Summary of OGC Web Services in MapServer Jeff McKenna Gateway Geomatics
MapServer Supports: WMS (server/client)
SLD
WFS (server/client)
GML
Filter Encoding
WCS (server)
WMC
SOS (server)
OGC Compliance Passed tests for WMS 1.1.1 and 1.3.0 Certification pending, for 5.6.0 release Ongoing testing for WFS 1.0.0 and 1.1.0*
WCS 1.0.0* and 1.1.0*
SOS 1.0.0
WMC 1.1.0 Track our progress in the Trac Wiki at  http://trac.osgeo.org/mapserver/wiki/MapServerOGCCITECompliance
MapServer Support Notes: Requires a regular MapServer .map file, with additional simple metadata
Since v4.4 (2004), "ows_*" metadata can be used for common metadata items shared by multiple OGC interfaces (e.g. ows_title vs wms_title + wfs title)
WMS Provides images of map data
2001: Initial implementation, thanks to funding from NRCan's Canadian Forest Service (CFS)

Summary of OGC Support by MapServer