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Relicensed to GPL 3

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Not much to this decision beyond the GPL being the EUPL-compatible license I am most comfortable with.
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European Union Public Licence v. 1.2
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
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the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.
EUPL © the European Union 2007, 2016
This European Union Public Licence (the 'EUPL') applies to the Work (as defined
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Licensed under the EUPL
or has expressed by any other means his willingness to license under the EUPL.
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Licence' refers to the licences listed in the appendix attached to this Licence.
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For the above reason, the Work is provided under the Licence on an 'as is'
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This disclaimer of warranty is an essential part of the Licence and a condition
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9. Additional agreements
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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.
11. Information to the public
In case of any Distribution or Communication of the Work by means of electronic
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must at least provide to the public the information requested by the applicable
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12. Termination 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
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13. Miscellaneous
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.
14. Jurisdiction
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
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15. Applicable Law
Without prejudice to specific agreement between parties,
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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.