Unfortunately, Apertium licensing is messy. Most things are under GPLv2+,
some things are GPLv3+, and a few are CC-BY-SA.
- apertium-eng is GPLv3+
- apertium-cat is GPLv2+ (note 2)
- apertium-eng-cat is GPLv3+
So any derivative of those would combine to GPLv3+, which you rightly
identify as only being one-way import compatible with CC-BY-SA. You can try
to get all significant authors of those packages to agree on CC-BY-SA.
-- Tino Didriksen
On Wed, 13 Mar 2019 at 00:40, Marc Riera Irigoyen <
marc.riera.irigo...@gmail.com> wrote:
> Hello,
>
> Jaume Ortolà (contributing mainly to apertium-spa-cat) and I are preparing
> a project to create a free ("libre") English-Catalan dictionary for
> Softcatalà [1]. This is part of a call by Fundació.cat [2] for projects
> promoting the Catalan language in technology, which will receive funding if
> selected.
>
> Our goal is to compile data from other sources (including terminology from
> Termcat [3] and entries from DACCO [4]) and revise it. In addition, we have
> been specially thinking about Apertium's English-Catalan pair as a
> potential source and destination of data, given our involvement in the
> project. It could be a great opportunity to expand the pair's bilingual
> dictionary with a big amount of high-quality entries.
>
> However, we are not sure about the potential licensing limitations this
> could pose. Apertium is licensed under GPLv3, yet the other sources we have
> found so far are licensed under CC-BY-SA. We know, for example, that
> CC-BY-SA is one-way compatible with GPLv3 since version 4.0, which would
> allow us to later include the data in Apertium, but not the other way. We
> have no specific license in mind for the project yet; we want to release
> the data and source for free for everyone to use it and reuse it, but the
> fact that this project involves data from different sources with different
> licenses makes everything a bit convoluted.
>
> Does anyone know which options do we have to be able to reuse Apertium
> data in such a project?
>
> Thank you very much in advance,
>
> *Marc Riera*
>
> [1] https://www.softcatala.org
> [2] https://convocatoria.fundacio.cat
> [3] http://www.termcat.cat
> [4] http://www.catalandictionary.org
>
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