OptionalcutoutSolid the size of the whole window, used to cut the opening out of the wall panels. It is not meant to be drawn.
OptionalglassThe glass pane.
OptionalglassThe frame that holds the glass, inside the outer frame.
OptionalframeThe outer frame, as deep as the wall, that the glass frame sits in.
OptionalcompoundThe frame, the glass frame and the glass together. Not set for a corner window.
The shapes of a window in a building model: the cutout for the wall, the outer frame, the frame around the glass, the glass, and those three together.