README example generates invalid invoice

[hannob]

Currently, the invoice generation example in the README does not work, there's an open PR to fix it: #89

But even after applying that PR, the generated invoice does not appear to be compliant. Mustang shows a large list of errors:

[main] INFO com.helger.schematron.xslt.SchematronResourceXSLTCache - Compiling XSLT instance [cpPath=/xslt/ZF_233/FACTUR-X_EXTENDED.xslt; urlResolved=true; URL=jar:file:/tmp/Mustang-CLI-2.19.1.jar!/xslt/ZF_233/FACTUR-X_EXTENDED.xslt]
[main] INFO com.helger.schematron.api.xslt.AbstractSchematronXSLTBasedResource - Applying Schematron XSLT on XML instance
[main] INFO org.mustangproject.validator.XMLValidator - FailedAssert 
	[BR-FXEXT-CO-15]-If Invoice Total VAT amount (BT-110) ,where currency (BT-110-0) is equal to BT-5, is present, then the Absolute Value of (Invoice total amount with VAT (BT-112) - Invoice total amount without VAT (BT-109) - Invoice total VAT amount (BT-110)) <= 0,01 * (Number of line net amounts (BT-131) + Number of Document level allowance amounts (BT-92) + Number of Document level charges amounts (BT-99) + Number of Logistics Service fee amounts (BT-X-272). Else, Invoice total amount with VAT (BT-112) is equal to Invoice total amount without VAT (BT-109).
[main] ERROR org.mustangproject.validator.ZUGFeRDValidator - Error 4: 
	[BR-FXEXT-CO-15]-If Invoice Total VAT amount (BT-110) ,where currency (BT-110-0) is equal to BT-5, is present, then the Absolute Value of (Invoice total amount with VAT (BT-112) - Invoice total amount without VAT (BT-109) - Invoice total VAT amount (BT-110)) <= 0,01 * (Number of line net amounts (BT-131) + Number of Document level allowance amounts (BT-92) + Number of Document level charges amounts (BT-99) + Number of Logistics Service fee amounts (BT-X-272). Else, Invoice total amount with VAT (BT-112) is equal to Invoice total amount without VAT (BT-109). [ID FX-SCH-A-000307] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)
[main] INFO org.mustangproject.validator.XMLValidator - FailedAssert 
	[BR-FXEXT-AE-08]-In a VAT breakdown (BG-23) where VAT category code (BT-118) is equal to “AE” ("Reverse Charge"), Absolute Value of (VAT category taxable amount (BT-116) - ∑ Invoice line net amounts (BT-131) + Σ Document level allowance amounts (BT-92) - Σ Document level charge amounts (BT-99) - Σ Logistics Service fee amounts (BT-x-272)) <= 0,01 * ((Number of line net amounts (BT-131) + Number of Document level allowance amounts (BT-92) + Number of Document level charge amounts (BT-99) + Number of Logistics Service fee amounts (BT-X-272)), where the VAT category code (BT-151, BT-95, BT-102, BT-X-273) is "Reversed Charge" (AE).
[main] ERROR org.mustangproject.validator.ZUGFeRDValidator - Error 4: 
	[BR-FXEXT-AE-08]-In a VAT breakdown (BG-23) where VAT category code (BT-118) is equal to “AE” ("Reverse Charge"), Absolute Value of (VAT category taxable amount (BT-116) - ∑ Invoice line net amounts (BT-131) + Σ Document level allowance amounts (BT-92) - Σ Document level charge amounts (BT-99) - Σ Logistics Service fee amounts (BT-x-272)) <= 0,01 * ((Number of line net amounts (BT-131) + Number of Document level allowance amounts (BT-92) + Number of Document level charge amounts (BT-99) + Number of Logistics Service fee amounts (BT-X-272)), where the VAT category code (BT-151, BT-95, BT-102, BT-X-273) is "Reversed Charge" (AE). [ID FX-SCH-A-000308] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)
[main] INFO org.mustangproject.validator.XMLValidator - FailedAssert 
	[BR-CO-25]-In case the Amount due for payment (BT-115) is positive, either the Payment due date (BT-9) or the Payment terms (BT-20) shall be present.
[main] ERROR org.mustangproject.validator.ZUGFeRDValidator - Error 4: 
	[BR-CO-25]-In case the Amount due for payment (BT-115) is positive, either the Payment due date (BT-9) or the Payment terms (BT-20) shall be present. [ID FX-SCH-A-000155] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)
[main] INFO org.mustangproject.validator.XMLValidator - FailedAssert 
	[BR-10]-An Invoice shall contain the Buyer postal address (BG-8).
[main] ERROR org.mustangproject.validator.ZUGFeRDValidator - Error 4: 
	[BR-10]-An Invoice shall contain the Buyer postal address (BG-8). [ID FX-SCH-A-000156] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)
[main] INFO org.mustangproject.validator.XMLValidator - FailedAssert 
	[BR-11]-The Buyer postal address shall contain a Buyer country code (BT-55).
[main] ERROR org.mustangproject.validator.ZUGFeRDValidator - Error 4: 
	[BR-11]-The Buyer postal address shall contain a Buyer country code (BT-55). [ID FX-SCH-A-000157] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)
[main] INFO org.mustangproject.validator.XMLValidator - FailedAssert 
	[BR-E-01]-An Invoice that contains an Invoice line (BG-25), a Document level allowance (BG-20) or a Document level charge (BG-21) where the VAT category code (BT-151, BT-95 or BT-102) is “Exempt from VAT” shall contain exactly one VAT breakdown (BG-23) with the VAT category code (BT-118) equal to "Exempt from VAT".
[main] ERROR org.mustangproject.validator.ZUGFeRDValidator - Error 4: 
	[BR-E-01]-An Invoice that contains an Invoice line (BG-25), a Document level allowance (BG-20) or a Document level charge (BG-21) where the VAT category code (BT-151, BT-95 or BT-102) is “Exempt from VAT” shall contain exactly one VAT breakdown (BG-23) with the VAT category code (BT-118) equal to "Exempt from VAT". [ID FX-SCH-A-000256] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)
[main] INFO org.mustangproject.validator.XMLValidator - FailedAssert 
	[BR-AE-01]-An Invoice that contains an Invoice line (BG-25), a Document level allowance (BG-20) or a Document level charge (BG-21) where the VAT category code (BT-151, BT-95 or BT-102) is "Reverse charge" shall contain in the VAT breakdown (BG-23) exactly one VAT category code (BT-118) equal with "VAT reverse charge".
[main] ERROR org.mustangproject.validator.ZUGFeRDValidator - Error 4: 
	[BR-AE-01]-An Invoice that contains an Invoice line (BG-25), a Document level allowance (BG-20) or a Document level charge (BG-21) where the VAT category code (BT-151, BT-95 or BT-102) is "Reverse charge" shall contain in the VAT breakdown (BG-23) exactly one VAT category code (BT-118) equal with "VAT reverse charge". [ID FX-SCH-A-000257] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)
[main] INFO org.mustangproject.validator.XMLValidator - FailedAssert 
	Value of '@unitCode' is not allowed.
[main] ERROR org.mustangproject.validator.ZUGFeRDValidator - Error 4: 
	Value of '@unitCode' is not allowed. [ID FX-SCH-A-000275] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)
[main] INFO org.mustangproject.validator.XMLValidator - FailedAssert 
	Element 'ram:PostalTradeAddress' must occur exactly 1 times.
[main] ERROR org.mustangproject.validator.ZUGFeRDValidator - Error 4: 
	Element 'ram:PostalTradeAddress' must occur exactly 1 times. [ID FX-SCH-A-000032] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)
[main] INFO org.mustangproject.validator.XMLValidator - FailedAssert 
	Element 'ram:IssuerAssignedID' must occur exactly 1 times.
[main] ERROR org.mustangproject.validator.ZUGFeRDValidator - Error 4: 
	Element 'ram:IssuerAssignedID' must occur exactly 1 times. [ID FX-SCH-A-000029] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)
[main] INFO org.mustangproject.validator.XMLValidator - FailedAssert 
	Element 'ram:IssuerAssignedID' must occur exactly 1 times.
[main] ERROR org.mustangproject.validator.ZUGFeRDValidator - Error 4: 
	Element 'ram:IssuerAssignedID' must occur exactly 1 times. [ID FX-SCH-A-000029] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)
[main] INFO org.mustangproject.validator.XMLValidator - FailedAssert 
	Element 'ram:IssuerAssignedID' must occur exactly 1 times.
[main] ERROR org.mustangproject.validator.ZUGFeRDValidator - Error 4: 
	Element 'ram:IssuerAssignedID' must occur exactly 1 times. [ID FX-SCH-A-000029] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)
[main] WARN org.mustangproject.validator.ZUGFeRDValidator - Warning 10: Arithmetical issue:Payable total in XML is 999.00, but calculated total is 1.00 with tax basis 1.00 and with positions 1.00 = 1.00
[main] INFO org.mustangproject.validator.ZUGFeRDValidator - Parsed PDF:absent XML:invalid Signature:null Checksum:0D4BCAD997373799B42293F6CACBECDC9716CC6A Profile:urn:cen.eu:en16931:2017#conformant#urn:factur-x.eu:1p0:extended Version:2 Took:2554ms Errors:[4,4,4,4,4,4,4,4,4,4,4,4,10] ErrorIDs: [FX-SCH-A-000307,FX-SCH-A-000308,FX-SCH-A-000155,FX-SCH-A-000156,FX-SCH-A-000157,FX-SCH-A-000256,FX-SCH-A-000257,FX-SCH-A-000275,FX-SCH-A-000032,FX-SCH-A-000029,FX-SCH-A-000029,FX-SCH-A-000029]
<?xml version="1.0" encoding="UTF-8"?>

<validation filename="ex.xml" datetime="2025-10-29 10:49:25">
  <xml>
    <info>
      <version>2</version>
      <profile>urn:cen.eu:en16931:2017#conformant#urn:factur-x.eu:1p0:extended</profile>
      <validator version="2.19.1"/>
      <rules>
        <fired>71</fired>
        <failed>12</failed>
      </rules>
      <duration unit="ms">2449</duration>
    </info>
    <messages>
      <error type="4" location="/*:CrossIndustryInvoice[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]/*:SupplyChainTradeTransaction[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]/*:ApplicableHeaderTradeSettlement[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]/*:SpecifiedTradeSettlementHeaderMonetarySummation[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]" criterion="for $Currency in ../ram:InvoiceCurrencyCode, $BT109 in xs:decimal(ram:TaxBasisTotalAmount), $BT110 in xs:decimal(ram:TaxTotalAmount[@currencyID=$Currency]), $BT112 in xs:decimal(ram:GrandTotalAmount), $nbTaxTotalAmountInvoiceCurrency in count (ram:TaxTotalAmount[@currencyID=$Currency] ), $nbLineItems in xs:decimal(count(../../ram:IncludedSupplyChainTradeLineItem)), $nbAllowanceItems in xs:decimal(count(../ram:SpecifiedTradeAllowanceCharge[ram:ChargeIndicator/udt:Indicator='false'])), $nbChargeItems in xs:decimal(count(../ram:SpecifiedTradeAllowanceCharge[ram:ChargeIndicator/udt:Indicator='true']) + count(../ram:SpecifiedLogisticsServiceCharge)), $tolerance in xs:decimal(0.01), $maxTolerance in $tolerance * ($nbLineItems + $nbAllowanceItems + $nbChargeItems), $diff in xs:decimal($BT112 - $BT110 - $BT109), $abs in xs:decimal(abs($diff)) return ($abs le $maxTolerance and $nbTaxTotalAmountInvoiceCurrency eq 1) or ($BT109 eq $BT112 and $nbTaxTotalAmountInvoiceCurrency ne 1)">[BR-FXEXT-CO-15]-If Invoice Total VAT amount (BT-110) ,where currency (BT-110-0) is equal to BT-5, is present, then the Absolute Value of (Invoice total amount with VAT (BT-112) - Invoice total amount without VAT (BT-109) - Invoice total VAT amount (BT-110)) &lt;= 0,01 * (Number of line net amounts (BT-131) + Number of Document level allowance amounts (BT-92) + Number of Document level charges amounts (BT-99) + Number of Logistics Service fee amounts (BT-X-272). Else, Invoice total amount with VAT (BT-112) is equal to Invoice total amount without VAT (BT-109). [ID FX-SCH-A-000307] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)</error>  
      <error type="4" location="/*:CrossIndustryInvoice[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]/*:SupplyChainTradeTransaction[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]/*:ApplicableHeaderTradeSettlement[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]/*:ApplicableTradeTax[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]/*:CategoryCode[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]" criterion="for $basisAmount in xs:decimal(../ram:BasisAmount), $lineAmount in xs:decimal(round(sum(/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:IncludedSupplyChainTradeLineItem/ram:SpecifiedLineTradeSettlement[ram:ApplicableTradeTax/ram:CategoryCode = 'AE']/ram:SpecifiedTradeSettlementLineMonetarySummation/xs:decimal(ram:LineTotalAmount)) * 100) div 100), $chargeAmount in xs:decimal(round(sum(/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeSettlement/ram:SpecifiedTradeAllowanceCharge[ram:ChargeIndicator/udt:Indicator=true() and ram:CategoryTradeTax/ram:CategoryCode='AE']/xs:decimal(ram:ActualAmount)) * 100) div 100), $logisticChargeAmount in xs:decimal(round(sum(/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeSettlement/ram:SpecifiedLogisticsServiceCharge[ram:AppliedTradeTax/ram:CategoryCode='AE']/xs:decimal(ram:AppliedAmount)) * 100) div 100), $allowanceAmount in xs:decimal(round(sum(/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeSettlement/ram:SpecifiedTradeAllowanceCharge[ram:ChargeIndicator/udt:Indicator=false() and ram:CategoryTradeTax/ram:CategoryCode='AE']/xs:decimal(ram:ActualAmount)) * 100) div 100), $calculatedAmount in xs:decimal($lineAmount + $chargeAmount + $logisticChargeAmount - $allowanceAmount), $nbLineItems in xs:decimal(count(/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:IncludedSupplyChainTradeLineItem[ram:SpecifiedLineTradeSettlement/ram:ApplicableTradeTax/ram:CategoryCode = 'AE'])), $nbAllowancesOrCharges in xs:decimal(count(/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeSettlement/ram:SpecifiedTradeAllowanceCharge[ram:CategoryTradeTax/ram:CategoryCode='AE'])), $nbLogisticCharges in xs:decimal(count(/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeSettlement/ram:SpecifiedLogisticsServiceCharge[ram:AppliedTradeTax/ram:CategoryCode='AE'])), $tolerance in xs:decimal(0.01), $maxTolerance in $tolerance * ($nbLineItems + $nbAllowancesOrCharges + $nbLogisticCharges), $diff in xs:decimal($basisAmount - $calculatedAmount), $abs in xs:decimal(abs($diff)) return $abs le $maxTolerance">[BR-FXEXT-AE-08]-In a VAT breakdown (BG-23) where VAT category code (BT-118) is equal to “AE” ("Reverse Charge"), Absolute Value of (VAT category taxable amount (BT-116) - ∑ Invoice line net amounts (BT-131) + Σ Document level allowance amounts (BT-92) - Σ Document level charge amounts (BT-99) - Σ Logistics Service fee amounts (BT-x-272)) &lt;= 0,01 * ((Number of line net amounts (BT-131) + Number of Document level allowance amounts (BT-92) + Number of Document level charge amounts (BT-99) + Number of Logistics Service fee amounts (BT-X-272)), where the VAT category code (BT-151, BT-95, BT-102, BT-X-273) is "Reversed Charge" (AE). [ID FX-SCH-A-000308] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)</error>  
      <error type="4" location="/*:CrossIndustryInvoice[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]" criterion="(number(//ram:DuePayableAmount) &gt; 0 and ((//ram:SpecifiedTradePaymentTerms/ram:DueDateDateTime) or (//ram:SpecifiedTradePaymentTerms/ram:Description))) or not(number(//ram:DuePayableAmount) &gt; 0)">[BR-CO-25]-In case the Amount due for payment (BT-115) is positive, either the Payment due date (BT-9) or the Payment terms (BT-20) shall be present. [ID FX-SCH-A-000155] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)</error>  
      <error type="4" location="/*:CrossIndustryInvoice[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]" criterion="//ram:BuyerTradeParty/ram:PostalTradeAddress">[BR-10]-An Invoice shall contain the Buyer postal address (BG-8). [ID FX-SCH-A-000156] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)</error>  
      <error type="4" location="/*:CrossIndustryInvoice[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]" criterion="//ram:BuyerTradeParty/ram:PostalTradeAddress/ram:CountryID!=''">[BR-11]-The Buyer postal address shall contain a Buyer country code (BT-55). [ID FX-SCH-A-000157] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)</error>  
      <error type="4" location="/*:CrossIndustryInvoice[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]" criterion="(count(//ram:ApplicableHeaderTradeSettlement/ram:ApplicableTradeTax[ram:CategoryCode='E'])=0 and count(//ram:SpecifiedLineTradeSettlement/ram:ApplicableTradeTax[ram:CategoryCode='E'])=0 and count(//ram:CategoryTradeTax[ram:CategoryCode='E'])=0) or ( count(//ram:ApplicableHeaderTradeSettlement/ram:ApplicableTradeTax[ram:CategoryCode='E'])=1 and (exists(//ram:SpecifiedLineTradeSettlement/ram:ApplicableTradeTax[ram:CategoryCode='E']) or exists(//ram:CategoryTradeTax[ram:CategoryCode='E'])))">[BR-E-01]-An Invoice that contains an Invoice line (BG-25), a Document level allowance (BG-20) or a Document level charge (BG-21) where the VAT category code (BT-151, BT-95 or BT-102) is “Exempt from VAT” shall contain exactly one VAT breakdown (BG-23) with the VAT category code (BT-118) equal to "Exempt from VAT". [ID FX-SCH-A-000256] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)</error>  
      <error type="4" location="/*:CrossIndustryInvoice[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]" criterion="(count(//ram:ApplicableHeaderTradeSettlement/ram:ApplicableTradeTax[ram:CategoryCode='AE'])=0 and count(//ram:SpecifiedLineTradeSettlement/ram:ApplicableTradeTax[ram:CategoryCode='AE'])=0 and count(//ram:CategoryTradeTax[ram:CategoryCode='AE'])=0) or ( count(//ram:ApplicableHeaderTradeSettlement/ram:ApplicableTradeTax[ram:CategoryCode='AE'])=1 and (exists(//ram:SpecifiedLineTradeSettlement/ram:ApplicableTradeTax[ram:CategoryCode='AE']) or exists(//ram:CategoryTradeTax[ram:CategoryCode='AE'])))">[BR-AE-01]-An Invoice that contains an Invoice line (BG-25), a Document level allowance (BG-20) or a Document level charge (BG-21) where the VAT category code (BT-151, BT-95 or BT-102) is "Reverse charge" shall contain in the VAT breakdown (BG-23) exactly one VAT category code (BT-118) equal with "VAT reverse charge". [ID FX-SCH-A-000257] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)</error>  
      <error type="4" location="/*:CrossIndustryInvoice[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]/*:SupplyChainTradeTransaction[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]/*:IncludedSupplyChainTradeLineItem[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]/*:SpecifiedLineTradeAgreement[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]/*:NetPriceProductTradePrice[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]/*:BasisQuantity[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]" criterion="string-length($codeValue11)=0 or document('FACTUR-X_EXTENDED_codedb.xml')/codedb/cl[@id=11]/enumeration[@value=$codeValue11]">Value of '@unitCode' is not allowed. [ID FX-SCH-A-000275] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)</error>  
      <error type="4" location="/*:CrossIndustryInvoice[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]/*:SupplyChainTradeTransaction[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]/*:ApplicableHeaderTradeAgreement[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]/*:BuyerTradeParty[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]" criterion="count(ram:PostalTradeAddress)=1">Element 'ram:PostalTradeAddress' must occur exactly 1 times. [ID FX-SCH-A-000032] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)</error>  
      <error type="4" location="/*:CrossIndustryInvoice[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]/*:SupplyChainTradeTransaction[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]/*:ApplicableHeaderTradeAgreement[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]/*:SellerOrderReferencedDocument[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]" criterion="count(ram:IssuerAssignedID)=1">Element 'ram:IssuerAssignedID' must occur exactly 1 times. [ID FX-SCH-A-000029] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)</error>  
      <error type="4" location="/*:CrossIndustryInvoice[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]/*:SupplyChainTradeTransaction[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]/*:ApplicableHeaderTradeAgreement[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]/*:BuyerOrderReferencedDocument[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]" criterion="count(ram:IssuerAssignedID)=1">Element 'ram:IssuerAssignedID' must occur exactly 1 times. [ID FX-SCH-A-000029] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)</error>  
      <error type="4" location="/*:CrossIndustryInvoice[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]/*:SupplyChainTradeTransaction[namespace-uri()='urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100'][1]/*:ApplicableHeaderTradeAgreement[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]/*:UltimateCustomerOrderReferencedDocument[namespace-uri()='urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100'][1]" criterion="count(ram:IssuerAssignedID)=1">Element 'ram:IssuerAssignedID' must occur exactly 1 times. [ID FX-SCH-A-000029] from /xslt/ZF_233/FACTUR-X_EXTENDED.xslt)</error>  
      <warning type="10">Arithmetical issue:Payable total in XML is 999.00, but calculated total is 1.00 with tax basis 1.00 and with positions 1.00 = 1.00</warning> 
    </messages>
    <summary status="invalid"/>
  </xml>
  <messages></messages>
  <summary status="invalid"/>
</validation>

[kuhntob]

Hi @hannob, do you think the example really needs to pass the mustang validation? I used the sample as a starting point and adjusted the structure to match our invoice format. From there, I fixed one validation error after another.

[hannob]

I tried to do that, and found it difficult to parse some of the errors generated by the validation and understand what they're trying to tell me.. I think a working example to create an EN16931 compliant invoice would be very helpful. Whether in the README or somewhere else.