// System Analysis identifies one system of interest and its external participant.
sa_system rescue_system "Rescue coordination system" id "00000000-0000-4000-8000-000000000301" {
    description "The selected system receives reports and supports the coordinator.";
    // A component port belongs to its participant, not to an allocated function.
    sa_port reporting_input "Reporting input" id "00000000-0000-4000-8000-000000000303" {
        contract { Component { kind Flow; orientation In; }; };
    }
}
sa_actor vessel_service "Vessel communication service" id "00000000-0000-4000-8000-000000000302" {
    description "An external service sends distress information across the system boundary.";
    sa_port reporting_output "Reporting output" id "00000000-0000-4000-8000-000000000304" {
        contract { Component { kind Flow; orientation Out; }; };
    }
}

// The boundary exchange connects actual participant ports. Function realization
// is declared separately in reporting.arcadia using port/exchange allocations.
boundary_exchange radio_reporting "Radio reporting" id "00000000-0000-4000-8000-000000000501" {
    source @reporting_output; target @reporting_input;
    oriented true;
    items [@sa_report_data];
}