enum IfcBSplineSurfaceForm {
kIfcBSplineSurfaceForm_PLANE_SURF,
kIfcBSplineSurfaceForm_CYLINDRICAL_SURF,
kIfcBSplineSurfaceForm_CONICAL_SURF,
kIfcBSplineSurfaceForm_SPHERICAL_SURF,
kIfcBSplineSurfaceForm_TOROIDAL_SURF,
kIfcBSplineSurfaceForm_SURF_OF_REVOLUTION,
kIfcBSplineSurfaceForm_RULED_SURF,
kIfcBSplineSurfaceForm_GENERALISED_CONE,
kIfcBSplineSurfaceForm_QUADRIC_SURF,
kIfcBSplineSurfaceForm_SURF_OF_LINEAR_EXTRUSION,
kIfcBSplineSurfaceForm_UNSPECIFIED,
kIfcBSplineSurfaceForm_unset
};