Normal	Intersection	Tolerant	Edge_SP
3D curve	exact	approx (1)	approx	approx
SP curve	approx	approx	exact (2)	exact and approx (3)

 
(1) Intersection edge curves are available only through approximation using b-spline curves.
 
(2) The SP curve available for output is an exact representation of the SP curve on the tolerant edge in the body. However, the SP curve's accuracy with respect to the edge it represents was determined when the curve was made during modelling, and cannot be improved by specifying a smaller tolerance when obtaining the geometry.
 
(3) One SP curve represents the edge exactly, but the other SP curve (from the other face on the edge) is approximated when output. A 3D curve is approximated when output.