@startuml
object "Liaison : l1" as l1
object "Station : Melun" as melun
object "Liaison : l2" as l2
object "Liaison : l3" as l3
object "Station : Maison Alfort" as ma
object "Station : Vert de Maison" as vdm
object "Ligne : R" as ligner
object "Ligne : Rer D" as rerd
object "PAC :  : MVM" as PACMVM
object "PS : Ligne Rer D" as pslignererD
object "PS : Ligne R" as pslignedr
object "PS : Ligne D" as psligned

melun <-- l1
garedelyon <-- l1

@enduml