Before revision:  In this document , we focus on conversion of splines rather than going through the propertiesof them, i. e, converting the control points of a spline to the control points of another spline, which results in approximately the same curve, as the spline before conversion represents .
After revision:  In this document , we focus on conversion of splines rather than going through their properties. By deriving the conversion equations, we aim at converting the original set of the control points of a spline to the control points of another spline, which results in approximately the same curve, as the spline before conversion represents .