ZugpferdXRechnung & ZUGFeRD for Ruby

Read, write and convert e-invoices (e-Rechnung) in UBL 2.1 and UN/CEFACT CII according to EN 16931

UBL 2.1 & CII

Full support for both EN 16931 syntaxes — read, write and roundtrip any XRechnung or ZUGFeRD document.

Dedicated classes for Invoice, Credit Note, Corrected Invoice, Self-billed Invoice, Partial Invoice and Prepayment Invoice.

Create ZUGFeRD / Factur-X hybrid invoices by embedding XML into PDF/A-3 via Ghostscript.

Validate invoices against EN 16931 and XRechnung business rules using Schematron. Optional Java dependency.

Supports XRechnung and ZUGFeRD profiles — read any compliant document and convert between UBL and CII.

Agnostic data model with BigDecimal amounts, Date fields, and plain Ruby objects.