OpenBooks
Licensed under the GNU Affero General Public License, version 3 or later.
See LICENSE for the full licence text.

The native e-invoicing implementation in engine/src/einvoice contains adaptations
of OpenConstructionERP e-invoicing code:
  https://github.com/datadrivenconstruction/OpenConstructionERP
  Copyright (c) 2026 Artem Boiko / DataDrivenConstruction
  Licensed under AGPL-3.0-or-later.
  Reviewed source revision: 3517fc53b105efea92458971d427693b880fcab8.

The CII D16B and UBL 2.1 schemas retain their original UN/CEFACT, OASIS and
signature-schema copyright and permission notices. Published EN 16931 code
lists are derived from the EUPL-1.2 validation artefacts. The EUPL licence is
included under engine/src/einvoice/standards/EUPL-1.2.txt.

The sRGB ICC colour profile is Copyright International Color Consortium, 2015,
and is distributed under the ICC profile-library terms. Its original copyright
tag is retained.

Sources, versions, digests and validation boundaries are documented in
engine/src/einvoice/standards/README.md.