# 8.13.3.3 IfcPlanarExtent

## 8.13.3.3.1 Semantic definition

The planar extent defines the extent along the two axes of the two-dimensional coordinate system, independently of its position. If the planar extent is used within a three-dimensional coordinate system, it defines the extent along the x and y axes.

## 8.13.3.3.4 Formal representation

ENTITY IfcPlanarExtent
SUPERTYPE OF (ONEOF
(IfcPlanarBox))
SUBTYPE OF (IfcGeometricRepresentationItem);
SizeInX : IfcLengthMeasure;
SizeInY : IfcLengthMeasure;
END_ENTITY;