optimShd."ProdGCPV ", directly.
Class "Gef ", by class "ProdGCPV", distance 2.
Class "G0 ", by class "ProdGCPV", distance 3.
Class "Meteo ", by class "ProdGCPV", distance 4.
Class "Sol ", by class "ProdGCPV", distance 4.Gef ,
ProdGCPV .