S-partition is the partition obtained by extending all the partitions in space.
S-partition (s-spaces)
Sources
Peponis, J., Wineman, J., Rashid, M., Hong Kim, S., Barna, S., (1997) On the description of shape and spatial configuration inside buildings: convex partitions and their local properties, Environment and Planning B, Vol 24, 761-781. pp.767-768.