The CityModel contains a generic city object - a gas tank - with two generic attributes, and a building with a generic attribute (the date of a renovation). However, the geometries do not make sense; they are only included to illustrate the document structuring. Example CityGML file - generic objects and attributes 0.0 0.0 0.0 33.0 34.0 2.5 4334.99 Type 55 gas tank 1.0 1.0 0.0 1.0 4.0 0.0 3.0 4.0 0.0 3.0 1.0 0.0 1.0 1.0 0.0 2.0 1.0 2.5 2.0 4.0 2.5 1.0 4.0 1.5 1.0 1.0 1.5 2.0 1.0 2.5 2001-11-07 1000 1080 model/vrml www.some-3D-library.com/3DCityModel/furnitures/TrafficLight434.wrl 3603845.54 5793898.77 44.8 1000 1080 model/vrml 0.866025 -0.5 0 0.5 0.5 0.866025 0 0.5 0 0 1 0 0 0 0 1 www.some-3D-library.com/3DCityModel/furnitures/TrafficLight834.wrl 3603820.54 5793801.77 45.8