参与者是一个名字,用例是括号里的名字。箭头表示该参与者参与其中。
usecase-beta
actor Customer
actor Support
Customer --> Checkout
Support --> TracksystemBoundary 和 end 之间的都属于系统。边界外的用例不属于。
usecase-beta
actor Customer
systemBoundary Storefront
Browse("Browse catalogue")
Checkout("Checkout")
end
Customer --> Browse
Customer --> Checkout一根虚线箭头,冒号后跟一个词,表示一个用例用到了另一个。
usecase-beta
actor Customer
systemBoundary Storefront
Browse("Browse catalogue")
Checkout("Checkout")
end
Customer --> Browse
Customer --> Checkout
Checkout ..> : include Browse和流程图同一个关键字:TD、TB、BT、LR 和 RL。
usecase-beta
direction LR
actor Customer
systemBoundary Storefront
Checkout("Checkout")
end
Customer --> Checkout