4.1.3 Project Representation Context

A project representation context indicates the coordinate system orientation, direction of true north, precision, and other values that apply to all geometry within a project or project library. A main geometric representation context is created for 3D model, and 2D representations, both can be further refined using geometric representation sub contexts.

Figure 4 illustrates an instance diagram.

Project Representation ContextIfcContextIfcLabelIfcLabelIfcLabelIfcGeometricRepresentationContextIfcLabelIfcLabelIfcDimensionCountIfcAxis2Placement3DIfcCartesianPointIfcDirectionIfcDirectionIfcDirectionIfcGeometricRepresentationSubContextIfcPositiveRatioMeasureIfcGeometricProjectionEnumIfcLabel

Figure 4 — Project Representation Context

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