Element el = element.getExtension(QNAME_W3C_LAT);
if (el != null)
el.discard();
el = element.getExtension(QNAME_W3C_LONG);
if (el != null)
el.discard();
Point point = (Point)position;
ExtensibleElement p = element.addExtension(QNAME_W3C_POINT);
p.addSimpleExtension(QNAME_W3C_LAT, Double.toString(point.getCoordinate().getLatitude()));
p.addSimpleExtension(QNAME_W3C_LONG, Double.toString(point.getCoordinate().getLongitude()));