Graphviz Example: workflow

digraph BookingWorkflow {

start[shape=circle]

end[shape=doublecircle]

lock_booking[shape=rectangle]

process_payment[shape=rectangle]

successful_payment[shape=diamond label="success?"]

reserve_booking[shape=rectangle]

release_booking[shape=rectangle]

start -> lock_booking

lock_booking -> process_payment

process_payment -> successful_payment

successful_payment -> release_booking[label=NO]

successful_payment -> reserve_booking[label=Yes]

reserve_booking -> send_email

send_email -> end

release_booking -> end

}