ad:AbstractBuilding.numberOfBuildingUnits
http://inspire.ec.europa.eu/ont/bu-base#AbstractBuilding.numberOfBuildingUnits
rdfs:comment
http://www.w3.org/2000/01/rdf-schema#comment
Building units are spatial obj ...... composed of zero BuildingUnit.
@en
graph:default
https://triplydb.com/inspire/bu-base/graphs/default