Yesterday, Factur-X 1.08 a.k.a. ZUGFeRD 2.4 was published. The new feature is subitems with subtotals, but there are also many new examples, and the validation now requires a machine readable date when
the services were performed or the goods were delivered, plus empty, a.k.a.
NIL elements, are now deprecated.
Mustang was part of the toolchain (it e.g. generated the XSLT files for the release) and of course we have a preview but it will still takes some time to finalize a new Mustang release.
It turns out Mustang already produces ZUGFeRD 2.4 (try to prove the opposite). It’s unclear if anybody volunteers to add subinvoice lines, or at least correct the arithmetrical warnings their validation currently created, but December is usually a good month for open source projects, so a
service-date-checking nil-deprecating validation is in sight.
In the past two months since I last posted news on the google group the highlights were:
2025-09-12 I learned about SEMOX and VEFA , the first being a open source domain specific language, which overlaps in functionality with the proprietary Gefeg.fx tool, the latter being a validator directed at
validating a whole file format specification, rather than individual files.
2025-10-15 UstAnwendungserlass: The german VAT implementation law
recommending validation has been published in it final form.
2025-10-27 I learned of a new open source Python factur-x library
2025-10-10 pdplibre.org apparently collect information, may publish software, and
in the long term potentially even become a accredited platform (formerly called PDP), i.e.
a service provider in France whom you can use to transmit/receive messages.
I also learned that the REST API to transmit invoices is already AFNOR-standardized
AFNOR XP Z12-013 and that of the 117 APs/PDPs listed only around 7 actually passed certification, with the rest being resellers.
2025-11-10 There is a french open source Factur-X app, called the-gate.fr
2025-12-01 FacturXDocumentationParser is a open source project which publishes interactive Factur-X documentation
2025-12-04 Hanno Böck recently held a speech on e-invoice security, see also his github