SOS is an OGC Standard. Copyright (c) 2012 Open Geospatial Consortium. To obtain additional rights of use, visit http://www.opengeospatial.org/legal/ . request to retrieve observation data om:OM_Process pointer to a procedure for which observations are requested. It defines a filter for the procedure property of the observations sos:ObservationOffering pointer to an ObservationOffering advertised in the Capabilities document for which observations are requested pointer to an observedProperty for which observations are requested specifies a filter for a time property of requested observations. The supported time range for the phenomenonTime property of observations is listed in the selected ObservationOffering. The supported temporal operands and operators are listed in the FilterCapabilities section of the Capabilities document. gml:AbstractFeature pointer to a feature of interest for which observations are requested specifies a filter which applies to a spatial property of an observation. This property is defined in the valueReference element of the SpatialOperator. identifier of desired responseFormat for the requested observations. The supported responseFormats are listed in the ObservationOffering. response with observation data matching the request criteria observation which fulfills the GetObservation request