences operation="delete-values">

   <!-- remove list, containing Potlatch 2 -->

  <lists key='mappaint.style.sources-list'>
    <list>
      <entry value='Potlatch 2'/>
    </list>
  </lists>
   </preferences>

</config>