declare namespace gml = "http://www.opengis.net/gml";
      spatial:getEPSG4326WKT(
        <gml:Polygon srsName="osgb:BNG" xmlns:gml='http://www.opengis.net/gml'>
          <gml:outerBoundaryIs><gml:LinearRing>
	    <gml:coordinates>
	      278200,187600 278400,187600 278400,188000 278200,188000 278200,187600
	    </gml:coordinates>
	  </gml:LinearRing>
	</gml:outerBoundaryIs>
      </gml:Polygon>)