example WMS POST

WMS_POST_SearchParams.xml

<?xml version="1.0" encoding="UTF-8"?>
<ogc:GetMap xmlns:ogc="http://www.opengis.net/ows"
            xmlns:gml="http://www.opengis.net/gml"
            version="1.1.1" service="WMS">
   <StyledLayerDescriptor version="1.0.0">
      <NamedLayer>
        <Name>wqp_sites</Name>
        <NamedStyle><Name>wqp_sources</Name></NamedStyle> 
      </NamedLayer> 
   </StyledLayerDescriptor>
   <BoundingBox srsName="http://www.opengis.net/gml/srs/epsg.xml#4326">
      <gml:coord><gml:X>-130</gml:X><gml:Y>24</gml:Y></gml:coord>
      <gml:coord><gml:X>-55</gml:X><gml:Y>50</gml:Y></gml:coord>
   </BoundingBox>
   <Output>
      <Format>image/png</Format>
      <Size><Width>550</Width><Height>250</Height></Size>
   </Output>
   <ogc:Vendor>
     <ogc:PropertyIsEqualTo>
        <ogc:PropertyName>searchParams</ogc:PropertyName>
        <ogc:Literal>statecode:US%3A01;countycode:US%3A01%3A005%7CUS:01%3A007%7CUS%3A01%3A017;siteType:Stream%7CWell;sampleMedia:Water%7CSediment</ogc:Literal>
      </ogc:PropertyIsEqualTo>
   </ogc:Vendor>
</ogc:GetMap>