bu-core3d:BuildingGeometry3DLoD.verticalGeometryReference3DBottom
http://inspire.ec.europa.eu/ont/bu-core3d#BuildingGeometry3DLoD.verticalGeometryReference3DBottom
skos:definition
http://www.w3.org/2004/02/skos/core#definition
Height level to which the lowe ...... horizontal polygon) refers to.
@en
graph:default
https://triplydb.com/inspire/bu-core3d/graphs/default