samplingFeature.xsd Observations and Measurements - XML Implementation is an OGC Standard. Copyright (c) [2010] Open Geospatial Consortium. To obtain additional rights of use, visit http://www.opengeospatial.org/legal/. If present, the sub-element 'type' shall indicate the class of spatial sampling feature. A register of type identifiers corresponding with the sampling feature types in ISO 19156 is provided by OGC at http://www.opengis.net/def/samplingFeatureType/OGC-OM/2.0/ A sampling feature is established in order to make observations concerning some domain feature. The association Intention shall link the SF_SamplingFeature to the feature which the sampling feature was designed to sample. The target of this association has the role sampledFeature with respect to the sampling feature, and shall not be a sampling feature. It is usually a real-world feature from an application domain (Figures 5 and 10). If present, the attribute lineage:LI_Lineage shall describe the history and provenance of the SF_SamplingFeature. This might include information relating to the handling of the specimen, or details of the survey procedure of a spatial sampling feature. Sampling features are distinctive compared with other features from application domains by having navigable associations to observations. If present, the association Design shall link the SF_SamplingFeature to an OM_Observation that was made utilizing the sampling feature, and the description of the sampling feature provides an intrinsic element of the observation protocol, along with the observation procedure (6.2.2.10) and the decomposition of the domain geometry in the case of a coverage-valued result (7.3.1). The OM_Observation has the role relatedObservation with respect to the sampling feature. Multiple observations may be made on a single sampling feature. Sampling features are frequently related to each other, as parts of complexes, through sub-sampling, and in other ways. If present, the association class SamplingFeatureComplex (Figure 9) shall link a SF_SamplingFeature to another SF_SamplingFeature. If present, the attributes parameter:NamedValue shall describe an arbitrary parameter associated with the SF_SamplingFeature. This might be a parameter that qualifies the interaction with the sampled feature, or an environmental parameter associated with the sampling process. A "SamplingFeature" is a feature used primarily for taking observations. A "SamplingFeatureRelation" is used to describe relationships between sampling features, including part-whole, siblings, etc. The class SF_SamplingFeatureCollection (Figure 9) is an instance of the «metaclass» GF_FeatureType (ISO 19109:2005), which therefore represents a feature type. SF_SamplingFeatureCollection shall support one association. The association Collection shall link a SF_SamplingFeatureCollection to member SF_SamplingFeatures. The purpose of a sampling feature process is to generate or transform a sampling feature. The model for SF_Process is abstract, and has no attributes, operations, or associations. Any suitable XML may be used to describe the sampling feature process in line, provided that it is contained in a single XML element. If reference to a schema is provided it must also be valid. Any suitable XML may be used to describe the sampling feature process in line, provided that it is contained in a single XML element. If refernece to a schema is provided it must also be valid.