# 8.9.3.47 IfcPlane

## 8.9.3.47.1 Semantic definition

The planar surface is an unbounded surface in the direction of x and y. Bounded planar surfaces are defined by using a subtype of IfcBoundedSurface with BasisSurface being a plane.

   C = Position.Location
x = Position.P[1]
y = Position.P[2]
z = Position.P[3] => normal to plane

and the surface is parameterized as:

The inherited attributes are interpreted as

## 8.9.3.47.4 Formal representation

ENTITY IfcPlane
SUBTYPE OF (IfcElementarySurface);
END_ENTITY;