network model =
    assets:
        router;
        website;
        database;
        nas;
        workstation;

    facts:
        topology:router<->website,dmz;
        topology:router<->workstation,private_nat;

        quality:website,service_type=web_server;
        quality:website,sql_injection=true;
        topology:website<->database,private_segment;
        topology:website<->nas,private_segment;

        quality:workstation,user_phished=true;
        quality:workstation,malware_downloaded=false;
        quality:workstation,user_admin_privs=true;
        topology:workstation<->nas,private_segment;

        quality:nas,service_type=storage;

        quality:database,service_type=database;
.