enum IfcBSplineCurveForm {
kIfcBSplineCurveForm_POLYLINE_FORM,
kIfcBSplineCurveForm_CIRCULAR_ARC,
kIfcBSplineCurveForm_ELLIPTIC_ARC,
kIfcBSplineCurveForm_PARABOLIC_ARC,
kIfcBSplineCurveForm_HYPERBOLIC_ARC,
kIfcBSplineCurveForm_UNSPECIFIED,
kIfcBSplineCurveForm_unset
};