# 8.8.3.9 IfcCartesianPointList2D

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## 8.8.3.9.1 Semantic definition

The IfcCartesianPointList2D defines an ordered collection of two-dimentional Cartesian points. Each Cartesian point is provided as an two-dimensional point by a fixed list of two coordinates. The attribute CoordList is a two-dimensional list, where

• first dimension is an unbounded list representing each 2D Cartesian point;
• second dimension is a fixed list of two list members, where [1] is the x-coordinate, and [2] the y-coordinate of the Cartesian point.

## 8.8.3.9.4 Formal representation

ENTITY IfcCartesianPointList2D
SUBTYPE OF (IfcCartesianPointList);
CoordList : LIST [1:?] OF LIST [2:2] OF IfcLengthMeasure;
TagList : OPTIONAL LIST [1:?] OF IfcLabel;
END_ENTITY;