mapnik/tests/data/good_maps/polygon_symbolizer.xml

<Map background-color="transparent" srs="+proj=longlat +ellps=airy +datum=OSGB36 +no_defs" minimum-version="0.7.2">

  <FileSource name="foo">../images/</FileSource>
  
  <Style name="test">
    <Rule>
      <PolygonSymbolizer fill="lavender" fill-opacity=".5"/>
      <PointSymbolizer base="foo" file="dummy.png"/>
    </Rule>  
  </Style>

  <Layer name="lay" srs="+proj=longlat +ellps=airy +datum=OSGB36 +no_defs">
    <StyleName>test</StyleName>
    <Datasource>
      <Parameter name="type">shape</Parameter>
      <Parameter name="base">../../data/shp/</Parameter>
      <Parameter name="file">poly.shp</Parameter>
    </Datasource>
  </Layer>
  
</Map>