EXTERNPROTO NurbsPositionInterpolator [
    eventIn      SFFloat  set_fraction
    eventIn      MFFloat  set_knot
    eventIn      MFFloat  set_order
    eventIn      MFFloat  set_keyValue
    exposedField SFBool   fractionAbsolute 
    exposedField MFFloat  keyWeight        
    field MFFloat  knot                                             
    field SFInt32  order                                          
    field MFVec3f  keyValue                                 
    eventOut     SFVec3f  value_changed 
  ]
  [
          "urn:inet:blaxxun.com:node:NurbsPositionInterpolator",
          "nurbs.wrl#NurbsPositionInterpolator"  # for local testing
          "<a href=http://www.blaxxun.co>/vrml/protos/nurbs.wrl#NurbsPositionInterpolator"
  ]