components:
  schemas:
    Link:
      description: >
        This type represents a link to a resource using an absolute URI.
      type: object
      required:
        - href
      properties:
        href:
          description: >
            URI of another resource referenced from a resource.
            Shall be an absolute URI (i.e. a UTI that contains {apiRoot}).
          $ref: "#/components/schemas/Uri"

    NotificationLink:
      description: >
        This type represents a link to a resource in a notification, using an absolute or relative URI.
      type: object
      required:
        - href
      properties:
        href:
          description: >
            URI of a resource referenced from a notification.
            Should be an absolute URI (i.e. a URI that contains
            {apiRoot}), however, may be a relative URI (i.e. a URI
            where the {apiRoot} part is omitted) if the {apiRoot}
            information is not available.
          $ref: "#/components/schemas/Uri"
    
    IpAddress:
      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

    KeyValuePairs:
      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 keyvalue pairs is represented as an object. It shall comply with the provisions defined in clause 4
        of IETF RFC 8259. In the following example, a list of key-value pairs with four keys ("aString", "aNumber",
        "anArray" and "anObject") is provided to illustrate that the values associated with different keys can be of
        different type.
      type: object

    ApiVersionInformation:
      description: >
        This type represents API version information.
      type: object
      required:
        - uriPrefix
        - apiVersions
      properties:
        uriPrefix:
          description: >
            Specifies the URI prefix for the API, in the following
            form {apiRoot}/{apiName}/{apiMajorVersion}/.
          type: string
        apiVersions:
          description: >
            Version(s) supported for the API signaled by the
            uriPrefix attribute.
          type: array
          items:
            type: object
            required:
              - version
            properties:
              version:
                description: >
                  Identifies a supported version. The value of the
                  version attribute shall be a version identifier as
                  specified in clause 9.1 (SOL013).
                type: string
              isDeprecated:
                description: >
                  If such information is available, this attribute indicates
                  whether use of the version signaled by the version
                  attribute is deprecated (true) or not (false).

                  A deprecated version is still supported by the API producer but is recommended
                  not to be used any longer.
                  When a version is no longer supported, it does not appear in the response body.
                type: boolean
              retirementDate:
                description: >
                  The date and time after which the API version will no
                  longer be supported.
                  This attribute may be included if the value of the
                  isDeprecated attribute is set to true and shall be
                  absent otherwise.
                $ref: "#/components/schemas/DateTime"

    Identifier:
      description: >
        An identifier with the intention of being globally unique.
      type: string

    IdentifierLocal:
      description: >
        An identifier that is unique within a limited local scope other than above listed identifiers,
        such as within a complex data structure or within a request-response pair.
        Representation: string of variable length.
      type: string

    DateTime:
      description: >
        Date-time stamp.
        Representation: String formatted according to IETF RFC 3339.
      type: string
      format: date-time

    Uri:
      description: >
        String formatted according to IETF RFC 3986.
      type: string

    Boolean:
      description: >
        The Boolean is a data type having two values (true and false).
      type: boolean

    Version:
      description: >
        A version.
      type: string

    String:
      description: >
        A string defined in IETF RFC 8259.
      type: string

    Number:
      description: >
        A number defined in IETF RFC 8259.
      type: number

    UnsignedInt:
      description: >
        Unsigned integer
      type: number

    SubscriptionAuthentication:
      type: object
      required:
        - authType
      properties:
        authType:
          description: >
            Defines the types of Authentication / Authorization which the API
            consumer is willing to accept when receiving a notification.
            Permitted values:
            * BASIC: In every HTTP request to the notification endpoint, use
              HTTP Basic authentication with the client credentials.
            * OAUTH2_CLIENT_CREDENTIALS: In every HTTP request to the
              notification endpoint, use an OAuth 2.0 Bearer token, obtained
              using the client credentials grant type.
            * TLS_CERT: Every HTTP request to the notification endpoint is sent
              over a mutually authenticated TLS session, i.e. not only the
              server is authenticated, but also the client is authenticated
              during the TLS tunnel setup.
          type: array
          items:
            type: string
            enum:
              - BASIC
              - OAUTH2_CLIENT_CREDENTIALS
              - TLS_CERT
        paramsBasic:
          description: >
            Parameters for authentication/authorization using BASIC.
            Shall be present if authType is "BASIC" and the contained
            information has not been provisioned out of band.
            Shall be absent otherwise.
          type: object
          properties:
            userName:
              description: >
                Username to be used in HTTP Basic authentication. Shall be
                present if it has not been provisioned out of band.
              type: string
            password:
              description: >
                Password to be used in HTTP Basic authentication. Shall be
                present if it has not been provisioned out of band.
              type: string
        paramsOauth2ClientCredentials:
          description: >
            Parameters for authentication/authorization using
            OAUTH2_CLIENT_CREDENTIALS.
            Shall be present if authType is "OAUTH2_CLIENT_CREDENTIALS" and the
            contained information has not been provisioned out of band.
            Shall be absent otherwise.
          type: object
          properties:
            clientId:
              description: >
                Client identifier to be used in the access token request of the
                OAuth 2.0 client credentials grant type.
                Shall be present if it has not been provisioned out of band.
                The clientId and clientPassword passed in a subscription shall
                not be the same as the clientId and clientPassword that are used
                to obtain authorization for API requests. Client credentials may
                differ between subscriptions. The value of clientPassword should
                be generated by a random process.
              type: string
            clientPassword:
              description: >
                Client password to be used in the access token request of the
                OAuth 2.0 client credentials grant type.
                Shall be present if it has not been provisioned out of band.
                The clientId and clientPassword passed in a subscription shall
                not be the same as the clientId and clientPassword that are used
                to obtain authorization for API requests. Client credentials may
                differ between subscriptions. The value of clientPassword should
                be generated by a random process.
              type: string
            tokenEndpoint:
              description: >
                The token endpoint from which the access token can be obtained.
                Shall be present if it has not been provisioned out of band.
              $ref: "#/components/schemas/Uri"

    ProblemDetails:
      description: >
        The definition of the general "ProblemDetails" data structure from
        IETF RFC 7807 [19] is reproduced inthis structure. Compared to the
        general framework defined in IETF RFC 7807 [19], the "status" and
        "detail" attributes are mandated to be included by the present document,
        to ensure that the response contains additional textual information about
        an error. IETF RFC 7807 [19] foresees extensibility of the
        "ProblemDetails" type. It is possible that particular APIs in the present
        document, or particular implementations, define extensions to define
        additional attributes that provide more information about the error.
        The description column only provides some explanation of the meaning to
        Facilitate understanding of the design. For a full description, see
        IETF RFC 7807 [19].
      type: object
      required:
        - status
        - detail
      properties:
        type:
          description: >
            A URI reference according to IETF RFC 3986 [5] that identifies the
            problem type. It is encouraged that the URI provides human-readable
            documentation for the problem (e.g. using HTML) when dereferenced.
            When this member is not present, its value is assumed to be
            "about:blank".
          type: string
          format: URI
        title:
          description: >
            A short, human-readable summary of the problem type. It should not
            change from occurrence to occurrence of the problem, except for
            purposes of localization. If type is given and other than
            "about:blank", this attribute shall also be provided.
            A short, human-readable summary of the problem
            type.  It SHOULD NOT change from occurrence to occurrence of the
            problem, except for purposes of localization (e.g., using
            proactive content negotiation; see [RFC7231], Section 3.4).
          type: string
        status:
          description: >
            The HTTP status code for this occurrence of the problem.
            The HTTP status code ([RFC7231], Section 6) generated by the origin
            server for this occurrence of the problem.
          type: integer
        detail:
          description: >
            A human-readable explanation specific to this occurrence of the
            problem.
          type: string
        instance:
          description: >
            A URI reference that identifies the specific occurrence of the
            problem. It may yield further information if dereferenced.
          type: string
          format: URI
        #TODO: How to express "any additional attributes"?

    ActivationStatus:
      description: >
        The enumeration ActivationStatus shall comply with the provisions defined in table 5.6.4.3-1.
        It indicates the activation status of a policy.
      type: string
      enum:
        - ACTIVATED
        - DEACTIVATED

    TransferStatus:
      description: >
        The enumeration TransferStatus shall comply with the provisions defined in table 5.6.4.4-1.
        It indicates the transfer status of a policy
      type: string
      enum:
        - CREATED
        - TRANSFERRED

    PolicyModifications:
      description: >
        This type represents the parameters for modifying a policy. It shall comply with the provisions
        defined in table 5.6.2.4-1
      type: object
      properties:
        activationStatus:
          description: >
            New activation status of the policy.
          $ref: "#/components/schemas/ActivationStatus"
        selectedVersion:
          description: >
            New version of the policy to be selected.
          $ref: "../components/SOL012_schemas.yaml#/components/schemas/Version"
        addAssociations:
          description: >
            Identifiers of entities to be added to the “associations” attribute in the “Policy”
            data structure which represents the policy.
            The API producer shall ignore the identifiers that already exist in the "associations"
            attribute in the “Policy” data structure.
          type: array
          items:
            $ref: "../components/SOL012_schemas.yaml#/components/schemas/Identifier"
        removeAssociations:
          description: >
            Identifiers of entities to be removed from the “associations” attribute in the “Policy” data structure
            which represents the policy.
            The API producer shall ignore the identifiers that do not exist in the "associations"
            attribute in the “Policy” data structure
          type: array
          items:
            $ref: "../components/SOL012_schemas.yaml#/components/schemas/Identifier"
        removeAllAssociations:
          description: >
            Shall be set to TRUE if the policy is no longer associated to any specific entities managed by the PF.ù
            If "removeAllAssociations" is set to TRUE, neither "addAssociations" nor “removeAssociations” attributes
            shall be present.
            Once all associations have been removed, how the PF determines the scope of applicability of
            the policy is outside the scope of the present document.
          type: boolean

    PolicyOperationType:
      description: >
        The enumeration PolicyOperationType shall comply with the provisions defined in table 5.6.4.4-1. 
        It indicates the type of the policy change.
        Permitted values:
        * CREATE_POLICY:	The policy is created.
        * TRANSFER_POLICY:	The policy is transferred.
        * DELETE_POLICY:	The policy is deleted.
        * MODIFY_POLICY:	The policy is modified.
      type: string
      enum:
        - CREATE_POLICY
        - TRANSFER_POLICY
        - DELETE_POLICY
        - MODIFY_POLICY