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            leaf gateway-ip {
              type inet:ip-address;
              description
                "Specifies the gateway IP address for this L3
                 protocol.";
                "GS NFV IFA011: Section 7.1.8.15,
                 L3ProtocolData information element.";
            leaf dhcp-enabled {
              type boolean;
              default "true";
              description
                "Indicates whether DHCP (Dynamic Host Configuration
                 Protocol) is enabled or disabled for this L3
                 protocol.";
                "GS NFV IFA011: Section 7.1.8.15,
                 L3ProtocolData information element.";
            leaf ipv6-address-mode {
              when "../ip-version = 'ipv6'";
              type enumeration {
                enum slaac;
                enum dhcpv6-stateful;
                enum dhcpv6-stateless;
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              }
              description
                "Specifies IPv6 address mode.
                 Values:
                   • SLAAC
                   • DHCPV6-STATEFUL
                   • DHCPV6-STATELESS
                 May be present when the value of the ipVersion
                 attribute is 'IPV6' and shall be absent otherwise.";
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              reference
                "GS NFV IFA011: Section 7.1.8.15,
                 L3ProtocolData information element.";
            }
            description
              "Specifies the L3 protocol data for this virtual link.
               Shall be present when the associatedLayerProtocol
               attribute indicates a L3 protocol and shall be absent
               otherwise.";
            reference
              "GS NFV IFA011: Section 7.1.8.13,
               VirtualLinkProtocolData information element.";
          }
          description
            "Specifies the protocol data for a VL instantiated
             according to this profile. Cardinality 0 is used when
             no protocol data needs to be specified.";
          reference
            "GS NFV IFA011: Section 7.1.8.4, VirtualLinkProfile
             information element.";
        }
      }

      list vip-cp-profile {
        key "id";
        description
          "Defines the minimum and maximum number of VIP CP instances
           created from each of the VipCpds used in this flavour.
           Shall be present if the deployment flavour can contain
           VIP CP instances.";
        reference
          "GS NFV IFA011: Section 7.1.8.2, VnfDf information
           element.";

        leaf id {
          type leafref {
            path "../../../vip-cpd/id";
          }
          description
            "Uniquely references a VIP CPD.";
          reference
            "GS NFV IFA011: Section 7.1.8.20, VipCpProfile information
             element.";
        }

        leaf min-number-of-instances {
          type uint16;
          description
            "Minimum number of instances of the VIP CP based on the
             referenced VIP CPD that is permitted to exist for this
             flavour. Shall be zero or greater.";
          reference
            "GS NFV IFA011: Section 7.1.8.20, VipCpProfile information
             element.";
        }

        leaf max-number-of-instances {
          type uint16;
          description
            "Maximum number of instances of the VIP CP based on the
             referenced VIP CPD that is permitted to exist for this
             flavour. Shall be greater than zero and not less than
             the value of 'minNumberOfInstances'.";
          reference
            "GS NFV IFA011: Section 7.1.8.20, VipCpProfile information
             element.";
        }
      }

      list instantiation-level {
        key "id";
        min-elements 1;
        description
          "Describes the various levels of resources that can be
           used to instantiate the VNF using this flavour.
           Examples: Small, Medium, Large. If there is only one
           'instantiationLevel' entry, it shall be treated as the
           default instantiation level for this DF.

           The InstantiationLevel information element describes a
           given level of resources to be instantiated within a
           deployment flavour in term of the number of VNFC instances
           to be created from each VDU.
           All the VDUs referenced in the level shall be part of the
           corresponding deployment flavour and their number shall
           be within the range (min/max) for this deployment flavour.";
        reference
          "GS NFV IFA011: Section 7.1.8.2 VnfDf information element";

        leaf id {
          type string;
          description
            "Uniquely identifies a level with the DF.";
          reference
            "GS NFV IFA011: Section 7.1.8.7 InstantiationLevel
             information element";
        }

        leaf description {
          type string;
          description
            "Human readable description of the instantiation level";
          reference
            "GS NFV IFA011: Section 7.1.8.7 InstantiationLevel
             information element";
        }

        list vdu-level {
          key "vdu-id";
          min-elements 1;
          description
            "Sets the number of instances for the VDU in this
             instantiation level.";
          reference
            "GS NFV IFA011: Section 7.1.8.7 InstantiationLevel
             information element";

          leaf vdu-id {
            type leafref {
              path "../../../../vdu/id";
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            }
            description
              "Uniquely identifies a VDU.";
            reference
              "GS NFV IFA011: Section 7.1.8.9 VduLevel information
               element";
          leaf number-of-instances {
            type uint16;
            must ". <= ../../../../df/" +
                 "vdu-profile[id=current()/../vdu-id]/" +
                 "max-number-of-instances";
            must ". >= ../../../../df/" +
                 "vdu-profile[id=current()/../vdu-id]/" +
                 "min-number-of-instances";
            default 1;
            description
              "Number of instances of VNFC based on this VDU to
               deploy for this level.";
              "GS NFV IFA011: Section 7.1.8.9 VduLevel information
               element";
          }
        }
        list vip-cp-level {
          key "id";
          description
            "Indicates the number of VIP CP instances based on
             a particular VipCpd to be part of this level.

             If a particular VipCpd is defined with
             minNumberOfInstances= maxNumberOfInstances=1 in the
             vipCpProfile of the DF, that vipCpd may be omitted
             from the 'vipCpLevel' attribute, which shall be
             interpreted that one related VIP CP instance is
             part of this level.";
          reference
            "GS NFV IFA011: Section 7.1.8.7, InstantiationLevel information
             element.";

          leaf id {
            type leafref {
              path "../../../../vip-cpd/id";
            }
            description
              "Uniquely references a VIP CPD.";
            reference
              "GS NFV IFA011: Section 7.1.10.6, VipCpLevel information
               element.";
          }

          leaf number-of-instances {
            type uint16;
            description
              "Number of VIP CP instances based on the referenced
               VipCpd to deploy for an instantiation level or for
               a scaling delta. Shall be zero or greater.";
            reference
              "GS NFV IFA011: Section 7.1.10.6, VipCpLevel information
               element.";
          }
        }

        list scaling-info {
          key "scaling-aspect-id";
          description
            "The InstantiationLevel information element describes a
             given level of resources to be instantiated within a
             DF in term of the number of VNFC instances to be
             created from each VDU.";
          reference
            "GS NFV IFA011: Section 7.1.8.7 InstantiationLevel
             information element";

          leaf scaling-aspect-id {
            type leafref {
              path "../../../scaling-aspect/id";
            description
              "Identifier of the scaling aspect.";
            reference
              "GS NFV IFA011: Section 7.1.8.8 ScaleInfo information
               element";
          }
          leaf scale-level {
            type uint32;
            description
              "The scale level, greater than or equal to 0.";
            reference
              "GS NFV IFA011: Section 7.1.8.8 ScaleInfo information
               element";
          }
        }
      }

      leaf default-instantiation-level {
        type leafref {
          path "../instantiation-level/id";
        }
        description
          "References the 'instantiationLevel' entry which defines
           the default instantiation level for this DF. It shall be
           present if there are multiple 'instantiationLevel'
           entries.";
        reference
          "GS NFV IFA011: Section 7.1.8.2 VnfDf information
           element";
      }

      leaf-list supported-operation {
        type identityref {
          base supported-operation;
        }
        description
          "Indicates which operations are available for this DF via
           the VNF LCM interface. Instantiate VNF, Query VNF and
           Terminate VNF are supported in all DF and therefore
           need not be included in this list.
           Values:
             • Scale VNF
             • Scale VNF to level
             • Heal VNF
             • Operate VNF
             • etc.";
        reference
          "GS NFV IFA011: Section 7.1.8.2 VnfDf information
           element";
      }

      container lcm-operations-configuration {
        description
          "This information element is a container for all
           attributes that affect the invocation of the VNF
           Lifecycle Management operations, structured by
           operation.";
        reference
          "GS NFV IFA011: Section 7.1.8.2 VnfDf information
           element";

        container instantiate-vnf-op-config {
          list parameter {
            key "key";

            leaf key {
              type string;
            leaf value {
              type string;
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            }
            description
              "Array of KVP requirements for VNF-specific parameters
               to be passed when invoking the InstantiateVnf
               operation.";
            reference
              "GS NFV IFA011: Section 7.1.5.3
               InstantiateVnfOpConfig information element";
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          }
          description
            "Configuration parameters for the InstantiateVnf
             operation.";
          reference
            "GS NFV IFA011: Section 7.1.5.2
             VnfLcmOperationsConfiguration information element";
        }
        container scale-vnf-op-config {
          description
            "Configuration parameters for the ScaleVnf operation.";
          reference
            "GS NFV IFA011: Section 7.1.5.2
             VnfLcmOperationsConfiguration information element";

          list parameter {
            key "key";

            leaf key {
              type string;
            }

            leaf value {
              type string;
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            }
            description
              "Array of KVP requirements for VNFspecific parameters
               to be passed when invoking the ScaleVnf operation.";
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            reference
              "GS NFV IFA011: Section 7.1.5.4 ScaleVnfOpConfig
               information element";
          leaf scaling-by-more-than-one-step-supported {
            type boolean;
            default false;
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            description
              "Signals whether passing a value larger than one in
               the numScalingSteps parameter of the ScaleVnf
               operation is supported by this VNF.
               Default is FALSE, i.e. 'not supported'.";
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            reference
              "GS NFV IFA011: Section 7.1.5.4
               ScaleVnfOpConfig information element";
        container scale-vnf-to-level-op-config {
          description
            "This information element defines attributes that
             affect the invocation of the ScaleVnfToLevel
             operation.";
            "GS NFV IFA011: Section 7.1.5.2
             VnfLcmOperationsConfiguration information element";
          list parameter {
            key "key";
            leaf key {
              type string;
            }
            leaf value {
              type string;
            }
            description
              "Array of KVP requirements for VNF-specific parameters
               to be passed when invoking the ScaleVnfToLevel
               operation.";
              "GS NFV IFA011: Section 7.1.5.5
               ScaleVnfToLevelOpConfig information element";
          leaf arbitrary-target-levels-supported {
            type boolean;
            default "false";
            description
              "Signals whether scaling according to the parameter
               'scaleInfo' is supported by this VNF.";
              "GS NFV IFA011: Section 7.1.5.5
               ScaleVnfToLevelOpConfig information element";
        container heal-vnf-op-config {
          description
            "This information element defines attributes that
             affect the invocation of the HealVnf operation.";
          reference
            "GS NFV IFA011: Section 7.1.5.2
             VnfLcmOperationsConfiguration information element";

          list parameter {
            key "key";

            leaf key {
              type string;
            }

            leaf value {
              type string;
            }
            description
              "Array of KVP requirements for VNF-specific parameters
               to be passed when invoking the HealVnf operation.";
              "GS NFV IFA011: Section 7.1.5.6 HealVnfOpConfig
               information element";
          leaf-list cause {
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            type string;
            description
              "Supported 'cause' parameter values.";
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            reference
              "GS NFV IFA011: Section 7.1.5.6 HealVnfOpConfig
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               information element";
          }
        container terminate-vnf-op-config {
          description
            "This information element defines attributes that
             affect the invocation of the TerminateVnf operation.";
          reference
            "GS NFV IFA011: Section 7.1.5.2
             VnfLcmOperationsConfiguration information element";

          leaf min-graceful-termination {
            type yang:timeticks;
            default "1";
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            description
              "Minimum timeout value for graceful termination of
               a VNF instance.";
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            reference
              "GS NFV IFA011: Section 7.1.5.7
               TerminateVnfOpConfig information element";
          leaf max-recommended-graceful-termination {
            type yang:timeticks;
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            description
              "Maximum recommended timeout value that can be needed
               to gracefully terminate a VNF instance of a
               particular type under certain conditions, such as
               maximum load condition. This is provided by VNF
               provider as information for the operator
               facilitating the selection of optimal timeout value.
               This value is not used as constraint.";
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            reference
              "GS NFV IFA011: Section 7.1.5.7
               TerminateVnfOpConfig information element";
          list parameter {
            key "key";
            leaf key {
              type string;
            }
            leaf value {
              type string;
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            }
            description
              "Array of KVP requirements for VNF-specific parameters
               to be passed when invoking the TerminateVnf
               operation.";
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            reference
              "GS NFV IFA011: Section 7.1.5.7
               TerminateVnfOpConfig information element";
        container operate-vnf-op-config {
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          description
            "This information element defines attributes that
             affect the invocation of the OperateVnf operation.";
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          reference
            "GS NFV IFA011: Section 7.1.5.2
             VnfLcmOperationsConfiguration information element";
          leaf min-graceful-stop-timeout {
            type yang:timeticks;
            default "1";
            description
              "Minimum timeout value for graceful stop of a VNF
               instance.";
            reference
              "GS NFV IFA011: Section 7.1.5.8
               OperateVnfOpConfig information element";
          }
          leaf max-recommended-graceful-stop-timeout {
            type yang:timeticks;
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            description
              "Maximum recommended timeout value that can be
               needed to gracefully stop a VNF instance of a
               particular type under certain conditions, such as
               maximum load condition. This is provided by VNF
               provider as information for the operator facilitating
               the selection of optimal timeout value. This value
               is not used as constraint.";
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            reference
              "GS NFV IFA011: Section 7.1.5.8
               OperateVnfOpConfig information element";
          list parameter {
            key "key";
            leaf key {
              type string;
            }
            leaf value {
              type string;
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            }
            description
              "Array of KVP requirements for VNF-specific parameters
               to be passed when invoking the OperateVnf
               operation.";
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            reference
              "GS NFV IFA011: Section 7.1.5.8
               OperateVnfOpConfig information element";
        container change-vnf-flavour-op-config {
          list parameter {
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            key "key";
            leaf key {
              type string;
            }
            leaf value {
              type string;
            }
            description
              "Array of KVP requirements for VNF-specific parameters
               to be passed when invoking the OperateVnf
               operation.";
            reference
              "GS NFV IFA011: Section 7.1.5.9
               ChangeVnfFlavour information element";
          }
          description
            "Configuration parameters for the ChangeVnfFlavour
             operation.";
          reference
            "GS NFV IFA011: Section 7.1.5.2
             VnfLcmOperationsConfiguration information element";
        }
        container change-ext-vnf-connectivity-op-config {
          list parameter {
            key "key";
            leaf key {
              type string;
            }
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            leaf value {
              type string;
            }
            description
              "Array of KVP requirements for VNF-specific parameters
               to be passed when invoking the
               ChangeExtVnfConnectivity operation.";
            reference
              "GS NFV IFA011: Section 7.1.5.10
               ChangeExtVnfConnectivityOpConfig information
               element";
          description
            "Configuration parameters for the
             ChangeExtVnfConnectivity operation.";
          reference
            "GS NFV IFA011: Section 7.1.5.2
             VnfLcmOperationsConfiguration information element";
        }
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        container create-snapshot-vnf-op-config {
          description
            "Configuration parameters for the Create VNF Snapshot
             operation.";
          reference
            "GS NFV IFA011: Section 7.1.5.2
             VnfLcmOperationsConfiguration information element";

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            min-elements 1;
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            leaf value {
              type string;
            }
            description
              "Array of KVP requirements for VNF-specific parameters
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               to be passed when invoking the
               CreateSnapshotVnfOpConfig operation.";
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              "GS NFV IFA011: Section 7.1.5.11
               CreateSnapshotVnfOpConfig information
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        container revert-to-snapshot-vnf-op-config {
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            "Configuration parameters for the Revert-To VNF Snapshot
             operation.";
          reference
            "GS NFV IFA011: Section 7.1.5.2
             VnfLcmOperationsConfiguration information element";
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          list parameter {
            key "key";
            min-elements 1;
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            leaf key {
              type string;
            }
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            leaf value {
              type string;
            }
            description
              "Array of KVP requirements for VNF-specific parameters
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               to be passed when invoking the
               RevertToSnapshotVnfOpConfig operation.";
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            reference
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              "GS NFV IFA011: Section 7.1.5.12
               RevertToSnapshotVnfOpConfig information
               element";
        list change-current-vnf-package-op-config {
          key "id";
          description
            "Configuration parameters for the
             ChangeCurrentVnfPackageOpConfig operation.";
          reference
            "GS NFV IFA011: Section 7.1.5.2
             VnfLcmOperationsConfiguration information element";

          leaf id {
            type string;
            description
              "Identifier of this parameter set for later referencing.";
            reference
              "GS NFV IFA011: Section 7.1.5.13
               ChangeCurrentVnfPackageOpConfig information
               element";
          }

          list parameter {
            key "key";

            leaf key {
              type string;
            }

            leaf value {
              type string;
            }
            description
              "Array of KVP  requirements for VNF-specific parameters
               to be passed when invoking the change current VNF
               Package operation.";
            reference
              "GS NFV IFA011: Section 7.1.5.13
               ChangeCurrentVnfPackageOpConfig information
               element";
          }
      }

      list affinity-or-anti-affinity-group {
        key "id";
        description
          "The AffinityOrAntiAffinityGroup describes the affinity
           or anti-affinity relationship applicable between the
           virtualization containers to be created based on
           different VDUs, or between internal VLs to be created
           based on different VnfVirtualLinkDesc(s).

           Per VNF, the affinity/anti-affinity rules defined using
           this information element, using the
           LocalAffinityOrAntiAffinityRule information element, and
           using the placement constraints in the
           GrantLifecycleOperation as defined in ETSI GS NFV-IFA
           007 [i.3] should be conflict-free. In case of conflicts,
           the placement constraints in the
           GrantLifecycleOperation shall take precedence.";

        reference
          "GS NFV IFA011: Section 7.1.8.2 VnfDf information
           element";
        leaf id {
          type string;
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          description
            "Identifier of this AffinityOrAntiAffinityGroup
             information element.";
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          reference
            "GS NFV IFA011: Section 7.1.8.12
             AffinityOrAntiAffinityGroup information element";
          mandatory true;
          type affinity-type;
          description
            "Specifies the type of relationship that the members of
             the group have.
             Values:
                • AFFINITY
                • ANTI-AFFINITY";
          reference
            "GS NFV IFA011: Section 7.1.8.12
             AffinityOrAntiAffinityGroup information element";
        }
        leaf scope {
          mandatory true;
          type affinity-scope;
          description
            "Specifies the scope of the affinity or anti-affinity
             relationship.
             Values:
                • NFVI-PoP
                • Zone
                • ZoneGroup
                • NFVI-node
                • network-link-and-node";
            "GS NFV IFA011: Section 7.1.8.12
             AffinityOrAntiAffinityGroup information element";
        }
      }
      list indicator {
        key "id";

        leaf id {
          type string;
          description
            "Unique identifier.";
          reference
            "GS NFV IFA011: Section 7.1.11.2 VnfIndicator
             information element";
        leaf name {
          type string;
          description
            "The human readable name of the VnfIndicator.";
          reference
            "GS NFV IFA011: Section 7.1.11.2 VnfIndicator
             information element";
        }

        leaf indicator-value {
          type string;
          description
            "Defines the allowed values or value ranges of this
             indicator.";
          reference
            "GS NFV IFA011: Section 7.1.11.2 VnfIndicator
             information element";
        }
        leaf source {
          type enumeration {
            enum vnf;
            enum em;
            enum both;
          }
          description
            "Describe the source of the indicator.
             Values:
              • VNF
              • EM
              • Both

             This tells the consumer where to send the subscription
             request.";
            "GS NFV IFA011: Section 7.1.11.2 VnfIndicator
             information element";
        }

        description
          "Declares the VNF indicators that are supported by this
           VNF (specific to this DF).";
        reference
          "GS NFV IFA011: Section 7.1.8.2 VnfDf information
      list supported-vnf-interfaces {
        key "name";

        leaf name {
          type enumeration {
            enum vnf-configuration;
            enum vnf-indicator;
            "Identifies an interface produced by the VNF.
             Values:
               • VNF_CONFIGURATION
               • VNF_INDICATOR
               • VNF_LCM_COORDINATION";
          reference
            "GS NFV IFA011: Section 7.1.8.16 VnfInterfaceDetails
             information element";
        }

        leaf-list cpd-id {
          type leafref {
            path "../../../ext-cpd/id";
          description
            "References one or more CPDs from which to instantiate
             external CPs through which interface endpoints on the
             VNF side can be reached by the VNFM.";
          reference
            "GS NFV IFA011: Section 7.1.8.16 VnfInterfaceDetails
             information element";
        }

        list interface-details {
          key "key";

          leaf key {
            type string;
          }
        }

        description
          "Indicates which interfaces the VNF produces and provides
           additional details on how to access the interface
           endpoints.";
        reference
          "GS NFV IFA011: Section 7.1.8.2 VnfDf information
             element";
      }

      list supported-coordination-actions {
        key "vnf-lcm-operation";

        description
          "References applicable LCM coordination actions
           that can be invoked during each of the listed
           VNF LCM operations.";
        reference
          "GS NFV IFA011: Section 7.1.8.2 VnfDf information
           element";

        leaf vnf-lcm-operation {
          type enumeration {
            enum "instantiate";
            enum "scale";
            enum "scale_to_level";
            enum "change_flavour";
            enum "terminate";
            enum "heal";
            enum "operate";
            enum "change_ext_conn";
            enum "modify_info";
            enum "create_snapshot";
            enum "revert_to_snapshot";
          }
          description
            "Identifies the specific VNF LCM operation.
             Values:
             • INSTANTIATE
             • SCALE
             • SCALE_TO_LEVEL
             • CHANGE_FLAVOUR
             • TERMINATE
             • HEAL
             • OPERATE
             • CHANGE_EXT_CONN
             • MODIFY_INFO
             • CREATE_SNAPSHOT
             • REVERT_TO_SNAPSHOT.";
          reference
            "GS NFV IFA011: Section 7.1.16.3 LcmCoordinationActionMapping
             information element";
        }
        leaf coordination-action-name {
          type leafref {
            path "../../../lcm-operations-coordination/coordination-action-name";
          }
          description
            "References to the names of coordination actions that can be
             invoked during the LCM operation indicated by the
             'vnfLcmOperation' attribute.

             The related coordination actions shall either be declared
             in the VnfLcmOperationCoordination information element
             in the same VNFD, or shall be well-known standardized
             coordination action name identifiers.";
          reference
            "GS NFV IFA011: Section 7.1.16.3 LcmCoordinationActionMapping
             information element";
        }
      }

      list monitoring-parameter {
        key "id";

        description
          "Defines the virtualised resources monitoring parameters
           on VNF level.";
        reference
          "GS NFV IFA011: Section 7.1.8.2 VnfDf information
           element";

        leaf id {
          type string;
          description
            "Unique identifier of the monitoring parameter.";
          reference
            "GS NFV IFA011: Section 7.1.11.3 MonitoringParameter
             information element";
        }
        uses monitoring-parameter;
      }

      list scaling-aspect {
        key "id";

        description
          "The scaling aspects supported by this DF of the VNF.
           scalingAspect shall be present if the VNF supports
           scaling.";
        reference
          "GS NFV IFA011: Section 7.1.8.2 VnfDf information
           element";

        leaf id {
          type string;
          description
            "Unique identifier of this aspect in the VNFD.";
          reference
            "GS NFV IFA011: Section 7.1.10.2 ScalingAspect
               information element";
        }

        leaf name {
          type string;
          description
            "Human readable name of the aspect.";
          reference
            "GS NFV IFA011: Section 7.1.10.2 ScalingAspect
             information element";
        }

        leaf description {
          type string;
          description
            "Human readable description of the aspect.";
          reference
            "GS NFV IFA011: Section 7.1.10.2 ScalingAspect
             information element";
        }

        leaf max-scale-level {
          type uint32 {
            range "1..max";
          description
            "The maximum scaleLevel for total number of scaling