spatial region zero-dimensional spatial region A zero-dimensional spatial region is a point in space. (axiom label in BFO2 Reference: [037-001]) 0d-s-region ZeroDimensionalSpatialRegion (forall (x) (if (ZeroDimensionalSpatialRegion x) (SpatialRegion x))) // axiom label in BFO2 CLIF: [037-001] three-dimensional spatial region