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Re: Licensing advice

From: Barry Norton <barry.norton@ontotext.com>
Date: Fri, 12 Jul 2013 18:08:53 +0100
Message-ID: <51E03825.7090203@ontotext.com>
To: public-lod@w3.org
On 12/07/13 18:02, Víctor Rodríguez Doncel wrote:
> Hi Barry,
>
> First, the obvious: the MusicBrainz core data is in the Public Domain, 
> and you can freely publish its transformation as you like, but the 
> MusicBrainz supplementary data is CC-BY-NC-SA and its transformations 
> must be shared "alike".

Agreed. More as an academic curiosity we were wondering whether data 
produced through mappings could be constrained by the licensing applied 
to those mappings.

> So, if you have created a dataset, this time in RDF, containing the 
> "user ratings" (supplementary data) in MusicBrainz, you have little 
> choice: CC-BY-NC-SA. Yet DBpedia requires CC-BY-SA, so in theory this 
> downgrade would not be acceptable: you should not include in DBpedia 
> any piece belonging to the "MusicBrainz Supplementary Data".

I was only thinking about the linkset (sameAs and seeAlso 
relationships), but now you've made me wonder whether even the 
Wikipedia-targeting advanced relationships aren't actually supplemental 
data - I will check this with the MB folks.

> Next, about the granularity level for licensing: individuals of 
> rr:TriplesMap look a perfect target to be attributed and licensed. 

Yes, I think that would be neat.

> [...] A single triple pointing to a license (  <myTripleMap> 
> dc:license <license_of_your_choice>) should suffice.

Agreed, though the attribution (dc:creator, I guess - plus potentially 
dc:contributor) could go over subsets.

> Finally, I see the question "triples that are created using it" as 
> very conflictive one. Are those triples transformed versions of the 
> mapping?
>

Yes, as above. It's a bit of an academic question whether mappings can 
constrain the license of data created using them (as certain software 
affects products run through it - cf. Apple's)

Barry


>
> El 12/07/2013 14:20, Barry Norton escribió:
>>
>> I'd like to publicly release R2RML mappings for the MusicBrainz 
>> dataset. DBpedia has shown interest in including the subset that can 
>> be used to create a linkset.
>>
>> Any idea what (kind of) licence could/should apply? (To be clear, to 
>> the mappings, as opposed to the dataset)
>>
>> I'd also like to attach, since R2RML is RDF, a licence and 
>> attribution on a per rr:TriplesMap basis. (The mappings are hosted on 
>> github and contributions will be accepted as I'm never going to get 
>> through all of the MB Advanced Relationships, a moving target, myself 
>> and I'm being a bottleneck.)
>>
>> The question's also been raised on whether a given licence can in 
>> turn impose conditions on the triples that are created using it (as 
>> derivative works)? Does that sound feasible?
>>
>> Any input appreciated.
>>
>> Barry
>>
>
>
Received on Friday, 12 July 2013 17:09:19 UTC

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