Update README.md

README.md

@@ -6,7 +6,7 @@ For the mentioned CityGML building model to be an approximate of the Rosensteinq
 
 The Rosensteinquartier CityGML LoD1 building model contains the following attributes for each building and their related building parts:
 
-1. Building Functions as per [SIG3D codelist](http://www.sig3d.org/codelists/citygml/2.0/building/2.0/_AbstractBuilding_class.xml)
+1. Building Functions as per [SIG3D codelist](http://www.sig3d.org/codelists/citygml/2.0/building/2.0/_AbstractBuilding_function.xml)
 2. Gross Floor Area (m²)
 3. Building Footprint Area (m²)
 4. Building Height (m)