[NTG-context] [ export to svg ]

Is there a (simple) way to export the results of a \startMPpage ... \stopMPpage directly to a svg file? My current route is to import the pdf into inkscape, group path objects by stroke color, then save the result as svg and translate that into a hpgl format for the pen plotter. I guess/hope there is some hidden switch dumping the MPpage directly into a hpgl file ;-) .Floris