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+UseCaseDiagram [frame=true framecolor=steelblue label="OnlineBet"] {
+  actor a as "Parieur"
+  usecase u as "Placer un pari"
+  a -- u
+  usecase y as "S'inscrire"
+  a -- y
+  actor b as "Sources"
+  usecase v as "Mettre à jour les infos"
+  b -- v 
+  actor c as "Bookmaker"
+  usecase w as "Définit les évènements"
+  c -- w 
+  usecase x as "Paramétrer le profil d'un parieur"
+  c -- x
+  
+  
+}