Miscellaneous Slot Values.

These are symbols that can give a value to element attributes or a transformation argument. They can be broken down into the following types: locations, sizes, thicknesses, numbers, speeds, directions, and lengths.

The locations are absolute locations in an s-image to anchor where things are. I expect there will be two levels of abstraction: a high qualitative level with symbols like top, bottom, center, etc. and a lower finer-grained level that can be zoomed into when necessary. The lower level of locations will be based on an estimate of the resolution of the visual cortex, based on results from perception and brain studies.

Table 4: Classifications of Miscellaneous slot values
locations	bottom	top	right	center	off-bottom	off-top	off-right	off-left
sizes	small	medium	large
thicknesses	thin	thick	very-thick
speeds	slow	medium	fast
directions	left	right	up	down
lengths	short	medium	long