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##
nurl

       'nurl' <name(char9)|!> ['DEFINE' <pstart> <pend>  ->
       <deg> <npnt> <nknt> <div>]|
                              ['CONTROL' <index> <pnt> <weight>]|
                              ['KNOT' <index> <value>]|
                              ['END']

This keyword is used to define a nurbs line. So far this command is only used to read a nurbs-line definition. This line will be converted automatically into a spline. Nurbs-lines can be displayed but will not be saved. CAD-interfaces might use this functionality.