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peppol-bis-billing-validator

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Introduction

peppol-bis-billing-validator is a small service for validating XML against the official Peppol BIS Billing 3.0 schematron rules. It exposes a validation endpoint which takes the to be validated XML and returns the schematron report. The HTTP status code indicates if the provided XML is valid (200) or has issues (400).

Usage

This service was mainly designed with containerization in mind. So general idea is to use the following docker image and make HTTP-Requests from the main application to the service for validation.

  • modifying / creating docker-compose.yaml

The service exposes a health endpoint which can be used to check if the service ready to be used

You can find a OpenAPI documentation after you started the service at /swagger

  peppol-validator:
    image: 'easybill/peppol-bis-billing-validator:latest'
    ports:
      - '8081:8080'
    environment:
        JAVA_TOOL_OPTIONS: -Xmx512m
    healthcheck:
      test: curl --fail http://localhost:8081/health || exit 0
      interval: 10s
      retries: 6
  • starting docker compose
docker compose up --detach --wait --wait-timeout 30
  • Example of using this service (PHP)
<?php

declare(strict_types=1);

final class PeppolValidator
{
    public function isValid(string $xml): ?bool
    {
        $httpClient = new Client();

        $response = $httpClient->request('POST', 'http://localhost:8081/validation', [
            RequestOptions::HEADERS => [
                'Content-Type' => 'application/xml',
            ],
            RequestOptions::BODY => $xml,
            RequestOptions::TIMEOUT => 10,
            RequestOptions::CONNECT_TIMEOUT => 10,
            RequestOptions::HTTP_ERRORS => false,
        ]);

        return 200 === $response->getStatusCode();
    }
}
  • Example response in case the XML is invalid

The svrl:failed-assert elements are relevant to be inspected. They contain the error message.

<?xml version="1.0" encoding="UTF-8"?>
<svrl:schematron-output xmlns:svrl="http://purl.oclc.org/dsdl/svrl" title="Rules for Peppol BIS 3.0 Billing" schemaVersion="iso">
    <svrl:ns-prefix-in-attribute-values prefix="cbc" uri="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2" />
    <svrl:ns-prefix-in-attribute-values prefix="cac" uri="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2" />
    <svrl:ns-prefix-in-attribute-values prefix="ubl-creditnote" uri="urn:oasis:names:specification:ubl:schema:xsd:CreditNote-2" />
    <svrl:ns-prefix-in-attribute-values prefix="ubl-invoice" uri="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2" />
    <svrl:ns-prefix-in-attribute-values prefix="xs" uri="http://www.w3.org/2001/XMLSchema" />
    <svrl:ns-prefix-in-attribute-values prefix="u" uri="utils" />
    <svrl:active-pattern document="" />
    <svrl:active-pattern document="" />
    <svrl:active-pattern document="" />
    <svrl:fired-rule context="ubl-creditnote:CreditNote | ubl-invoice:Invoice" />
    <svrl:failed-assert id="PEPPOL-EN16931-R007" location="/*:Invoice[namespace-uri()='urn:oasis:names:specification:ubl:schema:xsd:Invoice-2'][1]" test="$profile != 'Unknown'" flag="fatal">
        <svrl:text>Business process MUST be in the format 'urn:fdc:peppol.eu:2017:poacc:billing:NN:1.0' where NN indicates the process number.</svrl:text>
    </svrl:failed-assert>
    <svrl:fired-rule context="cac:AccountingSupplierParty/cac:Party" />
    <svrl:fired-rule context="cbc:EndpointID[@schemeID = '0088'] | cac:PartyIdentification/cbc:ID[@schemeID = '0088'] | cbc:CompanyID[@schemeID = '0088']" />
    <svrl:fired-rule context="cac:AccountingCustomerParty/cac:Party" />
    <svrl:fired-rule context="cbc:EndpointID[@schemeID = '0184'] | cac:PartyIdentification/cbc:ID[@schemeID = '0184'] | cbc:CompanyID[@schemeID = '0184']" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cac:TaxTotal[cac:TaxSubtotal]/cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cac:TaxTotal[cac:TaxSubtotal]/cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cac:TaxTotal[cac:TaxSubtotal]/cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cac:TaxTotal[cac:TaxSubtotal]/cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cac:TaxTotal[cac:TaxSubtotal]/cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cac:TaxTotal[cac:TaxSubtotal]/cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:fired-rule context="cac:InvoiceLine | cac:CreditNoteLine" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cac:TaxTotal[cac:TaxSubtotal]/cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cac:TaxTotal[cac:TaxSubtotal]/cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:active-pattern document="" />
    <svrl:active-pattern document="" />
    <svrl:active-pattern document="" />
    <svrl:active-pattern document="" />
    <svrl:active-pattern document="" />
    <svrl:active-pattern document="" />
    <svrl:active-pattern document="" />
    <svrl:active-pattern document="" />
    <svrl:active-pattern document="" />
    <svrl:fired-rule context="cbc:IssueDate | cbc:DueDate | cbc:TaxPointDate | cbc:StartDate | cbc:EndDate | cbc:ActualDeliveryDate" />
    <svrl:fired-rule context="cbc:InvoiceTypeCode" />
    <svrl:fired-rule context="cbc:EndpointID[@schemeID]" />
    <svrl:fired-rule context="cbc:EndpointID[@schemeID]" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:fired-rule context="cac:TaxCategory[upper-case(cbc:TaxExemptionReasonCode)='VATEX-EU-F']" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
    <svrl:fired-rule context="cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount" />
</svrl:schematron-output>

Issues & Contribution

Feel free to create pull-requests or issues if you have trouble with this service or any related resources.