GetCapabilities (GET):

http://sg.geodatenzentrum.de/wfs_info?REQUEST=GetCapabilities&VERSION=1.3.0&SERVICE=wfs

GetFeature (GET):

http://sg.geodatenzentrum.de/wfs_info?SERVICE=WFS&REQUEST=GetFeature&VERSION=2.0.0&TYPENAMES=info:dtk250&COUNT=10

GetFeature (POST):

http://sg.geodatenzentrum.de/wfs_info

<wfs:GetFeature version="1.0.0" service="WFS" outputFormat="GML2" xmlns:wfs="http://www.opengis.net/wfs" xmlns:ogc="http://www.opengis.net/ogc" xmlns:gml="http://www.opengis.net/gml" xmlns:gn="http://www.geodatenzentrum.de/gnde" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.0.0/WFS-basic.xsd"> <wfs:Query typeName="info:dtk50"> <ogc:Filter> <ogc:PropertyIsEqualTo> <ogc:PropertyName>ID</ogc:PropertyName> <ogc:Literal>L2406</ogc:Literal> </ogc:PropertyIsEqualTo> </ogc:Filter> </wfs:Query> </wfs:GetFeature>