We came to the conclusion that this was the best licensing model after some hesitation. This hesitation stemmed from the hope that it would be possible to construct a copyleft data license, or reuse the only existing one (Open Database License (ODbL) v1.0 (Q1583)). We became convinced this was futile and thus a bad idea through reading these references: List of references on data licenses (Q2008).
For convenience, we maintain a list of related datasets and their licenses.
MediaWiki and the various extensions used for our hosting software have licenses listed at Special:Version.
The user-contributed software (for instance the user scripts and the gadgets in the MediaWiki namespace) are by default contributed under CC-BY-SA. This is due to Wikidata having that same license for its software and the expectation that contributors will cut and paste freely from Wikipedia and Wikidata.
Wikipedia and Wikidata encourage contributors to double license original contribution under the GPL, and we do the same here, on a per file basis.
We think there might be interesting options to explore with copyleft mixed licenses. We would love to have a deeper conversation with you on those topics. Please do reach out.
When adding data here, your contributions should reflect your best understanding of what you are representing. Whenever possible, contributions should be referenced by published, peer-reviewed literature or research. You can manually transcribe content from the following resources with appropriate attribution:
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You should not make contributions based on work presented by other researchers yet to be published or based on proprietary sources (purchased databases, company secrets, etc). You should also not create content from other content in an automated way, unless that content is CC0 too.
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Adapting, Dissecting, Augmenting
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PersonalData.IO, the integrative toolbox addressing Surveillance Capitalism. See http://wiki.personaldata.io.