feature: abstraction of real world phenomena <br/>NOTE: A feature may occur as a type or an instance. Feature type or feature instance should be used when only one is meant.<br/>[Victoria Terminology Harmonization Meeting]<br/><br/>This class describes how a feature class shall be constructed in an Application Schema. In accordance with the conformance clause of the standard, instances of this class are instanciated as feature classes in an Application Schema<br/>