1 package SL::DB::Helper::ZUGFeRD;
 
   6 use parent qw(Exporter);
 
   7 our @EXPORT = qw(create_zugferd_data create_zugferd_xmp_data);
 
   9 use SL::DB::GenericTranslation;
 
  12 use SL::Helper::ISO3166;
 
  13 use SL::Helper::ISO4217;
 
  14 use SL::Helper::UNECERecommendation20;
 
  17 use Encode qw(encode);
 
  18 use List::MoreUtils qw(any pairwise);
 
  19 use List::Util qw(first sum);
 
  23 my @line_names = qw(LineOne LineTwo LineThree);
 
  27   return encode('UTF-8', $value // '');
 
  32   return $::form->round_amount($value, 2);
 
  37   my $type   = $self->invoice_type;
 
  40   return $type eq 'ar_transaction' ? $::locale->text('Invoice') : $self->displayable_type;
 
  45   my $type   = $self->invoice_type;
 
  47   # 326 (Partial invoice)
 
  48   # 380 (Commercial invoice)
 
  49   # 384 (Corrected Invoice)
 
  51   # 389 (Credit note, self billed invoice)
 
  53   return $type eq 'credit_note'        ? 381
 
  54        : $type eq 'invoice_storno'     ? 457
 
  55        : $type eq 'credit_note_storno' ? 458
 
  62   # Mapping from kivitendo's units to UN/ECE Recommendation 20 & 21.
 
  63   my $code = SL::Helper::UNECERecommendation20::map_name_to_code($unit);
 
  64   return $code if $code;
 
  66   $::lxdebug->message(LXDebug::WARN(), "ZUGFeRD unit name mapping: no UN/ECE Recommendation 20/21 unit known for kivitendo unit '$unit'; using 'C62'");
 
  71 sub _parse_our_address {
 
  73   my @street = grep { $_ } ($::instance_conf->get_address_street1, $::instance_conf->get_address_street2);
 
  75   push @result, [ 'PostcodeCode', $::instance_conf->get_address_zipcode ] if $::instance_conf->get_address_zipcode;
 
  76   push @result, grep { $_->[1] } pairwise { [ $a, $b] } @line_names, @street;
 
  77   push @result, [ 'CityName', $::instance_conf->get_address_city ] if $::instance_conf->get_address_city;
 
  78   push @result, [ 'CountryID', SL::Helper::ISO3166::map_name_to_alpha_2_code($::instance_conf->get_address_country) // 'DE' ];
 
  83 sub _customer_postal_trade_address {
 
  86   #       <ram:PostalTradeAddress>
 
  87   $params{xml}->startTag("ram:PostalTradeAddress");
 
  89   my @parts = grep { $_ } map { $params{customer}->$_ } qw(department_1 department_2 street);
 
  91   $params{xml}->dataElement("ram:PostcodeCode", _u8($params{customer}->zipcode));
 
  92   $params{xml}->dataElement("ram:" . $_->[0],   _u8($_->[1])) for grep { $_->[1] } pairwise { [ $a, $b] } @line_names, @parts;
 
  93   $params{xml}->dataElement("ram:CityName",     _u8($params{customer}->city));
 
  94   $params{xml}->dataElement("ram:CountryID",    _u8(SL::Helper::ISO3166::map_name_to_alpha_2_code($params{customer}->country) // 'DE'));
 
  96   #       </ram:PostalTradeAddress>
 
  99 sub _tax_rate_and_code {
 
 100   my ($taxzone, $tax) = @_;
 
 102   my ($tax_rate, $tax_code) = @_;
 
 104   if ($taxzone->description =~ m{Au.*erhalb}) {
 
 108   } elsif ($taxzone->description =~ m{EU mit}) {
 
 113     $tax_rate = $tax->rate * 100;
 
 114     $tax_code = !$tax_rate ? 'Z' : 'S';
 
 117   return (rate => $tax_rate, code => $tax_code);
 
 121   my ($self, %params) = @_;
 
 123   my $item_ptc = $params{ptc_data}->{items}->[$params{line_number}];
 
 125   my $taxkey   = $item_ptc->{taxkey_id} ? SL::DB::TaxKey->load_cached($item_ptc->{taxkey_id}) : undef;
 
 126   my $tax      = $item_ptc->{taxkey_id} ? SL::DB::Tax->load_cached($taxkey->tax_id)           : undef;
 
 127   my %tax_info = _tax_rate_and_code($self->taxzone, $tax);
 
 129   # <ram:IncludedSupplyChainTradeLineItem>
 
 130   $params{xml}->startTag("ram:IncludedSupplyChainTradeLineItem");
 
 132   #   <ram:AssociatedDocumentLineDocument>
 
 133   $params{xml}->startTag("ram:AssociatedDocumentLineDocument");
 
 134   $params{xml}->dataElement("ram:LineID", $params{line_number} + 1);
 
 135   $params{xml}->endTag;
 
 137   $params{xml}->startTag("ram:SpecifiedTradeProduct");
 
 138   $params{xml}->dataElement("ram:SellerAssignedID", _u8($params{item}->part->partnumber));
 
 139   $params{xml}->dataElement("ram:Name",             _u8($params{item}->description));
 
 140   $params{xml}->endTag;
 
 142   $params{xml}->startTag("ram:SpecifiedLineTradeAgreement");
 
 143   $params{xml}->startTag("ram:NetPriceProductTradePrice");
 
 144   $params{xml}->dataElement("ram:ChargeAmount", _r2($item_ptc->{sellprice}));
 
 145   $params{xml}->endTag;
 
 146   $params{xml}->endTag;
 
 147   #   </ram:SpecifiedLineTradeAgreement>
 
 149   #   <ram:SpecifiedLineTradeDelivery>
 
 150   $params{xml}->startTag("ram:SpecifiedLineTradeDelivery");
 
 151   $params{xml}->dataElement("ram:BilledQuantity", $params{item}->qty, "unitCode" => _unit_code($params{item}->unit));
 
 152   $params{xml}->endTag;
 
 153   #   </ram:SpecifiedLineTradeDelivery>
 
 155   #   <ram:SpecifiedLineTradeSettlement>
 
 156   $params{xml}->startTag("ram:SpecifiedLineTradeSettlement");
 
 158   #     <ram:ApplicableTradeTax>
 
 159   $params{xml}->startTag("ram:ApplicableTradeTax");
 
 160   $params{xml}->dataElement("ram:TypeCode",              "VAT");
 
 161   $params{xml}->dataElement("ram:CategoryCode",          $tax_info{code});
 
 162   $params{xml}->dataElement("ram:RateApplicablePercent", _r2($tax_info{rate}));
 
 163   $params{xml}->endTag;
 
 164   #     </ram:ApplicableTradeTax>
 
 166   #     <ram:SpecifiedTradeSettlementLineMonetarySummation>
 
 167   $params{xml}->startTag("ram:SpecifiedTradeSettlementLineMonetarySummation");
 
 168   $params{xml}->dataElement("ram:LineTotalAmount", _r2($item_ptc->{linetotal}));
 
 169   $params{xml}->endTag;
 
 170   #     </ram:SpecifiedTradeSettlementLineMonetarySummation>
 
 172   $params{xml}->endTag;
 
 173   #   </ram:SpecifiedLineTradeSettlement>
 
 175   $params{xml}->endTag;
 
 176   # <ram:IncludedSupplyChainTradeLineItem>
 
 180   my ($self, %params) = @_;
 
 184   foreach my $item (@{ $params{ptc_data}->{items} }) {
 
 185     $taxkey_info{$item->{taxkey_id}} //= {
 
 189     my $info             = $taxkey_info{$item->{taxkey_id}};
 
 190     $info->{taxkey}    //= SL::DB::TaxKey->load_cached($item->{taxkey_id});
 
 191     $info->{tax}       //= SL::DB::Tax->load_cached($info->{taxkey}->tax_id);
 
 192     $info->{linetotal}  += $item->{linetotal};
 
 193     $info->{tax_amount} += $item->{tax_amount};
 
 196   foreach my $taxkey_id (sort keys %taxkey_info) {
 
 197     my $info     = $taxkey_info{$taxkey_id};
 
 198     my %tax_info = _tax_rate_and_code($self->taxzone, $info->{tax});
 
 200     #     <ram:ApplicableTradeTax>
 
 201     $params{xml}->startTag("ram:ApplicableTradeTax");
 
 202     $params{xml}->dataElement("ram:CalculatedAmount",      _r2($params{ptc_data}->{taxes}->{$info->{tax}->{chart_id}}));
 
 203     $params{xml}->dataElement("ram:TypeCode",              "VAT");
 
 204     $params{xml}->dataElement("ram:BasisAmount",           _r2($info->{linetotal}));
 
 205     $params{xml}->dataElement("ram:CategoryCode",          $tax_info{code});
 
 206     $params{xml}->dataElement("ram:RateApplicablePercent", _r2($tax_info{rate}));
 
 207     $params{xml}->endTag;
 
 208     #     </ram:ApplicableTradeTax>
 
 212 sub _format_payment_terms_description {
 
 215   my (%vars, %amounts, %formatted_amounts);
 
 217   local $::myconfig{numberformat} = $::myconfig{numberformat};
 
 218   local $::myconfig{dateformat}   = $::myconfig{dateformat};
 
 220   if ($self->language_id) {
 
 221     my $language = SL::DB::Language->load_cached($self->language_id);
 
 222     $::myconfig{dateformat}   = $language->output_dateformat   if $language->output_dateformat;
 
 223     $::myconfig{numberformat} = $language->output_numberformat if $language->output_numberformat;
 
 226   $vars{currency}              = $self->currency->name if $self->currency;
 
 227   $vars{$_}                    = $self->customer->$_      for qw(account_number bank bank_code bic iban mandate_date_of_signature mandator_id);
 
 228   $vars{$_}                    = $self->payment_terms->$_ for qw(terms_netto terms_skonto percent_skonto);
 
 229   $vars{payment_description}   = $self->payment_terms->description;
 
 230   $vars{netto_date}            = $self->payment_terms->calc_date(reference_date => $self->transdate, due_date => $self->duedate, terms => 'net')->to_kivitendo;
 
 231   $vars{skonto_date}           = $self->payment_terms->calc_date(reference_date => $self->transdate, due_date => $self->duedate, terms => 'discount')->to_kivitendo;
 
 233   $amounts{invtotal}           = $self->amount;
 
 234   $amounts{total}              = $self->amount - $self->paid;
 
 236   $amounts{skonto_in_percent}  = 100.0 * $vars{percent_skonto};
 
 237   $amounts{skonto_amount}      = $amounts{invtotal} * $vars{percent_skonto};
 
 238   $amounts{invtotal_wo_skonto} = $amounts{invtotal} * (1 - $vars{percent_skonto});
 
 239   $amounts{total_wo_skonto}    = $amounts{total}    * (1 - $vars{percent_skonto});
 
 241   foreach (keys %amounts) {
 
 242     $amounts{$_}           = $::form->round_amount($amounts{$_}, 2);
 
 243     $formatted_amounts{$_} = $::form->format_amount(\%::myconfig, $amounts{$_}, 2);
 
 246   my $description = ($self->payment_terms->translated_attribute('description_long_invoice', $self->language_id) // '') || $self->payment_terms->description_long_invoice;
 
 247   $description    =~ s{<\%$_\%>}{ $vars{$_} }ge              for keys %vars;
 
 248   $description    =~ s{<\%$_\%>}{ $formatted_amounts{$_} }ge for keys %formatted_amounts;
 
 254   my ($self, %params) = @_;
 
 256   return unless $self->payment_terms;
 
 258   #     <ram:SpecifiedTradePaymentTerms>
 
 259   $params{xml}->startTag("ram:SpecifiedTradePaymentTerms");
 
 261   $params{xml}->dataElement("ram:Description", _u8(_format_payment_terms_description($self)));
 
 263   #       <ram:DueDateDateTime>
 
 264   $params{xml}->startTag("ram:DueDateDateTime");
 
 265   $params{xml}->dataElement("udt:DateTimeString", $self->duedate->strftime('%Y%m%d'), "format" => "102");
 
 266   $params{xml}->endTag;
 
 267   #       </ram:DueDateDateTime>
 
 269   if ($self->payment_terms->percent_skonto && $self->payment_terms->terms_skonto) {
 
 270     #       <ram:ApplicableTradePaymentDiscountTerms>
 
 271     $params{xml}->startTag("ram:ApplicableTradePaymentDiscountTerms");
 
 272     $params{xml}->dataElement("ram:BasisPeriodMeasure", $self->payment_terms->terms_skonto, "unitCode" => "DAY");
 
 273     $params{xml}->dataElement("ram:CalculationPercent", _r2($self->payment_terms->percent_skonto * 100));
 
 274     $params{xml}->endTag;
 
 275     #       </ram:ApplicableTradePaymentDiscountTerms>
 
 278   $params{xml}->endTag;
 
 279   #     </ram:SpecifiedTradePaymentTerms>
 
 283   my ($self, %params) = @_;
 
 285   #     <ram:SpecifiedTradeSettlementHeaderMonetarySummation>
 
 286   $params{xml}->startTag("ram:SpecifiedTradeSettlementHeaderMonetarySummation");
 
 288   $params{xml}->dataElement("ram:LineTotalAmount",     _r2($self->netamount));
 
 289   $params{xml}->dataElement("ram:TaxBasisTotalAmount", _r2($self->netamount));
 
 290   $params{xml}->dataElement("ram:TaxTotalAmount",      _r2(sum(values %{ $params{ptc_data}->{taxes} })), "currencyID" => "EUR");
 
 291   $params{xml}->dataElement("ram:GrandTotalAmount",    _r2($self->amount));
 
 292   $params{xml}->dataElement("ram:TotalPrepaidAmount",  _r2($self->paid));
 
 293   $params{xml}->dataElement("ram:DuePayableAmount",    _r2($self->amount - $self->paid));
 
 295   $params{xml}->endTag;
 
 296   #     </ram:SpecifiedTradeSettlementHeaderMonetarySummation>
 
 299 sub _exchanged_document_context {
 
 300   my ($self, %params) = @_;
 
 302   #   <rsm:ExchangedDocumentContext>
 
 303   $params{xml}->startTag("rsm:ExchangedDocumentContext");
 
 305   if ($::instance_conf->get_create_zugferd_invoices == 2) {
 
 306     $params{xml}->startTag("ram:TestIndicator");
 
 307     $params{xml}->dataElement("udt:Indicator", "true");
 
 308     $params{xml}->endTag;
 
 311   $params{xml}->startTag("ram:GuidelineSpecifiedDocumentContextParameter");
 
 312   $params{xml}->dataElement("ram:ID", "urn:cen.eu:en16931:2017#conformant#urn:zugferd.de:2p0:extended");
 
 313   $params{xml}->endTag;
 
 314   $params{xml}->endTag;
 
 315   #   </rsm:ExchangedDocumentContext>
 
 319   my ($self, %params) = @_;
 
 321   $params{xml}->startTag("ram:IncludedNote");
 
 322   $params{xml}->dataElement("ram:Content", _u8($params{note}));
 
 323   $params{xml}->endTag;
 
 326 sub _exchanged_document {
 
 327   my ($self, %params) = @_;
 
 329   #   <rsm:ExchangedDocument>
 
 330   $params{xml}->startTag("rsm:ExchangedDocument");
 
 332   $params{xml}->dataElement("ram:ID",       _u8($self->invnumber));
 
 333   $params{xml}->dataElement("ram:Name",     _u8(_type_name($self)));
 
 334   $params{xml}->dataElement("ram:TypeCode", _u8(_type_code($self)));
 
 336   #     <ram:IssueDateTime>
 
 337   $params{xml}->startTag("ram:IssueDateTime");
 
 338   $params{xml}->dataElement("udt:DateTimeString", $self->transdate->strftime('%Y%m%d'), "format" => "102");
 
 339   $params{xml}->endTag;
 
 340   #     </ram:IssueDateTime>
 
 342   if ($self->language && (($self->language->template_code // '') =~ m{^(de|en)}i)) {
 
 343     $params{xml}->dataElement("ram:LanguageID", uc($1));
 
 346   my $std_notes = SL::DB::Manager::GenericTranslation->get_all(
 
 348       translation_type => 'ZUGFeRD/notes',
 
 350         language_id    => undef,
 
 351         language_id    => $self->language_id,
 
 353       '!translation'   => undef,
 
 354       '!translation'   => '',
 
 358   my $std_note = first { $_->language_id == $self->language_id } @{ $std_notes };
 
 359   $std_note  //= first { !defined $_->language_id }              @{ $std_notes };
 
 361   my $notes = $self->notes_as_stripped_html;
 
 363   _included_note($self, %params, note => $self->transaction_description) if $self->transaction_description;
 
 364   _included_note($self, %params, note => $notes)                         if $notes;
 
 365   _included_note($self, %params, note => $std_note->translation)         if $std_note;
 
 367   $params{xml}->endTag;
 
 368   #   </rsm:ExchangedDocument>
 
 371 sub _seller_trade_party {
 
 372   my ($self, %params) = @_;
 
 374   my @our_address            = _parse_our_address();
 
 376   my $sales_person           = $self->salesman;
 
 377   my $sales_person_auth      = SL::DB::Manager::AuthUser->find_by(login => $sales_person->login);
 
 378   my %sales_person_cfg       = $sales_person_auth ? %{ $sales_person_auth->config_values } : ();
 
 379   $sales_person_cfg{email} ||= $sales_person->deleted_email;
 
 380   $sales_person_cfg{tel}   ||= $sales_person->deleted_tel;
 
 382   #       <ram:SellerTradeParty>
 
 383   $params{xml}->startTag("ram:SellerTradeParty");
 
 384   $params{xml}->dataElement("ram:ID",   _u8($self->customer->c_vendor_id)) if ($self->customer->c_vendor_id // '') ne '';
 
 385   $params{xml}->dataElement("ram:Name", _u8($::instance_conf->get_company));
 
 387   #         <ram:DefinedTradeContact>
 
 388   $params{xml}->startTag("ram:DefinedTradeContact");
 
 390   $params{xml}->dataElement("ram:PersonName", _u8($sales_person_cfg{name} || $sales_person_cfg{login}));
 
 392   if ($sales_person_cfg{tel}) {
 
 393     $params{xml}->startTag("ram:TelephoneUniversalCommunication");
 
 394     $params{xml}->dataElement("ram:CompleteNumber", _u8($sales_person_cfg{tel}));
 
 395     $params{xml}->endTag;
 
 398   if ($sales_person_cfg{email}) {
 
 399     $params{xml}->startTag("ram:EmailURIUniversalCommunication");
 
 400     $params{xml}->dataElement("ram:URIID", _u8($sales_person_cfg{email}));
 
 401     $params{xml}->endTag;
 
 404   $params{xml}->endTag;
 
 405   #         </ram:DefinedTradeContact>
 
 408     #         <ram:PostalTradeAddress>
 
 409     $params{xml}->startTag("ram:PostalTradeAddress");
 
 410     foreach my $element (@our_address) {
 
 411       $params{xml}->dataElement("ram:" . $element->[0], _u8($element->[1]));
 
 413     $params{xml}->endTag;
 
 414     #         </ram:PostalTradeAddress>
 
 417   my $ustid_nr = $::instance_conf->get_co_ustid;
 
 418   $ustid_nr    = "DE$ustid_nr" unless $ustid_nr =~ m{^[A-Z]{2}};
 
 419   #         <ram:SpecifiedTaxRegistration>
 
 420   $params{xml}->startTag("ram:SpecifiedTaxRegistration");
 
 421   $params{xml}->dataElement("ram:ID", _u8($ustid_nr), "schemeID" => "VA");
 
 422   $params{xml}->endTag;
 
 423   #         </ram:SpecifiedTaxRegistration>
 
 425   $params{xml}->endTag;
 
 426   #     </ram:SellerTradeParty>
 
 429 sub _buyer_trade_party {
 
 430   my ($self, %params) = @_;
 
 432   #       <ram:BuyerTradeParty>
 
 433   $params{xml}->startTag("ram:BuyerTradeParty");
 
 434   $params{xml}->dataElement("ram:ID",   _u8($self->customer->customernumber));
 
 435   $params{xml}->dataElement("ram:Name", _u8($self->customer->name));
 
 437   _customer_postal_trade_address(%params, customer => $self->customer);
 
 439   $params{xml}->endTag;
 
 440   #       </ram:BuyerTradeParty>
 
 443 sub _included_supply_chain_trade_line_item {
 
 444   my ($self, %params) = @_;
 
 447   foreach my $item (@{ $self->items }) {
 
 448     _line_item($self, %params, item => $item, line_number => $line_number);
 
 453 sub _applicable_header_trade_agreement {
 
 454   my ($self, %params) = @_;
 
 456   #     <ram:ApplicableHeaderTradeAgreement>
 
 457   $params{xml}->startTag("ram:ApplicableHeaderTradeAgreement");
 
 459   _seller_trade_party($self, %params);
 
 460   _buyer_trade_party($self, %params);
 
 462   if ($self->cusordnumber) {
 
 463     #     <ram:BuyerOrderReferencedDocument>
 
 464     $params{xml}->startTag("ram:BuyerOrderReferencedDocument");
 
 465     $params{xml}->dataElement("ram:IssuerAssignedID", _u8($self->cusordnumber));
 
 466     $params{xml}->endTag;
 
 467     #     </ram:BuyerOrderReferencedDocument>
 
 470   $params{xml}->endTag;
 
 471   #     </ram:ApplicableHeaderTradeAgreement>
 
 474 sub _applicable_header_trade_delivery {
 
 475   my ($self, %params) = @_;
 
 477   #     <ram:ApplicableHeaderTradeDelivery>
 
 478   $params{xml}->startTag("ram:ApplicableHeaderTradeDelivery");
 
 479   #       <ram:ActualDeliverySupplyChainEvent>
 
 480   $params{xml}->startTag("ram:ActualDeliverySupplyChainEvent");
 
 482   $params{xml}->startTag("ram:OccurrenceDateTime");
 
 483   $params{xml}->dataElement("udt:DateTimeString", ($self->deliverydate // $self->transdate)->strftime('%Y%m%d'), "format" => "102");
 
 484   $params{xml}->endTag;
 
 486   $params{xml}->endTag;
 
 487   #       </ram:ActualDeliverySupplyChainEvent>
 
 488   $params{xml}->endTag;
 
 489   #     </ram:ApplicableHeaderTradeDelivery>
 
 492 sub _applicable_header_trade_settlement {
 
 493   my ($self, %params) = @_;
 
 495   #     <ram:ApplicableHeaderTradeSettlement>
 
 496   $params{xml}->startTag("ram:ApplicableHeaderTradeSettlement");
 
 497   $params{xml}->dataElement("ram:InvoiceCurrencyCode", _u8(SL::Helper::ISO4217::map_currency_name_to_code($self->currency->name) // 'EUR'));
 
 499   _taxes($self, %params);
 
 500   _payment_terms($self, %params);
 
 501   _totals($self, %params);
 
 503   $params{xml}->endTag;
 
 504   #     </ram:ApplicableHeaderTradeSettlement>
 
 507 sub _supply_chain_trade_transaction {
 
 508   my ($self, %params) = @_;
 
 510   #   <rsm:SupplyChainTradeTransaction>
 
 511   $params{xml}->startTag("rsm:SupplyChainTradeTransaction");
 
 513   _included_supply_chain_trade_line_item($self, %params);
 
 514   _applicable_header_trade_agreement($self, %params);
 
 515   _applicable_header_trade_delivery($self, %params);
 
 516   _applicable_header_trade_settlement($self, %params);
 
 518   $params{xml}->endTag;
 
 519   #   </rsm:SupplyChainTradeTransaction>
 
 525   my $prefix = $::locale->text('The ZUGFeRD invoice data cannot be generated because the data validation failed.') . ' ';
 
 527   if (!$::instance_conf->get_co_ustid) {
 
 528     SL::X::ZUGFeRDValidation->throw(message => $prefix . $::locale->text('The VAT registration number is missing in the client configuration.'));
 
 531   if (!$::instance_conf->get_company || any { my $get = "get_address_$_"; !$::instance_conf->$get } qw(street1 zipcode city)) {
 
 532     SL::X::ZUGFeRDValidation->throw(message => $prefix . $::locale->text('The company\'s address information is incomplete in the client configuration.'));
 
 535   if ($::instance_conf->get_address_country && !SL::Helper::ISO3166::map_name_to_alpha_2_code($::instance_conf->get_address_country)) {
 
 536     SL::X::ZUGFeRDValidation->throw(message => $prefix . $::locale->text('The country from the company\'s address in the client configuration cannot be mapped to an ISO 3166-1 alpha 2 code.'));
 
 539   if ($self->customer->country && !SL::Helper::ISO3166::map_name_to_alpha_2_code($self->customer->country)) {
 
 540     SL::X::ZUGFeRDValidation->throw(message => $prefix . $::locale->text('The country from the customer\'s address cannot be mapped to an ISO 3166-1 alpha 2 code.'));
 
 543   if (!SL::Helper::ISO4217::map_currency_name_to_code($self->currency->name)) {
 
 544     SL::X::ZUGFeRDValidation->throw(message => $prefix . $::locale->text('The currency "#1" cannot be mapped to an ISO 4217 currency code.', $self->currency->name));
 
 547   my $failed_unit = first { !SL::Helper::UNECERecommendation20::map_name_to_code($_) } map { $_->unit } @{ $self->items };
 
 549     SL::X::ZUGFeRDValidation->throw(message => $prefix . $::locale->text('One of the units used (#1) cannot be mapped to a known unit code from the UN/ECE Recommendation 20 list.', $failed_unit));
 
 553 sub create_zugferd_data {
 
 556   _validate_data($self);
 
 558   my %ptc_data = $self->calculate_prices_and_taxes;
 
 560   my $xml      = XML::Writer->new(
 
 568     ptc_data => \%ptc_data,
 
 574   # <rsm:CrossIndustryInvoice>
 
 575   $xml->startTag("rsm:CrossIndustryInvoice",
 
 576                  "xmlns:a"   => "urn:un:unece:uncefact:data:standard:QualifiedDataType:100",
 
 577                  "xmlns:rsm" => "urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100",
 
 578                  "xmlns:qdt" => "urn:un:unece:uncefact:data:standard:QualifiedDataType:10",
 
 579                  "xmlns:ram" => "urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100",
 
 580                  "xmlns:xs"  => "http://www.w3.org/2001/XMLSchema",
 
 581                  "xmlns:udt" => "urn:un:unece:uncefact:data:standard:UnqualifiedDataType:100");
 
 583   _exchanged_document_context($self, %params);
 
 584   _exchanged_document($self, %params);
 
 585   _supply_chain_trade_transaction($self, %params);
 
 588   # </rsm:CrossIndustryInvoice>
 
 593 sub create_zugferd_xmp_data {
 
 597     conformance_level  => 'EXTENDED',
 
 598     document_file_name => 'ZUGFeRD-invoice.xml',
 
 599     document_type      => 'INVOICE',