This is a derivative of function resolveRelative.
function resolveRelative_der import Modelica.Mechanics.MultiBody.Frames; extends Modelica.Icons.Function; input Real v1[3] "Vector in frame 1"; input Orientation R1 "Orientation object to rotate frame 0 into frame 1"; input Orientation R2 "Orientation object to rotate frame 0 into frame 2"; input Real v1_der[3] "= der(v1)"; output Real v2_der[3] "Derivative of vector v resolved in frame 2"; end resolveRelative_der;