// Frozen authored schema3 compatibility input. Do not rewrite as current syntax.
arcadia 3;
project legacy_data "Legacy data contract" id "00000000-0000-0000-0000-000000000001" {
    sa_function produce "Produce" id "00000000-0000-0000-0000-000000000002" {}
    sa_function consume "Consume" id "00000000-0000-0000-0000-000000000003" {}
    sa_exchange_item packet "Position event" id "00000000-0000-0000-0000-000000000004" {
        kind Event;
        // Reused record parameters retain their own identities.
        sa_data_field origin "Origin" id "00000000-0000-0000-0000-000000000007" { type_ref { Named @coordinate; }; }
        sa_data_field destination "Destination" id "00000000-0000-0000-0000-000000000008" { type_ref { Named @coordinate; }; }
    }
    sa_data_type coordinate "Coordinate" id "00000000-0000-0000-0000-000000000005" {
        definition Record;
        sa_data_field latitude "Latitude" id "00000000-0000-0000-0000-000000000006" { type_ref Real; unit "deg"; }
    }
    sa_interface sender_contract "Sender contract" id "00000000-0000-0000-0000-000000000009" { items [@packet]; }
    sa_interface receiver_contract "Receiver contract" id "00000000-0000-0000-0000-00000000000a" { items [@packet]; }
    sa_port output "Output" id "00000000-0000-0000-0000-00000000000b" {
        parent @produce; contract { FunctionOutput { outgoing_items [@packet]; }; }; legacy none;
    }
    sa_port input "Input" id "00000000-0000-0000-0000-00000000000c" {
        parent @consume; contract { FunctionInput { incoming_items [@packet]; }; }; legacy none;
    }
    functional_exchange position_exchange "Position exchange" id "00000000-0000-0000-0000-00000000000d" {
        source @produce; target @consume; source_port @output; target_port @input; items [@packet];
    }
    sa_scenario scenario "Position scenario" id "00000000-0000-0000-0000-00000000000e" {
        viewpoint Functional; steps [@message];
        sa_lifeline sender "Sender" id "00000000-0000-0000-0000-00000000000f" { represented @produce; }
        sa_lifeline receiver "Receiver" id "00000000-0000-0000-0000-000000000010" { represented @consume; }
        sa_occurrence message "Position" id "00000000-0000-0000-0000-000000000011" {
            body { Exchange {
                exchange @position_exchange; sender @sender; receiver @receiver;
                values [{ field @latitude; expression "navigation.latitude"; }];
            }; };
        }
    }
}