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sequenceDiagram
autonumber

participant Client
participant Metadata Server
participant Data Server
Client->>Metadata Server: GetFlightInfo(FlightDescriptor)
Metadata Server->>Client: FlightInfo{endpoints: [FlightEndpoint{ticket: Ticket}, …]}
Note over Client, Data Server: This may be parallelized
loop for each endpoint in FlightInfo.endpoints
    Client->>Data Server: DoGet(Ticket)
    Data Server->>Client: stream of FlightData
end
