wfs:DefaultSRS

                        The DefaultSRS element indicated which spatial
                        reference system shall be used by a WFS to
                        express the state of a spatial feature if not
                        otherwise explicitly identified within a query
                        or transaction request.  The SRS may be indicated
                        using either the EPSG form (EPSG:posc code) or
                        the URL form defined in subclause 4.3.2 of
                        refernce[2].