Thank you for your feedback.

As you will have noticed, I am not an expert on licenses and have picked CC 
BY-SA 4.0 because I believe Maxmind’s database was licensed under this before.

We can of course change the license and I am happy to take your suggestions. 
What I would like the license to be is the following:

* it should be free for anyone to use but not possible to sell the database 
* it would be nice to encourage users to give back to the project and help them 
to help us to improve the data wherever possible

I cannot come up with anything else this license should or could cover.


> On 15 Jun 2020, at 21:14, Francesco Poli <> wrote:
> On Mon, 15 Jun 2020 21:24:45 +0200 Roberto wrote:
>>> On Mon, Jun 15, 2020 at 08:04:47PM +0200, Francesco Poli wrote:
>>> The reason is that the one-way compatibility mechanism of CC-by-sa v4.0
>>> is not exceptionally clear, and, without that compatibility, the
>>> CC-by-sa v4.0 license itself has a number of controversial clauses
>>> (non-free, in my own personal opinion).
>> CC-BY 4.0 (without SA) may be better than CC-BY-SA in that case,
>> according to the FSF it's compatible and accepted as a free license (for
>> content which is not a program).
> Actually, although the FSF [claims] that CC-by v4.0 is compatible with
> the GNU GPL, it does not explain how the restrictions found in CC-by
> v4.0 can be reconciled with the GNU GPL.
> [claims]: <>
> I asked the FSF to publish a reasoned analysis on this.
> I did so back in 2015, but nothing has been disclosed yet (as far as I
> know).   :-(
> I am personally *not* convinced that CC-by v4.0 is GPL-compatible.
> Please note that the CC-by v4.0 has no explicit compatibility clause
> (contrary to CC-by-sa v4.0, which has a one-way compatibility
> mechanism)...
> -- 
> There's not a second to spare! To the laboratory!
> ..................................................... Francesco Poli .
> GnuPG key fpr == CA01 1147 9CD2 EFDF FB82  3925 3E1C 27E1 1F69 BFFE

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