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.
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 🙂