Mermaid Use Case Diagram with MAIDR

Actors and use cases are read inside their system boundary, along the associations between them.

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usecase-beta
direction LR
actor Customer
actor Clerk("Payment clerk")
systemBoundary "Shop"
  Browse("Browse catalogue")
  Checkout("Place order")
  Refund("Issue refund")
end
Customer --> Browse
Customer --> Checkout
Clerk --> Refund