German States
Germany XRechnung 3.x generator: UBL 2.1 + CII syntax, Leitweg-ID handling, B2G/B2B routing (ZRE / OZG-RE / Peppol)
Germany ZUGFeRD 2.x / Factur-X + XRechnung 3.x: CII XML builder profiles, Leitweg-ID, hybrid PDF/A-3 embedding, GoBD audit log
German ZUGFeRD 2.x hybrid PDF/A-3 generator: all conformance profiles (MINIMUM..EXTENDED + XRechnung), sealed & verified