## Full example

    ApacheServer {
        # Apache instances will be deployed by Roboconf's Puppet extension
        installer: puppet;

        # Web applications could be deployed over this Apache server
        children: My-Dash-Board, Marketing-Suite;

        # Properties exported by this component.
        # 'port' should have a default value, or we will have to set it when we create an instance.
        exports: port = 19099;

        # 'ip' is a special variable. It will be updated at runtime by a Roboconf agent.
        exports: ip;

        # Other components properties that this server needs to have so that it can start.
        imports: LB.port (optional), LB.ip (optional);

        # Here, the Apache may also be notified about components instances of type LB.
        # The imports are marked as optional. It means that if there is no LB instance, an
        # Apache instance will be able to start anyway.
        #
        # If the import was not optional, e.g.
        #
        # imports: LB.port, LB.ip;
        # or even
        # imports: LB.port (optional), LB.ip;
        #
        # ... then an Apache instance would need at least one LB instance somewhere.

        # Imports may also reference variables from other applications
        imports: external Lamp.lb-ip;
    }

    facet LoadBalanced {
        exports: ip, port;  # Define we export two variables.
    }

    instance of VM {

        # This will create 5 VM instances, called VM 1, VM 2, VM3, VM 4 and VM 5.
        name: VM ;  # Yes, there is a space at the end... :)
        count: 5;

        # On every VM instance, we will deploy...
        instance of Tomcat {
            name: Tomcat;
        }
    }