Thanks, this is somewhat helpfull but the field I need is a but more difficult to find, it is not unique.
I need the value in field IdValue where idOwner = "KvK".
Is this possible?
<AdditionalData>
<StaffingAdditionalData>
<CustomerReportingRequirements>
<PurchaseOrderNumber>4357435</PurchaseOrderNumber>
<CustomerReferenceNumber>43545453443</CustomerReferenceNumber>
<PurchaseOrderLineItem>00001</PurchaseOrderLineItem>
</CustomerReportingRequirements>
<ReferenceInformation>
<OrderId idOwner="StaffingCustomer">
<IdValue>546576653</IdValue>
</OrderId>
<StaffingSupplierId idOwner="StaffingCustomer">
<IdValue>346554</IdValue>
</StaffingSupplierId>
<StaffingSupplierId idOwner="KvK">
<IdValue>547365737635</IdValue>
</StaffingSupplierId>
<StaffingCustomerId idOwner="StaffingCustomer">
<IdValue>FC70</IdValue>
</StaffingCustomerId>
<StaffingCustomerId idOwner="OIN">
<IdValue>57645654646</IdValue>
</StaffingCustomerId>
</ReferenceInformation>
</StaffingAdditionalData>
</AdditionalData>