<!-- Description: "Modell of the Fraunhofer TWINHOUSE (http://www.ibp.fraunhofer.de/en/Expertise/Energy_Systems/Test_Facilities.html#Twin buildings) , LOD4 -->
<!-- Usage: Geometric testmodel for dynamic energy modeling, Interface Definition -->
<!-- Project: CI-NERGY -->
<!-- Validated: Yes-->
<!-- Validation Comments:
ClosureSurfaces which are redundant via XLINK will get an ID- extension [_XLINK] in order to avoid redundancy in IDs within the CityGML file, unclear trouble with BuildingSolid thus deactivated -->