Mustang 2.3.3

Mustang 2.3.3 was released on Tuesday, December 21st 2021 and updated it’s logback library from version 1.2.3 to 1.2.9.
Version 2021-12-13 and 2021-12-20 of did not issue any warning so far but Github’s Dependabot recommended a version > 1.2.7 in conjunction with Log4j.

Mustang 2.3.2

Mustang 2.3.2 was released on Thursday, December 16th 2021. Apart from the fact that the invoice class can now be persisted e.g. using Jackson, whitespace removal has been reconfigured to leave newlines in place, which may be required for XRechnung’s cash discount and other small fixed detailled in the projects

Please note that Mustang was not affected by log4j CVE-2021-44228 or CVE-2021-45046.

Germany prepares for B2B-e-invoice obligation

Frankfurt am Main, 2021-12-06

In their coalition agreement the new german government apparently agreed on a
federal reporting system on VAT which will be used for the creation, validation and forwarding of invoices
“ein elektronisches Meldesystem bundesweit einheitlich einführen, das für die Erstellung, Prüfung und Weiterleitung von Rechnungen verwendet wird”.

After Italy introducing mandatory business-to-business e-invoices in 2019 and France set to do so in 2026 (source when this was still planned for 2025) this agreement, together with other documents like a (realtively independent) (german) study, a (german) complaint by the Federal Audit Office, a (german) investigation by the research service of the Bundestag as well as a (german) request by the political liberal party, make it look as if these were preparations to introduce an obligation for e-invoices in Germany as well.

Jochen Stärk

Mustang 2.3.1

Mustang 2.3.1 was released on Monday, October 25th 2021, and features an improved and features the document type PARTIAL_BILLING, invoiceReferencedIssueDate, as well as specifiedProcuringProject. It’s now also possible to add multiple referenced documents per line item and the importer has been improved and can now e.g. also act on XML input, not only PDF.

Mustang 2.3.0

XRechnung 2.1.1 validation is now possible and a PDF issue has been fixed.

Despite it’s only a minor feature this version is also called 2.3.0 to indicate that the changed (internal) PDF upgrade is also a good opportunity to confirm the output PDF/A validity of at least some random samples 🙂

Screenshot of Quba 0.1

E-Invoice-Viewer Quba 0.1

Some people from the Mustangproject are also involved in the open-source electron based e-invoice viewer “Quba” which released it’s first preview version (“0.1”) today, starting with UN/CEFACT CII support in a version for windows. The announcement has more details and of course the home page has a download button since today.

Mustang 2.1.1

Mustang 2.1.1 fixes

  • recipient contacts in XRechnung
  • remove outdated dependency
  • allow XRechnung without street
  • only deploy library and validator to maven central, not core nor cli
  • a correction should reference the original invoice via invoiceReferencedDocument, not buyerOrderReferencedDocument
  • upgraded CEN Schematron validation (codes 24) to v1.3.4
  • added unit tests for ubl conversion and visualization
  • and adds the possibility to specify a seller order referenced document


Mustang 2.1.0

Mustang 2.1.0 was released on 2021-01-19 and contains

  • The possibility to convert from CII to UBL (thanks to this library)
  • XRechnung now exports as 2.0 (in Mustang 2.0.3 this was automatically switched on 2021-01-01)

Additionally, it

  • fixed a charge/allowance rounding error #212
  • corrected intra community supply tax exemption category code
  • removed Tradeparty.getZip in favor of getZIP (as it’s also setZIP)