TwoDimensionalSpatialRegion

2d-s-region

Definition: A spatial region [snap:SpatialRegion] with two dimensions.

Examples: the surface of a cube-shaped part of space, the surface of a sphere-shaped part of space, the surface of a rectilinear planar figure-shaped part of space

A two-dimensional spatial region is a spatial region that is of two dimensions. (axiom label in BFO2 Reference: [039-001])

an infinitely thin plane in space.

the surface of a sphere-shaped part of space

(forall (x) (if (TwoDimensionalSpatialRegion x) (SpatialRegion x))) // axiom label in BFO2 CLIF: [039-001]

http://purl.obolibrary.org/obo/bfo.owl