Extensions for stereoscopic 3D images?

Has anyone considered a schema for stereoscopic 3D images?  Having a pair of images tagged with left and right could be a big help
to a viewer.  Could this fit within the MediaObject?  More generally, it would be useful to be able to tag a sequence of images as a
left/right scan fit for 3D stereoscopic viewing.  These can be presented as a wiggle, or two images selected as a single left/right
pair.

There are also stereoscopic formats that fit within a single images.  For example: left/right pair, right/left pair, over/under
pair, checker-board, interlaced, anaglyph, etc.  Perhaps such information could be a simple extension of the MediaObject?

When there is a single image with sub-images of a stereoscopic left-right scan then perhaps the bounding boxes of the sub-images
could be store, and this would handle left/right, right/left, over/under, etc.  This would also allow the information for centring
the sub-images to be stored.

Regards
Douglas Crosher