Iso20022

AcceptorCurrencyConversionAdviceV01

caaa.018.001.01

The AcceptorCurrencyConversionAdvice message is sent by the card acceptor to inform the currency conversion service provider of the outcome of the card currency conversion.

Message Construction

Every ISO20022 message has at the highest level what we call ‘building blocks’. Because the message is constructed as immutable records, the association is by composition. Below you can see the relationship between the message and its constituent building blocks: For comparison, see the ISO20022 official specification

classDiagram
     direction LR
%% AcceptorCurrencyConversionAdviceV01 recursion level 0 with max 0
AcceptorCurrencyConversionAdviceV01 *-- "1..1" Header34 : Header
AcceptorCurrencyConversionAdviceV01 *-- "1..1" AcceptorCurrencyConversionAdvice1 : AcceptorCurrencyConversionAdvice
AcceptorCurrencyConversionAdviceV01 *-- "0..1" ContentInformationType15 : SecurityTrailer

Now, we will zero-in one-by-one on each of these building blocks.

Header building block

Currency Conversion request message management information. Set of characteristics related to the protocol. For comparison, see the ISO20022 official specification

classDiagram
   direction tb
%% Header34 recursion level 0 with max 1
class Header34{
    MessageFunction MessageFunction13Code
    ProtocolVersion IsoMax6Text
    ExchangeIdentification IsoNumber
    ReTransmissionCounter IsoMax3NumericText
    CreationDateTime IsoISODateTime
}
Header34 *-- "1..1" GenericIdentification53 : InitiatingParty
Header34 *-- "0..1" GenericIdentification94 : RecipientParty
Header34 *-- "0..0" Traceability5 : Traceability
%% GenericIdentification53 recursion level 1 with max 1
class GenericIdentification53{
    Identification IsoMax35Text
    Type PartyType3Code
    Issuer PartyType4Code
    Country IsoMin2Max3AlphaText
    ShortName IsoMax35Text
}
%% GenericIdentification94 recursion level 1 with max 1
class GenericIdentification94{
    Identification IsoMax35Text
    Type PartyType3Code
    Issuer PartyType4Code
    Country IsoMin2Max3AlphaText
    ShortName IsoMax35Text
}
GenericIdentification94 *-- "0..1" NetworkParameters5 : RemoteAccess
%% Traceability5 recursion level 1 with max 1
class Traceability5{
    ProtocolName IsoMax35Text
    ProtocolVersion IsoMax6Text
    TraceDateTimeIn IsoISODateTime
    TraceDateTimeOut IsoISODateTime
}
Traceability5 *-- "1..1" GenericIdentification76 : RelayIdentification

Header34 members

Member name Description Data Type / Multiplicity
MessageFunction Identifies the type of process related to the message. MessageFunction13Code - Required 1..1
ProtocolVersion Version of the acquirer protocol specifications. IsoMax6Text - Required 1..1
ExchangeIdentification Unique identification of an exchange occurrence. IsoNumber - Required 1..1
ReTransmissionCounter Number of retransmissions of the message. IsoMax3NumericText - Optional 0..1
CreationDateTime Date and time at which the message was created. IsoISODateTime - Required 1..1
InitiatingParty Unique identification of the partner that has initiated the exchange. GenericIdentification53 - Required 1..1
RecipientParty Unique identification of the partner that is the recipient of the message exchange. GenericIdentification94 - Optional 0..1
Traceability Identification of partners involved in exchange from the merchant to the issuer, with the relative timestamp of their exchanges. Traceability5 - Unknown 0..0

AcceptorCurrencyConversionAdvice building block

Information related to the outcome of the currency conversion. Information related to the currency conversion advice. For comparison, see the ISO20022 official specification

classDiagram
   direction tb
%% AcceptorCurrencyConversionAdvice1 recursion level 0 with max 1
AcceptorCurrencyConversionAdvice1 *-- "1..1" CardPaymentEnvironment65 : Environment
AcceptorCurrencyConversionAdvice1 *-- "1..1" CardPaymentTransaction77 : Transaction
AcceptorCurrencyConversionAdvice1 *-- "0..1" CurrencyConversion13 : CurrencyConversionResult
%% CardPaymentEnvironment65 recursion level 1 with max 1
CardPaymentEnvironment65 *-- "0..1" GenericIdentification53 : AcquirerIdentification
CardPaymentEnvironment65 *-- "0..1" GenericIdentification32 : MerchantIdentification
CardPaymentEnvironment65 *-- "1..1" GenericIdentification32 : POIIdentification
CardPaymentEnvironment65 *-- "0..1" PaymentCard27 : Card
CardPaymentEnvironment65 *-- "0..1" CardPaymentToken2 : PaymentToken
%% CardPaymentTransaction77 recursion level 1 with max 1
class CardPaymentTransaction77{
    SaleReferenceIdentification IsoMax35Text
    InitiatorTransactionIdentification IsoMax35Text
    RecipientTransactionIdentification IsoMax35Text
    ReconciliationIdentification IsoMax35Text
    InterchangeData IsoMax140Text
    MerchantReferenceData IsoMax70Text
}
CardPaymentTransaction77 *-- "1..1" TransactionIdentifier1 : TransactionIdentification
CardPaymentTransaction77 *-- "1..1" CardPaymentTransactionDetails28 : TransactionDetails
%% CurrencyConversion13 recursion level 1 with max 1
class CurrencyConversion13{
    AcceptedByCardholder IsoTrueFalseIndicator
}
CurrencyConversion13 *-- "0..1" CurrencyConversion12 : Conversion

AcceptorCurrencyConversionAdvice1 members

Member name Description Data Type / Multiplicity
Environment Environment of the transaction. CardPaymentEnvironment65 - Required 1..1
Transaction Currency conversion of a card payment transaction between an acceptor and a currency conversion provider. CardPaymentTransaction77 - Required 1..1
CurrencyConversionResult Result of the currency conversion proposed to the cardholder and its result. CurrencyConversion13 - Optional 0..1

SecurityTrailer building block

Trailer of the message containing a MAC. General cryptographic message syntax (CMS) containing authenticated data. For comparison, see the ISO20022 official specification

classDiagram
   direction tb
%% ContentInformationType15 recursion level 0 with max 1
class ContentInformationType15{
    ContentType ContentType2Code
}
ContentInformationType15 *-- "1..1" AuthenticatedData4 : AuthenticatedData
%% AuthenticatedData4 recursion level 1 with max 1
class AuthenticatedData4{
    Version IsoNumber
    MAC IsoMax140Binary
}
AuthenticatedData4 *-- "1..0" IRecipient4Choice : Recipient
AuthenticatedData4 *-- "1..1" AlgorithmIdentification15 : MACAlgorithm
AuthenticatedData4 *-- "1..1" EncapsulatedContent3 : EncapsulatedContent

ContentInformationType15 members

Member name Description Data Type / Multiplicity
ContentType Type of data protection. ContentType2Code - Required 1..1
AuthenticatedData Data protection by a message authentication code (MAC). AuthenticatedData4 - Required 1..1

Extensibility and generalization considerations

To facilitate generalized design patterns in the system, the AcceptorCurrencyConversionAdviceV01 implementation follows a specific implementaiton pattern. First of all, AcceptorCurrencyConversionAdviceV01 impleemnts IOuterRecord indicating it is the outermost logical part of the message definition. Like all message wrappers, AcceptorCurrencyConversionAdviceV01Document implements IOuterDocument. Because AcceptorCurrencyConversionAdviceV01 implements IOuterDocument, it is a suitable template parameter for IOuterDocument, and causes the internal ‘Message’ to be of type AcceptorCurrencyConversionAdviceV01.

classDiagram
    class IOuterRecord
    AcceptorCurrencyConversionAdviceV01 --|> IOuterRecord : Implements
    AcceptorCurrencyConversionAdviceV01Document --|> IOuterDocument~AcceptorCurrencyConversionAdviceV01~ : Implements
    class IOuterDocument~AcceptorCurrencyConversionAdviceV01~ {
        AcceptorCurrencyConversionAdviceV01 Message
     }

Document wrapper for serialization

The only real purpose AcceptorCurrencyConversionAdviceV01Document serves is to cause the document to be serialized into the ‘urn:iso:std:iso:20022:tech:xsd:caaa.018.001.01’ namespace. Therefore, it will probably be the usual practice to build the message and construct this wrapper at the last minute using AcceptorCurrencyConversionAdviceV01.ToDocument() method. The returned AcceptorCurrencyConversionAdviceV01Document value will serialize correctly according to ISO 20022 standards.

classDiagram
    AcceptorCurrencyConversionAdviceV01Document *-- AcceptorCurrencyConversionAdviceV01 : Document

Sample of message format

This is an abbreviated version of what the message should look like.

<Document xmlns="urn:iso:std:iso:20022:tech:xsd:caaa.018.001.01">
    <AccptrCcyConvsAdvc>
        <Hdr>
            <!-- Header inner content -->
        </Hdr>
        <AccptrCcyConvsAdvc>
            <!-- AcceptorCurrencyConversionAdvice inner content -->
        </AccptrCcyConvsAdvc>
        <SctyTrlr>
            <!-- SecurityTrailer inner content -->
        </SctyTrlr>
    </AccptrCcyConvsAdvc>
</Document>

Data from ISO specification

This is the technical data from the specification document.

<messageDefinition
  xmi:id="_hZuJpRCEEeeriKqGwDrUEg"
  nextVersions="_BlOYEds5Eee9e6xduATmQg"
  name="AcceptorCurrencyConversionAdviceV01"
  definition="The AcceptorCurrencyConversionAdvice message is sent by the card acceptor to inform the currency conversion service provider of the outcome of the card currency conversion.&#xD;&#xA;"
  registrationStatus="Registered"
  messageSet="_urpIICeJEeOCeO5e7islRQ"
  xmlTag="AccptrCcyConvsAdvc"
  rootElement="Document"
  xmlns:xmi="http://www.omg.org/XMI">
  <doclet
    xmi:id="_hZuJoRCEEeeriKqGwDrUEg"
    type="purpose" />
  <messageBuildingBlock
    xmi:id="_hZuwsBCEEeeriKqGwDrUEg"
    nextVersions="_BlOYFds5Eee9e6xduATmQg"
    name="Header"
    definition="Currency Conversion request message management information."
    registrationStatus="Provisionally Registered"
    maxOccurs="1"
    minOccurs="1"
    xmlTag="Hdr"
    complexType="_begWIBCJEeeriKqGwDrUEg" />
  <messageBuildingBlock
    xmi:id="_6zEYEBhGEeeLm94vRX6ptg"
    nextVersions="_BlOYF9s5Eee9e6xduATmQg"
    name="AcceptorCurrencyConversionAdvice"
    definition="Information related to the outcome of the currency conversion."
    registrationStatus="Provisionally Registered"
    maxOccurs="1"
    minOccurs="1"
    xmlTag="AccptrCcyConvsAdvc"
    complexType="_I3RMACAxEeeqBb2eaJB13A" />
  <messageBuildingBlock
    xmi:id="_hZuwsRCEEeeriKqGwDrUEg"
    nextVersions="_BlOYGds5Eee9e6xduATmQg"
    name="SecurityTrailer"
    definition="Trailer of the message containing a MAC."
    registrationStatus="Provisionally Registered"
    maxOccurs="1"
    minOccurs="0"
    xmlTag="SctyTrlr"
    complexType="_uSOuUCrHEeWRf8RNsvC5fQ" />
  <messageDefinitionIdentifier
    businessArea="caaa"
    messageFunctionality="018"
    flavour="001"
    version="01" />
</messageDefinition>

ISO Building Blocks

The following items are used as building blocks to construct this message.