-DEFINE_STANDARD_HANDLE(HYDROData_Stream, HYDROData_NaturalObject)
-
-class Handle(HYDROData_PolylineXY);
-class Handle(HYDROData_Polyline3D);
-class Handle(HYDROData_Profile);
+class HYDROData_DTM;
+class HYDROData_PolylineXY;
+class HYDROData_Polyline3D;
+class HYDROData_Profile;