Type describing the abstract superclass for vegetation objects. A subclass is either a SolitaryVegetationObject or a PlantCover. Type describing Plant Covers resp. Biotopes. As subclass of _CityObject, a VegetationObject inherits all attributes and relations, in particular an id, names, external references, and generalization relations. Class of a PlantCover. The values of this type are defined in the XML file PlantCoverClassType.xml, according to the dictionary concept of GML3. Function of a PlantCover. The values of this type are defined in the XML file PlantCoverFunctionType.xml, according to the dictionary concept of GML3. Type describing solitary vegetation objects, e.g., trees. Its geometry is either defined explicitly by a GML 3 geometry with absolute coordinates, or in the case of multiple occurences of the same vegetation object, implicitly by a reference to a shape definition and a transformation. The shape definition may be given in an external file. As subclass of _CityObject, a SolitaryVegetationObject inherits all attributes and relations, in particular an id, names, external references, and generalization relations. Class of a SolitaryVegetationObject. The values of this type are defined in the XML file PlantClassType.xml, according to the dictionary concept of GML3. Function of a PlantType. The values of this type are defined in the XML file PlantFunctionType.xml, according to the dictionary concept of GML3. Type of a Species. The values of this type are defined in the XML file SpeciesType.xml, according to the dictionary concept of GML3.