<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE Map[]>
<Map>
<Style name="world" filter-mode="first" >
  <Rule>
    <Filter>([data_column] &gt;= 100)</Filter>
    <PolygonSymbolizer fill="#0000ff" />
  </Rule>
  <Rule>
    <Filter>([data_column] = null)</Filter>
    <PolygonSymbolizer fill="#ff0000" fill-opacity="0.5" />
  </Rule>
  <Rule>
    <PolygonSymbolizer fill="#808080" />
  </Rule>
</Style>
<Layer name="world">
    <StyleName>world</StyleName>
</Layer>
<Style name="sea" filter-mode="first" >
  <Rule>
    <Filter>([data_column] &gt;= 100)</Filter>
    <PolygonSymbolizer fill="#0000ff" />
  </Rule>
  <Rule>
    <Filter>([data_column] = null)</Filter>
    <PolygonSymbolizer fill="#ff0000" />
  </Rule>
  <Rule>
    <PolygonSymbolizer fill="#808080" />
  </Rule>
</Style>
<Layer name="sea">
  <StyleName>sea</StyleName>
</Layer>

</Map>
