Schematron validation observationCoverage.xsd An implementation of the OandM model for SWE This document contains specializations of the basic observation pattern, fixing the type of the result to be various discrete coverage types. Observation Extensions is an OGC Standard. Copyright (c) 2007,2008,2010 Open Geospatial Consortium, Inc. All Rights Reserved. To obtain additional rights of use, visit http://www.opengeospatial.org/legal/ . cv:CV_DiscreteCoverage must be present as child of om:result one and only one child element must be present Specialized Observation, in which the result is a generalized discrete coverage cv:CV_DiscretePointCoverage must be present as child of om:result one and only one child element must be present Specialized Observation, in which the result is a point coverage which samples a property at points in the feature of interest cv:CV_DiscreteTimeInstantCoverage must be present as child of om:result one and only one child element must be present Specialized Observation, in which the result is a time-instant coverage which samples a property of the feature of interest at different times cv:CV_DiscreteElementCoverage must be present as child of om:result one and only one child element must be present Specialized Observation, in which the result is a coverage whose domain elements contain references to objects encoded elsewhere, which provide the sampling geometry of the feature of interest