This XML Schema defines the DescribeObservationType request and response XML elements and types. SOS is an OGC Standard. Copyright (c) 2006,2010 Open Geospatial Consortium, Inc. All Rights Reserved. To obtain additional rights of use, visit http://www.opengeospatial.org/legal/ . Request to a SOS to perform the DescribeObservationTypeoperation. This operation is designed to request detailed information concerning hard typed observation schemas The phenomenon for which the observationType (OM application schema) is requested.