service

              The service attribute is included to support service 
              endpoints that implement more than one OGC service.
              For example, a single CGI that implements WMS, WFS
              and WCS services. 
              The endpoint can inspect the value of this attribute 
              to figure out which service should process the request.
              The value WFS indicates that a web feature service should
              process the request.
              This parameter is somewhat redundant in the XML encoding
              since the request namespace can be used to determine
              which service should process any give request.  For example,
              wfs:GetCapabilities and easily be distinguished from
              wcs:GetCapabilities using the namespaces.