diff --git a/BankingClientModel/src/commonMain/kotlin/net/codinux/banking/client/model/AccountTransaction.kt b/BankingClientModel/src/commonMain/kotlin/net/codinux/banking/client/model/AccountTransaction.kt
index 98e79663..4c2bbe55 100644
--- a/BankingClientModel/src/commonMain/kotlin/net/codinux/banking/client/model/AccountTransaction.kt
+++ b/BankingClientModel/src/commonMain/kotlin/net/codinux/banking/client/model/AccountTransaction.kt
@@ -5,9 +5,9 @@ import net.codinux.banking.client.model.config.NoArgConstructor
 
 @NoArgConstructor
 open class AccountTransaction(
-    val amount: Amount = Amount.Zero,
+    val amount: Amount = Amount.Zero, // TODO: a string is really bad in UI, find a better solution
     val currency: String,
-    val unparsedReference: String, // Alternative: purpose (or Remittance information)
+    val reference: String, // Alternative: Remittance information, Transaction description, (payment) purpose, payment reference
 
     /**
      * Transaction date (Buchungstag) - der Tag, an dem ein Zahlungsvorgang in das System einer Bank eingegangen ist.
@@ -22,52 +22,56 @@ open class AccountTransaction(
      */
     val valueDate: LocalDate,
 
+    // deutsche Begriffe: "Transaktionspartei" oder "Beteiligte Partei"
+    // Englische: Transaction party (ist die beste Wahl für eine neutrale und übergreifende Beschreibung),
+    //            Counterparty (ist nützlich in formellen oder finanziellen Kontexten), Participant (ist breiter gefasst, aber weniger präzise)
     val otherPartyName: String? = null, // Alternatives: Parties involved, Transaction parties.single names: Beneficiary, Payee respectively Payer, Debtor
     val otherPartyBankCode: String? = null,
     val otherPartyAccountId: String? = null,
 
-    val bookingText: String? = null,
-    val information: String? = null,
-
-    val statementNumber: Int? = null,
-    val sequenceNumber: Int? = null,
+    val postingText: String? = null,
 
     val openingBalance: Amount? = null,
     val closingBalance: Amount? = null,
 
-    val endToEndReference: String? = null,
+    val statementNumber: Int? = null,
+    val sheetNumber: Int? = null,
+
     val customerReference: String? = null,
+    val bankReference: String? = null,
+    val furtherInformation: String? = null,
+
+    val endToEndReference: String? = null,
     val mandateReference: String? = null,
     val creditorIdentifier: String? = null,
     val originatorsIdentificationCode: String? = null,
     val compensationAmount: String? = null,
     val originalAmount: String? = null,
-    val sepaReference: String? = null,
     val deviantOriginator: String? = null,
     val deviantRecipient: String? = null,
     val referenceWithNoSpecialType: String? = null,
-    val primaNotaNumber: String? = null,
-    val textKeySupplement: String? = null,
 
-    val currencyType: String? = null,
-    val bookingKey: String? = null,
-    val referenceForTheAccountOwner: String? = null,
-    val referenceOfTheAccountServicingInstitution: String? = null,
-    val supplementaryDetails: String? = null,
+    val journalNumber: String? = null,
+    val textKeyAddition: String? = null,
 
-    val transactionReferenceNumber: String? = null,
-    val relatedReferenceNumber: String? = null,
+    val orderReferenceNumber: String? = null,
+    val referenceNumber: String? = null,
+
+    /**
+     * Storno, ob die Buchung storniert wurde(?).
+     * Aus:
+     * „RC“ = Storno Haben
+     * „RD“ = Storno Soll
+     */
+    val isReversal: Boolean = false,
 
     var userSetDisplayName: String? = null,
     var category: String? = null,
     var notes: String? = null,
 ) {
 
-    val reference: String
-        get() = sepaReference ?: unparsedReference
-
     open val identifier by lazy {
-        "$amount $currency $bookingDate $valueDate $unparsedReference $sepaReference $otherPartyName $otherPartyBankCode $otherPartyAccountId"
+        "$amount $currency $bookingDate $valueDate $reference $otherPartyName $otherPartyBankCode $otherPartyAccountId"
     }
 
     override fun toString() = "${valueDate.dayOfMonth}.${valueDate.monthNumber}.${valueDate.year} ${amount.toString().padStart(4, ' ')} ${if (currency == "EUR") "€" else currency} ${otherPartyName ?: ""} - $reference"
diff --git a/FinTs4jBankingClient/src/commonMain/kotlin/net/codinux/banking/client/fints4k/FinTs4kMapper.kt b/FinTs4jBankingClient/src/commonMain/kotlin/net/codinux/banking/client/fints4k/FinTs4kMapper.kt
index 5f08ffa5..d9959d9b 100644
--- a/FinTs4jBankingClient/src/commonMain/kotlin/net/codinux/banking/client/fints4k/FinTs4kMapper.kt
+++ b/FinTs4jBankingClient/src/commonMain/kotlin/net/codinux/banking/client/fints4k/FinTs4kMapper.kt
@@ -169,22 +169,23 @@ open class FinTs4kMapper {
         mapAmount(transaction.amount), transaction.amount.currency.code, transaction.unparsedReference,
         transaction.bookingDate, transaction.valueDate,
         transaction.otherPartyName, transaction.otherPartyBankCode, transaction.otherPartyAccountId,
-        transaction.bookingText, null,
-        transaction.statementNumber, transaction.sequenceNumber,
+
+        transaction.bookingText,
         mapNullableAmount(transaction.openingBalance), mapNullableAmount(transaction.closingBalance),
 
-        transaction.endToEndReference, transaction.customerReference, transaction.mandateReference,
-        transaction.creditorIdentifier, transaction.originatorsIdentificationCode,
-        transaction.compensationAmount, transaction.originalAmount,
-        transaction.sepaReference,
-        transaction.deviantOriginator, transaction.deviantRecipient,
-        transaction.referenceWithNoSpecialType, transaction.primaNotaNumber, transaction.textKeySupplement,
+        transaction.statementNumber, transaction.sequenceNumber,
 
-        transaction.currencyType, transaction.bookingKey,
         transaction.referenceForTheAccountOwner, transaction.referenceOfTheAccountServicingInstitution,
         transaction.supplementaryDetails,
 
-        transaction.transactionReferenceNumber, transaction.relatedReferenceNumber
+        transaction.endToEndReference, transaction.mandateReference,
+        transaction.creditorIdentifier, transaction.originatorsIdentificationCode,
+        transaction.compensationAmount, transaction.originalAmount,
+        transaction.deviantOriginator, transaction.deviantRecipient,
+        transaction.referenceWithNoSpecialType, transaction.primaNotaNumber, transaction.textKeySupplement,
+
+        transaction.transactionReferenceNumber, transaction.relatedReferenceNumber,
+        false
     )
 
     protected open fun mapNullableAmount(amount: Money?) = amount?.let { mapAmount(it) }