ISO 10303-214:2010(E)
A B_spline_curve is a general polynomial or a rational parametric sculptured curve of various degrees and segments, defined in terms of control points, associated basic functions, weights, and knots.
NOTE A polynomial uniform B_spline_curve is defined by a list of control points and by the associated basis functions. The knot values can be derived and the weights are equal. A rational non-uniform B_spline_curve is defined by a list of control points, by the associated basis functions, by weights and by multiplicities of knots.
EXAMPLE A circular arc can be represented by a rational parametric curve.
A B_spline_curve is a type of Curve.
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