UNENO XRechnung viewer - mapping viz-2026-10-13

Mapping stylesheets (UBL Invoice, UBL CreditNote, CII -> EN 16931 fields): KoSIT xrechnung-visualization
  v2026-10-13 (XRechnung 3.0.2), Koordinierungsstelle fuer IT-Standards (KoSIT), Apache License 2.0
  (https://www.apache.org/licenses/LICENSE-2.0) - unchanged; compiled to SEF for SaxonJS.
  Source: https://github.com/itplr-kosit/xrechnung-visualization
The layout of the invoice is UNENO's own. SaxonJS 2.7 is loaded from the checker's rule set (see its NOTICE.txt).