SOL003-VNFLifecycleManagement-API.yaml

                        JSON, a set of key- value pairs is represented as an
                        object. It shall comply with the provisions  defined in
                        clause 4 of IETF RFC 7159. 
                      type: object
                    extra:
                      description: >
                        This type represents a list of key-value pairs. The
                        order of the pairs in the list is not significant. In
                        JSON, a set of key- value pairs is represented as an
                        object. It shall comply with the provisions  defined in
                        clause 4 of IETF RFC 7159. 
                      type: object
              instantiationState:
                description: |
                  The instantiation state of the VNF.
                type: string
                enum:
                  - NOT_INSTANTIATED
                  - INSTANTIATED
              instantiatedVnfInfo:
                description: >
                  Information specific to an instantiated VNF instance. This
                  attribute shall be present if the instantiateState attribute
                  value is INSTANTIATED.
                type: object
                required:
                  - flavourId
                  - vnfState
                properties:
                  flavourId:
                    description: |
                      An identifier that is unique within a VNF descriptor.
                    type: string
                  vnfState:
                    type: string
                    enum:
                      - STARTED
                      - STOPPED
                  scaleStatus:
                    description: >
                      Scale status of the VNF, one entry per aspect. Represents
                      for every scaling aspect how "big" the VNF has been scaled
                      w.r.t. that aspect.
                    type: array
                    items:
                      required:
                        - aspectId
                        - scaleLevel
                      type: object
                      properties:
                        aspectId:
                          description: >
                            An identifier that is unique within a VNF
                            descriptor.
                          type: string
                        scaleLevel:
                          description: >
                            Indicates the scale level. The minimum value shall
                            be 0 and the maximum value shall be <= maxScaleLevel
                            as described in the VNFD.
                          type: integer
                  extCpInfo:
                    description: >
                      Information about the external CPs exposed by the VNF
                      instance.
                    type: array
                    minItems: 1
                    items:
                      type: object
                      required:
                        - id
                        - cpdId
                      properties:
                        id:
                          description: >
                            An identifier that is unique for the respective type
                            within a VNF instance, but may not be globally
                            unique.
                          type: string
                        cpdId:
                          description: >
                            An identifier that is unique within a VNF
                            descriptor.
                          type: string
                        cpProtocolInfo:
                          description: |
                            Network protocol information for this CP.
                          type: array
                          items:
                            description: >
                              This type describes the protocol layer(s) that a
                              CP uses together with protocol-related
                              information, like addresses. 
                            required:
                              - layerProtocol
                            properties:
                              layerProtocol:
                                description: >
                                  The identifier of layer(s) and protocol(s)
                                  associated to the network address
                                  information.  Permitted values:
                                  IP_OVER_ETHERNET This attribute allows to
                                  signal the addition of further types of layer
                                  and protocol in future versions of the present
                                  document in a backwards-compatible way. In the
                                  current version of the present document, only
                                  IP over Ethernet is supported.
                                type: string
                                enum:
                                  - IP_OVER_ETHERNET
                              ipOverEthernet:
                                description: >
                                  This type represents information about a
                                  network address that has been assigned. 
                                type: object
                                required:
                                  - macAddress
                                properties:
                                  macAddress:
                                    description: >
                                      A MAC address. Representation: string that
                                      consists of groups of two hexadecimal
                                      digits, separated by hyphens or colons.
                                    type: string
                                    format: MAC
                                  ipAddresses:
                                    description: >
                                      Addresses assigned to the CP instance.
                                      Each entry represents IP addresses
                                      assigned by fixed or dynamic IP address
                                      assignment per subnet.
                                    type: array
                                    items:
                                      type: object
                                      required:
                                        - type
                                      properties:
                                        type:
                                          description: >
                                            The type of the IP addresses. Permitted
                                            values: IPV4, IPV6.
                                          type: string
                                          enum:
                                            - IPV4
                                            - IPV6
                                        addresses:
                                          description: >
                                            Fixed addresses assigned (from the
                                            subnet defined by "subnetId" if
                                            provided).
                                          type: array
                                          items:
                                            description: >
                                              An IPV4 or IPV6 address. Representation:
                                              In case of an IPV4 address, string that
                                              consists of four decimal integers
                                              separated by dots, each integer ranging
                                              from 0 to 255. In case of an IPV6
                                              address, string that  consists of groups
                                              of zero to four hexadecimal digits,
                                              separated by colons.
                                            type: string
                                            format: IP
                                        isDynamic:
                                          description: >
                                            Indicates whether this set of addresses
                                            was assigned dynamically (true) or based
                                            on address information provided as input
                                            from the API consumer (false). Shall be
                                            present if "addresses" is present and
                                            shall be absent otherwise.
                                          type: boolean
                                        addressRange:
                                          description: >
                                            An IP address range used, e.g., in case
                                            of egress connections. Exactly one of
                                            "addresses" or "addressRange" shall be
                                            present.
                                          type: object
                                          required:
                                            - minAddress
                                            - maxAddress
                                          properties:
                                            minAddress:
                                              description: >
                                                An IPV4 or IPV6 address. Representation:
                                                In case of an IPV4 address, string that
                                                consists of four decimal integers
                                                separated by dots, each integer ranging
                                                from 0 to 255. In case of an IPV6
                                                address, string that  consists of groups
                                                of zero to four hexadecimal digits,
                                                separated by colons.
                                              type: string
                                              format: IP
                                            maxAddress:
                                              description: >
                                                An IPV4 or IPV6 address. Representation:
                                                In case of an IPV4 address, string that
                                                consists of four decimal integers
                                                separated by dots, each integer ranging
                                                from 0 to 255. In case of an IPV6
                                                address, string that  consists of groups
                                                of zero to four hexadecimal digits,
                                                separated by colons.
                                              type: string
                                              format: IP
                                        subnetId:
                                          description: >
                                            An IPV4 or IPV6 address. Representation:
                                            In case of an IPV4 address, string that
                                            consists of four decimal integers
                                            separated by dots, each integer ranging
                                            from 0 to 255. In case of an IPV6
                                            address, string that  consists of groups
                                            of zero to four hexadecimal digits,
                                            separated by colons.
                                          type: string
                                          format: IP
                        extLinkPortId:
                          description: >
                            An identifier with the intention of being globally
                            unique.
                          type: string
                  extVirtualLinkInfo:
                    description: >
                      Information about the external VLs the VNF instance is
                      connected to.
                    type: array
                    items:
                      type: object
                      required:
                        - id
                        - resourceHandle
                      properties:
                        id:
                          description: >
                            An identifier with the intention of being globally
                            unique.
                          type: string
                        resourceHandle:
                          required:
                            - vimConnectionId
                            - resourceId
                          type: object
                          description: >
                            This type represents the information that allows
                            addressing a virtualised resource that is used by a
                            VNF instance. Information about the resource is
                            available from the VIM.
                          properties:
                            vimConnectionId:
                              description: >
                                An identifier with the intention of being
                                globally unique.
                              type: string
                            resourceProviderId:
                              description: >
                                An identifier with the intention of being
                                globally unique.
                              type: string
                            resourceId:
                              description: >
                                An identifier maintained by the VIM or other
                                resource provider. It is expected to be unique
                                within the VIM instance.
                              type: string
                            vimLevelResourceType:
                              description: >
                                Type of the resource in the scope of the VIM or
                                the resource provider.
                              type: string
                        extLinkPorts:
                          description: |
                            Link ports of this VL.
                          type: array
                          items:
                            description: >
                              This type represents information about a link port
                              of an external VL, i.e. a port providing
                              connectivity for the VNF to an NS VL. 
                            type: object
                            required:
                              - id
                              - resourceHandle
                            properties:
                              id:
                                description: >
                                  An identifier with the intention of being
                                  globally unique.
                                type: string
                              resourceHandle:
                                required:
                                  - vimConnectionId
                                  - resourceId
                                type: object
                                description: >
                                  This type represents the information that
                                  allows addressing a virtualised resource that
                                  is used by a VNF instance. Information about
                                  the resource is available from the VIM.
                                properties:
                                  vimConnectionId:
                                    description: >
                                      An identifier with the intention of being
                                      globally unique.
                                    type: string
                                  resourceProviderId:
                                    description: >
                                      An identifier with the intention of being
                                      globally unique.
                                    type: string
                                  resourceId:
                                    description: >
                                      An identifier maintained by the VIM or
                                      other resource provider. It is expected to
                                      be unique within the VIM instance.
                                    type: string
                                  vimLevelResourceType:
                                    description: >
                                      Type of the resource in the scope of the
                                      VIM or the resource provider.
                                    type: string
                              cpInstanceId:
                                description: >
                                  An identifier that is unique for the
                                  respective type within a VNF instance, but may
                                  not be globally unique.
                                type: string
                  extManagedVirtualLinkInfo:
                    description: |
                      External virtual links the VNF instance is connected to.
                    type: array
                    items:
                      type: object
                      required:
                        - id
                        - vnfVirtualLinkDescId
                      properties:
                        id:
                          description: >
                            An identifier with the intention of being globally
                            unique.
                          type: string
                        vnfVirtualLinkDescId:
                          description: >
                            An identifier that is unique for the respective type
                            within a VNF instance, but may not be globally
                            unique.
                          type: string
                        networkResource:
                          required:
                            - vimConnectionId
                            - resourceId
                          type: object
                          description: >
                            This type represents the information that allows
                            addressing a virtualised resource that is used by a
                            VNF instance. Information about the resource is
                            available from the VIM.
                          properties:
                            vimConnectionId:
                              description: >
                                An identifier with the intention of being
                                globally unique.
                              type: string
                            resourceProviderId:
                              description: >
                                An identifier with the intention of being
                                globally unique.
                              type: string
                            resourceId:
                              description: >
                                An identifier maintained by the VIM or other
                                resource provider. It is expected to be unique
                                within the VIM instance.
                              type: string
                            vimLevelResourceType:
                              description: >
                                Type of the resource in the scope of the VIM or
                                the resource provider.
                              type: string
                        vnfLinkPorts:
                          description: |
                            Link ports of this VL.
                          type: array
                          items:
                            type: object
                            required:
                              - id
                              - resourceHandle
                            properties:
                              id:
                                description: >
                                  An identifier that is unique for the
                                  respective type within a VNF instance, but may
                                  not be globally unique.
                                type: string
                              resourceHandle:
                                required:
                                  - vimConnectionId
                                  - resourceId
                                type: object
                                description: >
                                  This type represents the information that
                                  allows addressing a virtualised resource that
                                  is used by a VNF instance. Information about
                                  the resource is available from the VIM.
                                properties:
                                  vimConnectionId:
                                    description: >
                                      An identifier with the intention of being
                                      globally unique.
                                    type: string
                                  resourceProviderId:
                                    description: >
                                      An identifier with the intention of being
                                      globally unique.
                                    type: string
                                  resourceId:
                                    description: >
                                      An identifier maintained by the VIM or
                                      other resource provider. It is expected to
                                      be unique within the VIM instance.
                                    type: string
                                  vimLevelResourceType:
                                    description: >
                                      Type of the resource in the scope of the
                                      VIM or the resource provider.
                                    type: string
                              cpInstanceId:
                                description: >
                                  An identifier that is unique for the
                                  respective type within a VNF instance, but may
                                  not be globally unique.
                                type: string
                  monitoringParameters:
                    description: |
                      Active monitoring parameters.
                    type: array
                    items:
                      type: object
                      required:
                        - id
                        - value
                        - timeStamp
                      properties:
                        id:
                          description: >
                            An identifier that is unique within a VNF
                            descriptor.
                          type: string
                        name:
                          description: >
                            Human readable name of the monitoring parameter, as
                            defined in the VNFD.
                          type: string
                        value:
                          description: >
                            Value of the monitoring parameter known to the VNFM
                            (e.g. obtained for autoscaling purposes). The type
                            of the "value" attribute (i.e. scalar, structure
                            (Object in JSON), or array (of scalars, arrays or
                            structures/Objects)) is assumed to be defined in an
                            external measurement specification.
                          type: object
                        timeStamp:
                          description: >
                            Represents the point in time when the measurement
                            has been performed, as known to the VNFM. Should be
                            formatted according to ETF RFC 3339.
                          type: string
                  localizationLanguage:
                    description: >
                      Information about localization language of the VNF
                      (includes e.g. strings in the VNFD). The localization
                      languages supported by a VNF can be declared in the VNFD,
                      and localization language selection can take place at
                      instantiation time. The value shall comply with the format
                      defined in IETF RFC 5646.
                    type: string
                  vnfcResourceInfo:
                    description: >
                      Information about the virtualised compute and storage
                      resources used by the VNFCs of the VNF instance.
                    type: array
                    items:
                      description: >
                        This type represents the information on virtualised
                        compute and storage resources used by a VNFC in a VNF
                        instance.
                      type: object
                      required:
                        - id
                        - vduId
                        - computeResource
                      properties:
                        id:
                          description: >
                            An identifier that is unique for the respective type
                            within a VNF instance, but may not be globally
                            unique.
                          type: string
                        vduId:
                          description: >
                            An identifier that is unique within a VNF
                            descriptor.
                          type: string
                        computeResource:
                          required:
                            - vimConnectionId
                            - resourceId
                          type: object
                          description: >
                            This type represents the information that allows
                            addressing a virtualised resource that is used by a
                            VNF instance. Information about the resource is
                            available from the VIM.
                          properties:
                            vimConnectionId:
                              description: >
                                An identifier with the intention of being
                                globally unique.
                              type: string
                            resourceProviderId:
                              description: >
                                An identifier with the intention of being
                                globally unique.
                              type: string
                            resourceId:
                              description: >
                                An identifier maintained by the VIM or other
                                resource provider. It is expected to be unique
                                within the VIM instance.
                              type: string
                            vimLevelResourceType:
                              description: >
                                Type of the resource in the scope of the VIM or
                                the resource provider.
                              type: string
                        storageResourceIds:
                          description: >
                            References to the VirtualStorage resources. The
                            value refers to a VirtualStorageResourceInfo item in
                            the VnfInstance.
                          type: array
                          items:
                            description: >
                              An identifier that is unique for the respective
                              type within a VNF instance, but may not be
                              globally unique.
                            type: string
                        reservationId:
                          description: >
                            An identifier with the intention of being globally
                            unique.
                          type: string
                        vnfcCpInfo:
                          description: >
                            CPs of the VNFC instance. Shall be present when that
                            particular CP of the VNFC instance is associated to
                            an external CP of the VNF instance. May be present
                            otherwise.
                          type: array
                          items:
                            type: object
                            required:
                              - id
                              - cpdId
                            properties:
                              id:
                                description: >
                                  An identifier that is unique for the
                                  respective type within a VNF instance, but may
                                  not be globally unique.
                                type: string
                              cpdId:
                                description: >
                                  An identifier that is unique within a VNF
                                  descriptor.
                                type: string
                              vnfExtCpId:
                                description: >
                                  An identifier that is unique for the
                                  respective type within a VNF instance, but may
                                  not be globally unique.
                                type: string
                              cpProtocolInfo:
                                description: |
                                  Network protocol information for this CP.
                                type: array
                                items:
                                  description: >
                                    This type describes the protocol layer(s)
                                    that a CP uses together with
                                    protocol-related information, like
                                    addresses. 
                                  required:
                                    - layerProtocol
                                  properties:
                                    layerProtocol:
                                      description: >
                                        The identifier of layer(s) and
                                        protocol(s) associated to the network
                                        address information.  Permitted values:
                                        IP_OVER_ETHERNET This attribute allows
                                        to signal the addition of further types
                                        of layer and protocol in future versions
                                        of the present document in a
                                        backwards-compatible way. In the current
                                        version of the present document, only IP
                                        over Ethernet is supported.
                                      type: string
                                      enum:
                                        - IP_OVER_ETHERNET
                                    ipOverEthernet:
                                      description: >
                                        This type represents information about a
                                        network address that has been assigned. 
                                      type: object
                                      required:
                                        - macAddress
                                      properties:
                                        macAddress:
                                          description: >
                                            A MAC address. Representation: string
                                            that consists of groups of two
                                            hexadecimal digits, separated by hyphens
                                            or colons.
                                          type: string
                                          format: MAC
                                        ipAddresses:
                                          description: >
                                            Addresses assigned to the CP instance.
                                            Each entry represents IP addresses
                                            assigned by fixed or dynamic IP address
                                            assignment per subnet.
                                          type: array
                                          items:
                                            type: object
                                            required:
                                              - type
                                            properties:
                                              type:
                                                description: >
                                                  The type of the IP addresses. Permitted
                                                  values: IPV4, IPV6.
                                                type: string
                                                enum:
                                                  - IPV4
                                                  - IPV6
                                              addresses:
                                                description: >
                                                  Fixed addresses assigned (from the
                                                  subnet defined by "subnetId" if
                                                  provided).
                                                type: array
                                                items:
                                                  description: >
                                                    An IPV4 or IPV6 address. Representation:
                                                    In case of an IPV4 address, string that
                                                    consists of four decimal integers
                                                    separated by dots, each integer ranging
                                                    from 0 to 255. In case of an IPV6
                                                    address, string that  consists of groups
                                                    of zero to four hexadecimal digits,
                                                    separated by colons.
                                                  type: string
                                                  format: IP
                                              isDynamic:
                                                description: >
                                                  Indicates whether this set of addresses
                                                  was assigned dynamically (true) or based
                                                  on address information provided as input
                                                  from the API consumer (false). Shall be
                                                  present if "addresses" is present and
                                                  shall be absent otherwise.
                                                type: boolean
                                              addressRange:
                                                description: >
                                                  An IP address range used, e.g., in case
                                                  of egress connections. Exactly one of
                                                  "addresses" or "addressRange" shall be
                                                  present.
                                                type: object
                                                required:
                                                  - minAddress
                                                  - maxAddress
                                                properties:
                                                  minAddress:
                                                    description: >
                                                      An IPV4 or IPV6 address. Representation:
                                                      In case of an IPV4 address, string that
                                                      consists of four decimal integers
                                                      separated by dots, each integer ranging
                                                      from 0 to 255. In case of an IPV6
                                                      address, string that  consists of groups
                                                      of zero to four hexadecimal digits,
                                                      separated by colons.
                                                    type: string
                                                    format: IP
                                                  maxAddress:
                                                    description: >
                                                      An IPV4 or IPV6 address. Representation:
                                                      In case of an IPV4 address, string that
                                                      consists of four decimal integers
                                                      separated by dots, each integer ranging
                                                      from 0 to 255. In case of an IPV6
                                                      address, string that  consists of groups
                                                      of zero to four hexadecimal digits,
                                                      separated by colons.
                                                    type: string
                                                    format: IP
                                              subnetId:
                                                description: >
                                                  An IPV4 or IPV6 address. Representation:
                                                  In case of an IPV4 address, string that
                                                  consists of four decimal integers
                                                  separated by dots, each integer ranging
                                                  from 0 to 255. In case of an IPV6
                                                  address, string that  consists of groups
                                                  of zero to four hexadecimal digits,
                                                  separated by colons.
                                                type: string
                                                format: IP
                              vnfLinkPortId:
                                description: >
                                  An identifier that is unique for the
                                  respective type within a VNF instance, but may
                                  not be globally unique.
                                type: string
                        metadata:
                          description: >
                            This type represents a list of key-value pairs. The
                            order of the pairs in the list is not significant.
                            In JSON, a set of key- value pairs is represented as
                            an object. It shall comply with the provisions 
                            defined in clause 4 of IETF RFC 7159. 
                          type: object
                  virtualLinkResourceInfo:
                    description: >
                      Information about the virtualised network resources used
                      by the VLs of the VNF instance.
                    type: array
                    items:
                      description: >
                        This type represents the information that allows
                        addressing a virtualised resource that is used by an
                        internal VL instance in a VNF instance.
                      type: object
                      required:
                        - id
                        - vnfVirtualLinkDescId
                        - networkResource
                      properties:
                        id:
                          description: >
                            An identifier that is unique for the respective type
                            within a VNF instance, but may not be globally
                            unique.
                          type: string
                        vnfVirtualLinkDescId:
                          description: >
                            An identifier that is unique within a VNF
                            descriptor.
                          type: string
                        networkResource:
                          required:
                            - vimConnectionId
                            - resourceId
                          type: object
                          description: >
                            This type represents the information that allows
                            addressing a virtualised resource that is used by a
                            VNF instance. Information about the resource is
                            available from the VIM.
                          properties:
                            vimConnectionId:
                              description: >
                                An identifier with the intention of being
                                globally unique.
                              type: string
                            resourceProviderId:
                              description: >
                                An identifier with the intention of being
                                globally unique.
                              type: string
                            resourceId:
                              description: >
                                An identifier maintained by the VIM or other
                                resource provider. It is expected to be unique
                                within the VIM instance.
                              type: string
                            vimLevelResourceType:
                              description: >
                                Type of the resource in the scope of the VIM or
                                the resource provider.
                              type: string
                        reservationId:
                          description: >
                            An identifier with the intention of being globally
                            unique.
                          type: string
                        vnfLinkPorts:
                          description: >
                            Links ports of this VL. Shall be present when the
                            linkPort is used for external connectivity by the
                            VNF (refer to VnfLinkPortInfo). May be present
                            otherwise.
                          type: array
                          items:
                            type: object
                            required:
                              - id
                              - resourceHandle
                            properties:
                              id:
                                description: >
                                  An identifier that is unique for the
                                  respective type within a VNF instance, but may
                                  not be globally unique.
                                type: string
                              resourceHandle:
                                required:
                                  - vimConnectionId
                                  - resourceId
                                type: object
                                description: >
                                  This type represents the information that
                                  allows addressing a virtualised resource that
                                  is used by a VNF instance. Information about
                                  the resource is available from the VIM.
                                properties:
                                  vimConnectionId:
                                    description: >
                                      An identifier with the intention of being
                                      globally unique.
                                    type: string
                                  resourceProviderId:
                                    description: >
                                      An identifier with the intention of being
                                      globally unique.
                                    type: string
                                  resourceId:
                                    description: >
                                      An identifier maintained by the VIM or
                                      other resource provider. It is expected to
                                      be unique within the VIM instance.
                                    type: string
                                  vimLevelResourceType:
                                    description: >
                                      Type of the resource in the scope of the
                                      VIM or the resource provider.
                                    type: string
                              cpInstanceId:
                                description: >
                                  An identifier that is unique for the
                                  respective type within a VNF instance, but may
                                  not be globally unique.
                                type: string
                        metadata:
                          description: >
                            This type represents a list of key-value pairs. The
                            order of the pairs in the list is not significant.
                            In JSON, a set of key- value pairs is represented as
                            an object. It shall comply with the provisions 
                            defined in clause 4 of IETF RFC 7159. 
                          type: object
                  virtualStorageResourceInfo:
                    description: >
                      Information on the virtualised storage resource(s) used as
                      storage for the VNF instance.
                    type: array
                    items:
                      description: >
                        This type represents the information that allows
                        addressing a virtualised resource that is used by a VNF
                        instance.
                      type: object
                      required:
                        - id
                        - virtualStorageDescId
                        - storageResource
                      properties:
                        id:
                          description: >
                            An identifier that is unique for the respective type
                            within a VNF instance, but may not be globally
                            unique.
                          type: string
                        virtualStorageDescId:
                          description: >
                            An identifier that is unique within a VNF
                            descriptor.
                          type: string
                        storageResource:
                          required:
                            - vimConnectionId
                            - resourceId
                          type: object
                          description: >
                            This type represents the information that allows
                            addressing a virtualised resource that is used by a
                            VNF instance. Information about the resource is
                            available from the VIM.
                          properties:
                            vimConnectionId:
                              description: >
                                An identifier with the intention of being
                                globally unique.
                              type: string
                            resourceProviderId:
                              description: >
                                An identifier with the intention of being
                                globally unique.
                              type: string
                            resourceId:
                              description: >
                                An identifier maintained by the VIM or other
                                resource provider. It is expected to be unique
                                within the VIM instance.
                              type: string
                            vimLevelResourceType:
                              description: >
                                Type of the resource in the scope of the VIM or
                                the resource provider.
                              type: string
                        reservationId:
                          description: >
                            An identifier with the intention of being globally
                            unique.
                          type: string
                        metadata:
                          description: >
                            This type represents a list of key-value pairs. The
                            order of the pairs in the list is not significant.
                            In JSON, a set of key- value pairs is represented as
                            an object. It shall comply with the provisions 
                            defined in clause 4 of IETF RFC 7159. 
                          type: object
              metadata:
                description: >
                  This type represents a list of key-value pairs. The order of
                  the pairs in the list is not significant. In JSON, a set of
                  key- value pairs is represented as an object. It shall comply
                  with the provisions  defined in clause 4 of IETF RFC 7159. 
                type: object
              extensions:
                description: >
                  This type represents a list of key-value pairs. The order of
                  the pairs in the list is not significant. In JSON, a set of
                  key- value pairs is represented as an object. It shall comply
                  with the provisions  defined in clause 4 of IETF RFC 7159. 
                type: object
              _links:
                description: |
                  Links to resources related to this resource.
                type: object
                required:
                  - self
                properties:
                  self:
                    description: |
                      This type represents a link to a resource.
                    type: object
                    required:
                      - href
                    properties:
                      href:
                        description: |
                          URI of the referenced resource.
                        type: string
                        format: url
                  indicators:
                    description: |
                      This type represents a link to a resource.
                    type: object
                    required:
                      - href
                    properties:
                      href:
                        description: |
                          URI of the referenced resource.
                        type: string
                        format: url
                  instantiate:
                    description: |
                      This type represents a link to a resource.
                    type: object
                    required:
                      - href
                    properties:
                      href:
                        description: |
                          URI of the referenced resource.
                        type: string
                        format: url
                  terminate:
                    description: |
                      This type represents a link to a resource.