Framing is one composition technique meant to draw attention and focus to the image subject. The subject may be framed through using: Light/Shadow, Architecture, Windows/Doors, Nature, Shapes/Lines and I would also think Negative Space would qualify. This challenge is not about adding a frame to an image.
(Note: we are anticipating high winds with heavy rain - which have begun - so I may get knocked off internet.)
I have a feeling that this will be another great challenge. Pat, also liked your opening post and your explanation. I should have some photos that qualify.
These were taken in 2006.