-- Name -- Building -- Definition -- A Building is an enclosed construction above and/or underground, used or intended for the shelter of humans, animals or things or for the production of economic goods. A building refers to any structure permanently constructed or erected on its site.
-- Name -- Building part -- Definition -- A BuildingPart is a sub-division of a Building that might be considered itself as a building. -- Description -- NOTE 1: A BuildingPart is homogeneous related to its physical, functional or temporal aspects. NOTE 2: Building and BuildingPart share the same set of properties. EXAMPLE: A building may be composed of two building parts having different heights above ground.