Update _3gpp-ns-nrm-networkslicesubnet.yang

    uses subnet3gpp:SubNetworkGrp;

    uses EPTransportGrp;

    leaf operationalState {

      description "The operational state of the network slice instance. 

        It describes whether or not the resource is physically installed 

        and working.";

      mandatory true;

      config false;

      type types3gpp:OperationalState;

    }

    leaf administrativeState {

      description "The administrative state of the network slice instance.

        It describes the permission to use or prohibition against

        using the instance, imposed through the OAM services.";

      mandatory true;

      type types3gpp:AdministrativeState;

    }

    list nsInfo {

      description "This list represents the properties of network service 

        information corresponding to the network slice subnet instance.";