No support of b-splines within current IFC implementations [added 2008-02-26 & 2010-03-01]

Based on          IFC2x3

Initiator            ISG Meeting-Berlin

Effects              Extended Coordination View

Date                    2006 02 24


The b-splines as definined in IFC:



are not supported by implementations in any case (not in profiles, nor in 2D Geometry).

[added 2008-02-26] It is an error to export a b-spline (being IfcBezierCurve or IfcRationalBezierCurve) as part of an IFC2x3 coordination view exchange file.

[added 2010-03-01] Reconfirmed for Coordination View Version 2.0, b-splines are excluded from scope

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