module huawei-ietf-netconf-ext {

    yang-version 1;

    namespace
      "urn:huawei:yang:huawei-ietf-netconf-ext";

    prefix nc-ext;

    import ietf-netconf {
      prefix nc;
    }
    import huawei-extension {
      prefix ext;
    }

    organization
      "Huawei Technologies Co., Ltd.";

    contact
      "Huawei Industrial Base
     Bantian, Longgang
     Shenzhen 518129
     People's Republic of China
     Website: http://www.huawei.com
     Email: support@huawei.com";

    description
      "Extension of NETCONF protocol standard operations that were used privately for Huawei device.";

    revision "2019-05-25" {
      description "Initial revision.";
      reference
        "Huawei private.";

    }

    ext:task-name "netconf";

    typedef flow-id-type {
      type uint32;
      description
        "This type used for the attribute 'flow-id';
         The rpc-reply of the sync-full/edit-config operation will contain the 'flow-id' XML attribute.";
    }

    notification netconf-rpc-keepalive {
      description
        "This notification will be generated every 20 seconds if the operation takes more time,
       Client must use filter to subscribe this notification for a specific session,
       and it can report error if this notification is not enabled without the filter.";
      leaf session-id {
        type uint32;
        description
          "Session in which client want to receive this notitification; 
         Unique identifier for the session. This value is the NETCONF session identifier, as defined in [RFC4741].Refer to RFC 6022 section 2.1.4.";
      }

      leaf message-id {
        type string {
          length "0..4095";
        }
        description
          "Message id of the rpc operation that is taking long time to execute.";
      }
    }  // notification netconf-rpc-keepalive
  }  // module huawei-ietf-netconf-ext