A door panel is normally a door leaf that opens to allow people or goods to pass. The parameters of the door panel define the geometrically relevant parameter of the panel. The IfcDoorPanelProperties are used to parametrically describe the shape and operation of door panels. The parametric definition can be added solely or additionally to the explicit shape representation of the door. 

The parameters of the IfcDoorPanelProperties do not hold a geometric representation. Instead they define a standard door panel, including (if given) a proportional width to define non-uniform double swing (or sliding, or folding) doors. The outer boundary of the panel is determined by the 'Profile' shape representation assigned to the IfcDoor, which inserts the IfcDoorType. It has to take the lining parameter into account as well.

• The depth of the panel (swinging, double-acting, and sliding panels) is defined by the PanelDepth parameter.
  • PanelDepth

• For door operation types that include more than one panel, the width of (at least) one panel is given by a normalized ratio measure. It determines the width of that panel, which is defined as a ratio of the overall width of the door opening.
  • PanelWidth