user { # User
  n1: circle label:"Start Transform"
  n3: rectangle label:"Validate Transform conditions"
  n5: diamond label:"Record Transform outcome"
  n7: circle label:"End Transform"
  n1.handle(bottom) -> app.n2.handle(top)
  n3.handle(bottom) -> app.n4.handle(top) [label="Processed"]
  n5.handle(bottom) -> app.n6.handle(top)
  n5.handle(right) -> app.n4.handle(right) [label="Retry/Rejected"]
}

app { # App
  n2: rectangle label:"Receive Transform event"
  n4: rectangle label:"Execute Transform action"
  n6: rectangle label:"Monitor Transform status"
  n6.handle(right) -> user.n7.handle(bottom) [label="Success"]
  n4.handle(bottom) -> user.n5.handle(left)
  n2.handle(right) -> user.n3.handle(left)
}