Waterschap Brabantse Delta · R&D lab · licence

EUPL-1.2 — the licence our open source is published under

licensor Waterschap Brabantse Delta (R&D) SPDX EUPL-1.2 text verified 2026-09-08 version 1.0 final
R&D software that we open up is released under the European Union Public Licence v1.2 — the open source licence written and adopted by the European Commission itself. It is a copyleft licence: anyone may use, study, change and redistribute the work for any purpose, commercial use included, as long as they pass the same freedoms on and keep the source available. This page carries the full licence text in Dutch and English, checked character-for-character against the Official Journal of the European Union.

Where this applies

Every R&D repository we open carries the same licence, the same licence file and the same identifier. The file is byte-identical in all four — SHA-256 5f6be11b…7efa1b92 once line endings are normalised — and it is the Dutch official version reproduced in section 5.

The repositories under EUPL-1.2, with the file that carries the licence text. The licensor is named in each repository's NOTICE; EVOLV states it in its README.
RepositoryWhat it isLicence file
RnD/EVOLVNode-RED palette for wastewater treatment plant automation (ISA-88)LICENSE
RnD/RESOLVThe application shell that hosts the modules over their public contractsLICENSES/EUPL-1.2.txt
RnD/flowioFramework-free core for drag-and-drop schematic editors (process, electrical, network)LICENSES/EUPL-1.2.txt
RnD/elecIOThe electrical engines: shape language, networks and phases, checks, wire routing, panel layout, terminal listsLICENSES/EUPL-1.2.txt

Third-party code bundled anywhere in these repositories keeps its own terms and its own notices — Article 5 requires exactly that, and combining it is what the compatibility list in section 4 is for.

What the licence grants, asks and withholds

This is a plain reading of the text, with the article each point comes from. It is a reader's map, not a substitute: only the licence text in section 5 has legal effect, and nothing here is legal advice.

You may

  • Use the work in any circumstance and for any purpose — including commercially. art. 2
  • Reproduce it, modify it, and build derivative works on it. art. 2
  • Distribute, communicate, lend, rent and sublicense it, worldwide and royalty-free. art. 2
  • Use any patents the licensor holds, as far as needed to exercise those rights. art. 2

Provided you

  • Keep every copyright, patent, trademark and disclaimer notice intact. art. 5
  • Ship a copy of the licence and those notices with every copy you pass on. art. 5
  • State prominently that you modified the work, and on what date. art. 5
  • Release your derivative work under this licence or a compatible one. art. 5
  • Provide the source code, or point to a repository where it is freely available. art. 3, 5

But note

  • The work is provided "as is": no warranty of any kind. art. 7
  • No liability, except for wilful misconduct, damage to natural persons, and statutory product liability. art. 8
  • No permission to use our names or trademarks beyond describing the work's origin. art. 5
  • Your licence ends automatically the moment you breach it — but not the licence of anyone who received the work from you and stays compliant. art. 12
  • Our licensor is seated in the Netherlands, so Dutch law governs and the competent Dutch court has jurisdiction. art. 14, 15

Reusing our code: the five things you actually have to do

The duties below start the moment you distribute or communicate the work — and the licence defines that broadly. Article 1 counts "providing access to its essential functionalities" as communication, so publishing a service built on this code triggers the same obligations as handing someone a copy. Using it privately, inside your own organisation, triggers none of them.

  1. Keep the notices art. 5 — attribution right

    Copyright, patent and trademark notices, and anything referring to the licence or the disclaimer of warranties, stay exactly as they are.

  2. Include the licence art. 5

    Every copy you distribute or communicate carries a copy of the licence and of those notices.

  3. Mark your changes art. 5

    A derivative work must carry prominent notices saying the work was modified, and the date of modification.

  4. Pass the licence on art. 5 — copyleft and compatibility

    Your distribution happens under this licence or a later EUPL version. If you combine our work with a work under one of the compatible licences in the Appendix, the combined result may go out under that licence instead — and where the two conflict, the compatible licence prevails.

  5. Make the source available art. 3 and 5

    Ship a machine-readable copy of the source, or name a repository where it is easily and freely available for as long as you keep distributing. Distributing by electronic means adds Article 11: the channel must tell the public who the licensor is, what the licence is, and how it can be accessed.

The notice the Commission recommends

The licence takes effect when the licensor places the words Licensed under the EUPL immediately after the copyright notice. This is the header form the European Commission publishes for source files:

Copyright (c) 2026 René de Ren / Waterschap Brabantse Delta (WBD R&D)

Licensed under the EUPL, Version 1.2 or - as soon as they will be approved by
the European Commission - subsequent versions of the EUPL (the "Licence");
You may not use this work except in compliance with the Licence.
You may obtain a copy of the Licence at:

    https://joinup.ec.europa.eu/software/page/eupl

Unless required by applicable law or agreed to in writing, software distributed
under the Licence is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR
CONDITIONS OF ANY KIND, either express or implied. See the Licence for the
specific language governing permissions and limitations under the Licence.

Our repositories declare the plain identifier EUPL-1.2 without an "only" restriction, so the Article 5 default applies: a reuser may also distribute under a later EUPL version.

Compatible licences — what the Appendix is for

Strict copyleft licences usually cannot be combined: each demands that the whole result carry its terms. The EUPL solves this from its own side. If you merge our work with a work under one of the licences below, you may release the combined derivative work under that other licence — the EUPL steps aside rather than deadlocking (Article 5, compatibility clause). The list is the licence's own Appendix, reproduced in full in section 5.

The compatible licences named in the EUPL-1.2 Appendix, with the versions the Appendix admits. The Commission may add later versions of these same licences without a new EUPL version; anything else needs one.
LicenceAdmitted versions
GNU General Public License (GPL)v2, v3
GNU Affero General Public License (AGPL)v3
GNU Lesser General Public Licence (LGPL)v2.1, v3
Open Software License (OSL)v2.1, v3.0
Eclipse Public License (EPL)v1.0
Mozilla Public Licence (MPL)v2
CeCILLv2.0, v2.1
Creative Commons Attribution-ShareAlike (CC BY-SA)v3.0 Unported — for works other than software
European Union Public Licence (EUPL)v1.1, v1.2
Québec Free and Open-Source Licence (LiLiQ)Reciprocity (LiLiQ-R), Strong Reciprocity (LiLiQ-R+)

The licence text

Reproduced in full. The Dutch and English versions are both official publications of the European Union and, per Article 13, carry identical legal value — read whichever you prefer. Both were parsed from the Commission's own PDFs and checked against a second independent copy; see the provenance at the foot of this page.

European Union Public Licence v. 1.2

EUROPEAN UNION PUBLIC LICENCE v. 1.2

EUPL © the European Union 2007, 2016

This European Union Public Licence (the ‘EUPL’) applies to the Work (as defined below) which is provided under the terms of this Licence. Any use of the Work, other than as authorised under this Licence is prohibited (to the extent such use is covered by a right of the copyright holder of the Work).

The Work is provided under the terms of this Licence when the Licensor (as defined below) has placed the following notice immediately following the copyright notice for the Work:

Licensed under the EUPL

or has expressed by any other means his willingness to license under the EUPL.

1Definitions

In this Licence, the following terms have the following meaning:

  • ‘The Licence’: this Licence.
  • ‘The Original Work’: the work or software distributed or communicated by the Licensor under this Licence, available as Source Code and also as Executable Code as the case may be.
  • ‘Derivative Works’: the works or software that could be created by the Licensee, based upon the Original Work or modifications thereof. This Licence does not define the extent of modification or dependence on the Original Work required in order to classify a work as a Derivative Work; this extent is determined by copyright law applicable in the country mentioned in Article 15.
  • ‘The Work’: the Original Work or its Derivative Works.
  • ‘The Source Code’: the human-readable form of the Work which is the most convenient for people to study and modify.
  • ‘The Executable Code’: any code which has generally been compiled and which is meant to be interpreted by a computer as a program.
  • ‘The Licensor’: the natural or legal person that distributes or communicates the Work under the Licence.
  • ‘Contributor(s)’: any natural or legal person who modifies the Work under the Licence, or otherwise contributes to the creation of a Derivative Work.
  • ‘The Licensee’ or ‘You’: any natural or legal person who makes any usage of the Work under the terms of the Licence.
  • ‘Distribution’ or ‘Communication’: any act of selling, giving, lending, renting, distributing, communicating, transmitting, or otherwise making available, online or offline, copies of the Work or providing access to its essential functionalities at the disposal of any other natural or legal person.

2Scope of the rights granted by the Licence

The Licensor hereby grants You a worldwide, royalty-free, non-exclusive, sublicensable licence to do the following, for the duration of copyright vested in the Original Work:

  • use the Work in any circumstance and for all usage,
  • reproduce the Work,
  • modify the Work, and make Derivative Works based upon the Work,
  • communicate to the public, including the right to make available or display the Work or copies thereof to the public and perform publicly, as the case may be, the Work,
  • distribute the Work or copies thereof,
  • lend and rent the Work or copies thereof,
  • sublicense rights in the Work or copies thereof.

Those rights can be exercised on any media, supports and formats, whether now known or later invented, as far as the applicable law permits so.

In the countries where moral rights apply, the Licensor waives his right to exercise his moral right to the extent allowed by law in order to make effective the licence of the economic rights here above listed.

The Licensor grants to the Licensee royalty-free, non-exclusive usage rights to any patents held by the Licensor, to the extent necessary to make use of the rights granted on the Work under this Licence.

3Communication of the Source Code

The Licensor may provide the Work either in its Source Code form, or as Executable Code. If the Work is provided as Executable Code, the Licensor provides in addition a machine-readable copy of the Source Code of the Work along with each copy of the Work that the Licensor distributes or indicates, in a notice following the copyright notice attached to the Work, a repository where the Source Code is easily and freely accessible for as long as the Licensor continues to distribute or communicate the Work.

4Limitations on copyright

Nothing in this Licence is intended to deprive the Licensee of the benefits from any exception or limitation to the exclusive rights of the rights owners in the Work, of the exhaustion of those rights or of other applicable limitations thereto.

5Obligations of the Licensee

The grant of the rights mentioned above is subject to some restrictions and obligations imposed on the Licensee. Those obligations are the following:

Attribution right: The Licensee shall keep intact all copyright, patent or trademarks notices and all notices that refer to the Licence and to the disclaimer of warranties. The Licensee must include a copy of such notices and a copy of the Licence with every copy of the Work he/she distributes or communicates. The Licensee must cause any Derivative Work to carry prominent notices stating that the Work has been modified and the date of modification.

Copyleft clause: If the Licensee distributes or communicates copies of the Original Works or Derivative Works, this Distribution or Communication will be done under the terms of this Licence or of a later version of this Licence unless the Original Work is expressly distributed only under this version of the Licence — for example by communicating ‘EUPL v. 1.2 only’. The Licensee (becoming Licensor) cannot offer or impose any additional terms or conditions on the Work or Derivative Work that alter or restrict the terms of the Licence.

Compatibility clause: If the Licensee Distributes or Communicates Derivative Works or copies thereof based upon both the Work and another work licensed under a Compatible Licence, this Distribution or Communication can be done under the terms of this Compatible Licence. For the sake of this clause, ‘Compatible Licence’ refers to the licences listed in the appendix attached to this Licence. Should the Licensee's obligations under the Compatible Licence conflict with his/her obligations under this Licence, the obligations of the Compatible Licence shall prevail.

Provision of Source Code: When distributing or communicating copies of the Work, the Licensee will provide a machine-readable copy of the Source Code or indicate a repository where this Source will be easily and freely available for as long as the Licensee continues to distribute or communicate the Work.

Legal Protection: This Licence does not grant permission to use the trade names, trademarks, service marks, or names of the Licensor, except as required for reasonable and customary use in describing the origin of the Work and reproducing the content of the copyright notice.

6Chain of Authorship

The original Licensor warrants that the copyright in the Original Work granted hereunder is owned by him/her or licensed to him/her and that he/she has the power and authority to grant the Licence.

Each Contributor warrants that the copyright in the modifications he/she brings to the Work are owned by him/her or licensed to him/her and that he/she has the power and authority to grant the Licence.

Each time You accept the Licence, the original Licensor and subsequent Contributors grant You a licence to their contributions to the Work, under the terms of this Licence.

7Disclaimer of Warranty

The Work is a work in progress, which is continuously improved by numerous Contributors. It is not a finished work and may therefore contain defects or ‘bugs’ inherent to this type of development.

For the above reason, the Work is provided under the Licence on an ‘as is’ basis and without warranties of any kind concerning the Work, including without limitation merchantability, fitness for a particular purpose, absence of defects or errors, accuracy, non-infringement of intellectual property rights other than copyright as stated in Article 6 of this Licence.

This disclaimer of warranty is an essential part of the Licence and a condition for the grant of any rights to the Work.

8Disclaimer of Liability

Except in the cases of wilful misconduct or damages directly caused to natural persons, the Licensor will in no event be liable for any direct or indirect, material or moral, damages of any kind, arising out of the Licence or of the use of the Work, including without limitation, damages for loss of goodwill, work stoppage, computer failure or malfunction, loss of data or any commercial damage, even if the Licensor has been advised of the possibility of such damage. However, the Licensor will be liable under statutory product liability laws as far such laws apply to the Work.

9Additional agreements

While distributing the Work, You may choose to conclude an additional agreement, defining obligations or services consistent with this Licence. However, if accepting obligations, You may act only on your own behalf and on your sole responsibility, not on behalf of the original Licensor or any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against such Contributor by the fact You have accepted any warranty or additional liability.

10Acceptance of the Licence

The provisions of this Licence can be accepted by clicking on an icon ‘I agree’ placed under the bottom of a window displaying the text of this Licence or by affirming consent in any other similar way, in accordance with the rules of applicable law. Clicking on that icon indicates your clear and irrevocable acceptance of this Licence and all of its terms and conditions.

Similarly, you irrevocably accept this Licence and all of its terms and conditions by exercising any rights granted to You by Article 2 of this Licence, such as the use of the Work, the creation by You of a Derivative Work or the Distribution or Communication by You of the Work or copies thereof.

11Information to the public

In case of any Distribution or Communication of the Work by means of electronic communication by You (for example, by offering to download the Work from a remote location) the distribution channel or media (for example, a website) must at least provide to the public the information requested by the applicable law regarding the Licensor, the Licence and the way it may be accessible, concluded, stored and reproduced by the Licensee.

12Termination of the Licence

The Licence and the rights granted hereunder will terminate automatically upon any breach by the Licensee of the terms of the Licence.

Such a termination will not terminate the licences of any person who has received the Work from the Licensee under the Licence, provided such persons remain in full compliance with the Licence.

13Miscellaneous

Without prejudice of Article 9 above, the Licence represents the complete agreement between the Parties as to the Work.

If any provision of the Licence is invalid or unenforceable under applicable law, this will not affect the validity or enforceability of the Licence as a whole. Such provision will be construed or reformed so as necessary to make it valid and enforceable.

The European Commission may publish other linguistic versions or new versions of this Licence or updated versions of the Appendix, so far this is required and reasonable, without reducing the scope of the rights granted by the Licence. New versions of the Licence will be published with a unique version number.

All linguistic versions of this Licence, approved by the European Commission, have identical value. Parties can take advantage of the linguistic version of their choice.

14Jurisdiction

Without prejudice to specific agreement between parties,

  • any litigation resulting from the interpretation of this License, arising between the European Union institutions, bodies, offices or agencies, as a Licensor, and any Licensee, will be subject to the jurisdiction of the Court of Justice of the European Union, as laid down in article 272 of the Treaty on the Functioning of the European Union,
  • any litigation arising between other parties and resulting from the interpretation of this License, will be subject to the exclusive jurisdiction of the competent court where the Licensor resides or conducts its primary business.

15Applicable Law

Without prejudice to specific agreement between parties,

  • this Licence shall be governed by the law of the European Union Member State where the Licensor has his seat, resides or has his registered office,
  • this licence shall be governed by Belgian law if the Licensor has no seat, residence or registered office inside a European Union Member State.

Appendix

‘Compatible Licences’ according to Article 5 EUPL are:

  • GNU General Public License (GPL) v. 2, v. 3
  • GNU Affero General Public License (AGPL) v. 3
  • Open Software License (OSL) v. 2.1, v. 3.0
  • Eclipse Public License (EPL) v. 1.0
  • CeCILL v. 2.0, v. 2.1
  • Mozilla Public Licence (MPL) v. 2
  • GNU Lesser General Public Licence (LGPL) v. 2.1, v. 3
  • Creative Commons Attribution-ShareAlike v. 3.0 Unported (CC BY-SA 3.0) for works other than software
  • European Union Public Licence (EUPL) v. 1.1, v. 1.2
  • Québec Free and Open-Source Licence — Reciprocity (LiLiQ-R) or Strong Reciprocity (LiLiQ-R+)
  • The European Commission may update this Appendix to later versions of the above licences without producing a new version of the EUPL, as long as they provide the rights granted in Article 2 of this Licence and protect the covered Source Code from exclusive appropriation.
  • All other changes or additions to this Appendix require the production of a new EUPL version.

Sources

  1. Commission Implementing Decision (EU) 2017/863 of 18 May 2017, Annex — EUPL v1.2. Official Journal of the European Union, L 128, 19.5.2017, p. 59. Retrieved as the Commission's own PDFs from the Interoperable Europe portal on 2026-09-08. eupl_v1.2_nl.pdf · sha256 ba823ee8…a741500
    eupl_v1.2_en.pdf · sha256 31a1874a…f05bd4e3
  2. European Commission — EUPL text v1.2, Interoperable Europe portal. Publishes the licence in 23 official EU languages. interoperable-europe.ec.europa.eu/collection/eupl/eupl-text-eupl-12 · read 2026-09-08
  3. Open Source Initiative — EUPL-1.2 licence record; approved 13 July 2017. opensource.org/license/eupl-1-2 · read 2026-09-08
  4. SPDX License List — canonical English text for identifier EUPL-1.2, used as the second independent copy in the check. spdx/license-list-data, text/EUPL-1.2.txt · read 2026-09-08
  5. WBD R&D repositories — LICENSES/EUPL-1.2.txt and NOTICE in RnD/RESOLV, RnD/flowio and RnD/elecIO; the licensor is named in each NOTICE. LICENSES/EUPL-1.2.txt · sha256 5f6be11b…7efa1b92 · identical in all three
LicenceEUPL-1.2 (SPDX). Dutch and English official versions, equal in value per Article 13.
LicensorAs stated verbatim in the NOTICE of each repository: "Rechthebbende: René de Ren / Waterschap Brabantse Delta (WBD R&D)."
VerificationBoth texts were extracted from the Commission's PDFs by page geometry, then compared — ignoring whitespace — against a second copy: the Dutch against LICENSES/EUPL-1.2.txt as shipped in our repositories, the English against the SPDX list text. Each matched to a single character.
The one characterBoth reference copies carry a stray full stop after "(LiLiQ-R+)" in the Appendix, where the Official Journal instead starts a new list item. This page follows the Official Journal.
RenderingArticle numbering, paragraph breaks and list markers follow the Official Journal layout. No word of the licence was added, removed or reordered.
Not legal adviceSections 2–4 are a reader's summary. Only the licence text in section 5 has legal effect.
Verified2026-09-08