Federation in the Wikidata Query Service

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Open Library, OCLC (VIAF) and...

Monumental – cultural heritage...

Stas Malyshev

31 Mar 2017 31 Mar '17

12:30 a.m.

Hello, We've been working on integrating some external databases in the Query Service endpoint. You can now query in the same time Wikidata and other free knowledge bases. For now, only databases released under the most compatible licenses, such as CC0, are available. Currently available: * Europeana[1], the huge collection of cultural data, which is entirely available in public domain. * Nomisma.org[2], a collaborative project to provide stable digital representations of numismatic concepts. * Biblioteca Virtual Miguel de Cervantes [3] * Biblioteca Nacional de España [4] Soon, we plan to also enable querying other databases, with licenses such as CC-BY. We plan to continue add endpoints based on user requests. The currently available endpoints are listed here: https://query.wikidata.org/copyright.html The documentation about the feature (which will also be updated when we add more endpoints) is in the Query Service User Manual [5]. Here are some examples to understand how to build such queries: https://www.wikidata.org/wiki/User:Smalyshev_(WMF)/Federation Thanks a lot for your input! If you have any question or problem, feel free to contact me. [1] http://labs.europeana.eu/api/linked-open-data-sparql-endpoint [2] http://nomisma.org/ [3] http://data.cervantesvirtual.com/about [4] http://datos.bne.es/sparql?help=intro [5] https://www.mediawiki.org/wiki/Wikidata_query_service/User_Manual#Federation -- Stas Malyshev smalyshev(a)wikimedia.org

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Gerard Meijssen

31 Mar 31 Mar

4:48 a.m.

Hoi, Would it be possible to include DBpedia as a matter of urgency. They added the cc-by-sa because at that time wisdom was to have the same license as Wikipedia to prevent upset people. Given the strong relation between what we do in our projects and what they do in theirs it is easy to come up with user scenarios that will benefit both our projects. Thanks, GerardM On 31 March 2017 at 02:30, Stas Malyshev <smalyshev(a)wikimedia.org> wrote:

...

Hello, We've been working on integrating some external databases in the Query Service endpoint. You can now query in the same time Wikidata and other free knowledge bases. For now, only databases released under the most compatible licenses, such as CC0, are available. Currently available: * Europeana[1], the huge collection of cultural data, which is entirely available in public domain. * Nomisma.org[2], a collaborative project to provide stable digital representations of numismatic concepts. * Biblioteca Virtual Miguel de Cervantes [3] * Biblioteca Nacional de España [4] Soon, we plan to also enable querying other databases, with licenses such as CC-BY. We plan to continue add endpoints based on user requests. The currently available endpoints are listed here: https://query.wikidata.org/copyright.html The documentation about the feature (which will also be updated when we add more endpoints) is in the Query Service User Manual [5]. Here are some examples to understand how to build such queries: https://www.wikidata.org/wiki/User:Smalyshev_(WMF)/Federation Thanks a lot for your input! If you have any question or problem, feel free to contact me. [1] http://labs.europeana.eu/api/linked-open-data-sparql-endpoint [2] http://nomisma.org/ [3] http://data.cervantesvirtual.com/about [4] http://datos.bne.es/sparql?help=intro [5] https://www.mediawiki.org/wiki/Wikidata_query_service/ User_Manual#Federation -- Stas Malyshev smalyshev(a)wikimedia.org _______________________________________________ Wikidata mailing list Wikidata(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata

Jerven Tjalling Bolleman

12:56 p.m.

Hi Stas, Can I assume the brief waiver by the UniProt PI to not be sufficient for allowing even the federated use in WikiData of sparql.uniprot.org. If that assumption is correct I will restart the long UniProt internal struggle to get that fixed. Regards, Jerven On 03/31/2017 02:30 AM, Stas Malyshev wrote:

...

-- ------------------------------------------------------------------- Jerven Bolleman Jerven.Bolleman(a)sib.swiss SIB Swiss Institute of Bioinformatics Tel: +41 (0)22 379 58 85 CMU, rue Michel Servet 1 Fax: +41 (0)22 379 58 58 1211 Geneve 4, Switzerland www.sib.swiss - www.uniprot.org Follow us at https://twitter.com/#!/uniprot -------------------------------------------------------------------

Stas Malyshev

5:02 p.m.

Hi!

...

Can I assume the brief waiver by the UniProt PI to not be sufficient for allowing even the federated use in WikiData of sparql.uniprot.org. If that assumption is correct I will restart the long UniProt internal struggle to get that fixed.

Frankly, I am not sure what to do with this. The ND part is kind of concerning, and I'm not a lawyer so I am not even sure I understand it properly. While it looks like the "BY" part can be satisfied with https://query.wikidata.org/copyright.html type page, the ND part still remains and I'm not sure how to deal with it. The letter answer is great and I am thankful for it, but what I am concerned about is how to make it the matter of record - in 5 years, maybe both myself and person who wrote this letter would forget about it, and the system still needs to be maintained. So if there were some statement on official UniProt docs that says this case is OK (within some kind of FAQ probably? Maybe http://www.uniprot.org/help/license ) or somehow a way to make an official permission (some kind of letter to legal(a)wikimedia.org? I don't know, I don't have much experience with this) that would make it much easier. -- Stas Malyshev smalyshev(a)wikimedia.org

James Hare

6:59 p.m.

This is a wonderful and most welcome development. What is the process for getting a query service added? I would like to add the Librarybase endpoint, http://sparql.librarybase.wmflabs.org/, but I want to make sure that it meets all the requirements. On Fri, Mar 31, 2017 at 2:30 AM, Stas Malyshev <smalyshev(a)wikimedia.org> wrote:

...

Hello, We've been working on integrating some external databases in the Query Service endpoint. You can now query in the same time Wikidata and other free knowledge bases. For now, only databases released under the most compatible licenses, such as CC0, are available. Currently available: * Europeana[1], the huge collection of cultural data, which is entirely available in public domain. * Nomisma.org[2], a collaborative project to provide stable digital representations of numismatic concepts. * Biblioteca Virtual Miguel de Cervantes [3] * Biblioteca Nacional de España [4] Soon, we plan to also enable querying other databases, with licenses such as CC-BY. We plan to continue add endpoints based on user requests. The currently available endpoints are listed here: https://query.wikidata.org/copyright.html The documentation about the feature (which will also be updated when we add more endpoints) is in the Query Service User Manual [5]. Here are some examples to understand how to build such queries: https://www.wikidata.org/wiki/User:Smalyshev_(WMF)/Federation Thanks a lot for your input! If you have any question or problem, feel free to contact me. [1] http://labs.europeana.eu/api/linked-open-data-sparql-endpoint [2] http://nomisma.org/ [3] http://data.cervantesvirtual.com/about [4] http://datos.bne.es/sparql?help=intro [5] https://www.mediawiki.org/wiki/Wikidata_query_service/ User_Manual#Federation -- Stas Malyshev smalyshev(a)wikimedia.org _______________________________________________ Wikidata mailing list Wikidata(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata

Stas Malyshev

7:12 p.m.

Hi!

...

What is the process for getting a query service added? I would like to add the Librarybase endpoint, http://sparql.librarybase.wmflabs.org/, but I want to make sure that it meets all the requirements.

Right now it's https://www.wikidata.org/wiki/Wikidata:SPARQL_federation_input. After we're done with CC-By ones, I'll probably clean up that page a bit and update it for more long-term structure but it seems something like that would work. -- Stas Malyshev smalyshev(a)wikimedia.org

Stas Malyshev

7:15 p.m.

Hi!

...

Would it be possible to include DBpedia as a matter of urgency. They added the cc-by-sa because at that time wisdom was to have the same license as Wikipedia to prevent upset people. Given the strong relation between what we do in our projects and what they do in theirs it is easy to come up with user scenarios that will benefit both our projects.

I understand the reason for CC-BY in DBpedia, and it looks like adding it to the license/copyright/acknowledgment page should be enough. I planned from the start to launch it with small number of endpoints and then extend it. I plan to see how it fares and if there's not anything wrong that we've missed (doesn't look like it so far, which is good) and add next batch next week - which means it would be deployed in April 10th deployment window (we deploy WDQS stuff on Mondays usually). -- Stas Malyshev smalyshev(a)wikimedia.org

Kingsley Idehen

7:19 p.m.

On 3/31/17 3:12 PM, Stas Malyshev wrote:

...

Hi!

Stas, You can also add the SPARQL endpoint associated with our URIBurner service. This service will also allow you to nest SPARQL-FED Queries. [1] http://linkeddata.uriburner.com [2] http://linkeddata.uriburner.com/sparql -- Regards, Kingsley Idehen Founder & CEO OpenLink Software (Home Page: http://www.openlinksw.com) Weblogs (Blogs): Legacy Blog: http://www.openlinksw.com/blog/~kidehen/ Blogspot Blog: http://kidehen.blogspot.com Medium Blog: https://medium.com/@kidehen Profile Pages: Pinterest: https://www.pinterest.com/kidehen/ Quora: https://www.quora.com/profile/Kingsley-Uyi-Idehen Twitter: https://twitter.com/kidehen Google+: https://plus.google.com/+KingsleyIdehen/about LinkedIn: http://www.linkedin.com/in/kidehen Web Identities (WebID): Personal: http://kingsley.idehen.net/dataspace/person/kidehen#this : http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this

Kingsley Idehen

8:14 p.m.

On 3/31/17 3:12 PM, Stas Malyshev wrote:

...

Hi!

Stas, Some sources of SPARQL Endpoints that could be of interest: [1] https://del.icio.us/kidehen/sparql_endpoint [2] http://linkeddata.uriburner.com/sparql?default-graph-uri=urn%3Asparql%3Aend… -- SPARQL Query Results page listing some of the endpoints in the LOD Cloud -- Regards, Kingsley Idehen Founder & CEO OpenLink Software (Home Page: http://www.openlinksw.com) Weblogs (Blogs): Legacy Blog: http://www.openlinksw.com/blog/~kidehen/ Blogspot Blog: http://kidehen.blogspot.com Medium Blog: https://medium.com/@kidehen Profile Pages: Pinterest: https://www.pinterest.com/kidehen/ Quora: https://www.quora.com/profile/Kingsley-Uyi-Idehen Twitter: https://twitter.com/kidehen Google+: https://plus.google.com/+KingsleyIdehen/about LinkedIn: http://www.linkedin.com/in/kidehen Web Identities (WebID): Personal: http://kingsley.idehen.net/dataspace/person/kidehen#this : http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this

Jan Macura

8:46 p.m.

That is a great news! How about adding an ODbL licensed service? Would it be possible? I am thinking about SPOI <http://sdi4apps.eu/spoi/> and their SPARQL endpoint <http://data.plan4all.eu/sparql>.. Thanks Jan On 31 March 2017 at 21:19, Kingsley Idehen <kidehen(a)openlinksw.com> wrote:

...

On 3/31/17 3:12 PM, Stas Malyshev wrote: Hi! What is the process for getting a query service added? I would like to add the Librarybase endpoint, http://sparql.librarybase.wmflabs.org/, but I want to make sure that it meets all the requirements. Right now it'shttps://www.wikidata.org/wiki/Wikidata:SPARQL_federation_inputnput. After we're done with CC-By ones, I'll probably clean up that page a bit and update it for more long-term structure but it seems something like that would work. Stas, You can also add the SPARQL endpoint associated with our URIBurner service. This service will also allow you to nest SPARQL-FED Queries. [1] http://linkeddata.uriburner.com [2] http://linkeddata.uriburner.com/sparql -- Regards, Kingsley Idehen Founder & CEO OpenLink Software (Home Page: http://www.openlinksw.com) Weblogs (Blogs): Legacy Blog: http://www.openlinksw.com/blog/~kidehen/ Blogspot Blog: http://kidehen.blogspot.com Medium Blog: https://medium.com/@kidehen Profile Pages: Pinterest: https://www.pinterest.com/kidehen/ Quora: https://www.quora.com/profile/Kingsley-Uyi-Idehen Twitter: https://twitter.com/kidehen Google+: https://plus.google.com/+KingsleyIdehen/about LinkedIn: http://www.linkedin.com/in/kidehen Web Identities (WebID): Personal: http://kingsley.idehen.net/dataspace/person/kidehen#this : http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this _______________________________________________ Wikidata mailing list Wikidata(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata

Kingsley Idehen

9:38 p.m.

On 3/31/17 4:46 PM, Jan Macura wrote:

...

We don't control that service. By default, Virtuoso Open Source Edition SPARQL endpoints are typically CC-BY-SA. Kingsley

...

On 31 March 2017 at 21:19, Kingsley Idehen <kidehen(a)openlinksw.com <mailto:kidehen@openlinksw.com>> wrote: On 3/31/17 3:12 PM, Stas Malyshev wrote:

Hi!

What is the process for getting a query service added? I would like to add the Librarybase endpoint, http://sparql.librarybase.wmflabs.org/ <http://sparql.librarybase.wmflabs.org/>, but I want to make sure that it meets all the requirements.

Right now it's https://www.wikidata.org/wiki/Wikidata:SPARQL_federation_input <https://www.wikidata.org/wiki/Wikidata:SPARQL_federation_input>. After we're done with CC-By ones, I'll probably clean up that page a bit and update it for more long-term structure but it seems something like that would work.

Stas, You can also add the SPARQL endpoint associated with our URIBurner service. This service will also allow you to nest SPARQL-FED Queries. [1] http://linkeddata.uriburner.com <http://linkeddata.uriburner.com> [2] http://linkeddata.uriburner.com/sparql <http://linkeddata.uriburner.com/sparql> -- Regards, Kingsley Idehen Founder & CEO OpenLink Software (Home Page: http://www.openlinksw.com) Weblogs (Blogs): Legacy Blog: http://www.openlinksw.com/blog/~kidehen/ <http://www.openlinksw.com/blog/%7Ekidehen/> Blogspot Blog: http://kidehen.blogspot.com Medium Blog: https://medium.com/@kidehen Profile Pages: Pinterest: https://www.pinterest.com/kidehen/ <https://www.pinterest.com/kidehen/> Quora: https://www.quora.com/profile/Kingsley-Uyi-Idehen <https://www.quora.com/profile/Kingsley-Uyi-Idehen> Twitter: https://twitter.com/kidehen Google+: https://plus.google.com/+KingsleyIdehen/about <https://plus.google.com/+KingsleyIdehen/about> LinkedIn: http://www.linkedin.com/in/kidehen <http://www.linkedin.com/in/kidehen> Web Identities (WebID): Personal: http://kingsley.idehen.net/dataspace/person/kidehen#this <http://kingsley.idehen.net/dataspace/person/kidehen#this> : http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this <http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this> _______________________________________________ Wikidata mailing list Wikidata(a)lists.wikimedia.org <mailto:Wikidata@lists.wikimedia.org> https://lists.wikimedia.org/mailman/listinfo/wikidata <https://lists.wikimedia.org/mailman/listinfo/wikidata> _______________________________________________ Wikidata mailing list Wikidata(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata

-- Regards, Kingsley Idehen Founder & CEO OpenLink Software (Home Page: http://www.openlinksw.com) Weblogs (Blogs): Legacy Blog: http://www.openlinksw.com/blog/~kidehen/ Blogspot Blog: http://kidehen.blogspot.com Medium Blog: https://medium.com/@kidehen Profile Pages: Pinterest: https://www.pinterest.com/kidehen/ Quora: https://www.quora.com/profile/Kingsley-Uyi-Idehen Twitter: https://twitter.com/kidehen Google+: https://plus.google.com/+KingsleyIdehen/about LinkedIn: http://www.linkedin.com/in/kidehen Web Identities (WebID): Personal: http://kingsley.idehen.net/dataspace/person/kidehen#this : http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this

Kingsley Idehen

9:40 p.m.

New subject: Correction: Federation in the Wikidata Query Service

On 3/31/17 4:46 PM, Jan Macura wrote:

...

Correction, [1] http://linkeddata.uriburner.com <http://linkeddata.uriburner.com> [2] http://linkeddata.uriburner.com/sparql <http://linkeddata.uriburner.com/sparql> Are controlled by us, and they are CC-BY-SA. That needs to be fixed in the endpoint skin (UI) and metadata. I'll have that fixed. Kingsley

...

On 31 March 2017 at 21:19, Kingsley Idehen <kidehen(a)openlinksw.com <mailto:kidehen@openlinksw.com>> wrote: On 3/31/17 3:12 PM, Stas Malyshev wrote:

Hi!

Stas, You can also add the SPARQL endpoint associated with our URIBurner service. This service will also allow you to nest SPARQL-FED Queries. [1] http://linkeddata.uriburner.com <http://linkeddata.uriburner.com> [2] http://linkeddata.uriburner.com/sparql <http://linkeddata.uriburner.com/sparql> -- Regards, Kingsley Idehen Founder & CEO OpenLink Software (Home Page: http://www.openlinksw.com) Weblogs (Blogs): Legacy Blog: http://www.openlinksw.com/blog/~kidehen/ <http://www.openlinksw.com/blog/%7Ekidehen/> Blogspot Blog: http://kidehen.blogspot.com Medium Blog: https://medium.com/@kidehen Profile Pages: Pinterest: https://www.pinterest.com/kidehen/ <https://www.pinterest.com/kidehen/> Quora: https://www.quora.com/profile/Kingsley-Uyi-Idehen <https://www.quora.com/profile/Kingsley-Uyi-Idehen> Twitter: https://twitter.com/kidehen Google+: https://plus.google.com/+KingsleyIdehen/about <https://plus.google.com/+KingsleyIdehen/about> LinkedIn: http://www.linkedin.com/in/kidehen <http://www.linkedin.com/in/kidehen> Web Identities (WebID): Personal: http://kingsley.idehen.net/dataspace/person/kidehen#this <http://kingsley.idehen.net/dataspace/person/kidehen#this> : http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this <http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this> _______________________________________________ Wikidata mailing list Wikidata(a)lists.wikimedia.org <mailto:Wikidata@lists.wikimedia.org> https://lists.wikimedia.org/mailman/listinfo/wikidata <https://lists.wikimedia.org/mailman/listinfo/wikidata> _______________________________________________ Wikidata mailing list Wikidata(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata

Kingsley Idehen

10:15 p.m.

On 3/31/17 4:46 PM, Jan Macura wrote:

...

Jan, As an aside, for those who might be interested, here's a link to a Tweet re., analyzing licenses associated with content loaded into our URIBurner service: https://twitter.com/kidehen/status/847934563036909569 Kingsley

...

On 31 March 2017 at 21:19, Kingsley Idehen <kidehen(a)openlinksw.com <mailto:kidehen@openlinksw.com>> wrote: On 3/31/17 3:12 PM, Stas Malyshev wrote:

Hi!

Stas, You can also add the SPARQL endpoint associated with our URIBurner service. This service will also allow you to nest SPARQL-FED Queries. [1] http://linkeddata.uriburner.com <http://linkeddata.uriburner.com> [2] http://linkeddata.uriburner.com/sparql <http://linkeddata.uriburner.com/sparql> -- Regards, Kingsley Idehen Founder & CEO OpenLink Software (Home Page: http://www.openlinksw.com) Weblogs (Blogs): Legacy Blog: http://www.openlinksw.com/blog/~kidehen/ <http://www.openlinksw.com/blog/%7Ekidehen/> Blogspot Blog: http://kidehen.blogspot.com Medium Blog: https://medium.com/@kidehen Profile Pages: Pinterest: https://www.pinterest.com/kidehen/ <https://www.pinterest.com/kidehen/> Quora: https://www.quora.com/profile/Kingsley-Uyi-Idehen <https://www.quora.com/profile/Kingsley-Uyi-Idehen> Twitter: https://twitter.com/kidehen Google+: https://plus.google.com/+KingsleyIdehen/about <https://plus.google.com/+KingsleyIdehen/about> LinkedIn: http://www.linkedin.com/in/kidehen <http://www.linkedin.com/in/kidehen> Web Identities (WebID): Personal: http://kingsley.idehen.net/dataspace/person/kidehen#this <http://kingsley.idehen.net/dataspace/person/kidehen#this> : http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this <http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this> _______________________________________________ Wikidata mailing list Wikidata(a)lists.wikimedia.org <mailto:Wikidata@lists.wikimedia.org> https://lists.wikimedia.org/mailman/listinfo/wikidata <https://lists.wikimedia.org/mailman/listinfo/wikidata> _______________________________________________ Wikidata mailing list Wikidata(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata

Stas Malyshev

10:54 p.m.

Hi!

...

How about adding an ODbL licensed service? Would it be possible? I am thinking about SPOI <http://sdi4apps.eu/spoi/> and their SPARQL endpoint <http://data.plan4all.eu/sparql>..

ODBL seems to be in the same vein as CC-BY-SA, so if CC-BY is ok, that should be OK too. Please add the descriptions to https://www.wikidata.org/wiki/Wikidata:SPARQL_federation_input -- Stas Malyshev smalyshev(a)wikimedia.org

Jan Macura

11:24 p.m.

New subject: Correction: Federation in the Wikidata Query Service

On 31 March 2017 at 23:40, Kingsley Idehen <kidehen(a)openlinksw.com> wrote:

...

Are controlled by us, and they are CC-BY-SA. That needs to be fixed in the endpoint skin (UI) and metadata. I'll have that fixed.

Thanks for your concern! I can't see any license information at the endpoint page. SPOI has the license info in both its metadata (DOAP <http://sdi4apps.eu/spoi/doap-spoi.rdf> & VoID <http://sdi4apps.eu/spoi/void-spoi.ttl>). It's not sufficient? Jan

Kingsley Idehen

1 Apr 1 Apr

2:48 a.m.

New subject: Correction: Federation in the Wikidata Query Service

On 3/31/17 7:24 PM, Jan Macura wrote:

...

On 31 March 2017 at 23:40, Kingsley Idehen <kidehen(a)openlinksw.com <mailto:kidehen@openlinksw.com>> wrote: Are controlled by us, and they are CC-BY-SA. That needs to be fixed in the endpoint skin (UI) and metadata. I'll have that fixed. Thanks for your concern! I can't see any license information at the endpoint page. SPOI has the license info in both its metadata (DOAP <http://sdi4apps.eu/spoi/doap-spoi.rdf> & VoID <http://sdi4apps.eu/spoi/void-spoi.ttl>). It's not sufficient? Jan

That's sufficient. Note, this is a reply to a mail that should have been replaced by my correction mail :) -- Regards, Kingsley Idehen Founder & CEO OpenLink Software (Home Page: http://www.openlinksw.com) Weblogs (Blogs): Legacy Blog: http://www.openlinksw.com/blog/~kidehen/ Blogspot Blog: http://kidehen.blogspot.com Medium Blog: https://medium.com/@kidehen Profile Pages: Pinterest: https://www.pinterest.com/kidehen/ Quora: https://www.quora.com/profile/Kingsley-Uyi-Idehen Twitter: https://twitter.com/kidehen Google+: https://plus.google.com/+KingsleyIdehen/about LinkedIn: http://www.linkedin.com/in/kidehen Web Identities (WebID): Personal: http://kingsley.idehen.net/dataspace/person/kidehen#this : http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this

Maarten Dammers

12:14 p.m.

Hi Stas, On 01-04-17 00:54, Stas Malyshev wrote:

...

Hi!

How about adding an ODbL licensed service? Would it be possible? I am thinking about SPOI <http://sdi4apps.eu/spoi/> and their SPARQL endpoint <http://data.plan4all.eu/sparql>..

ODBL seems to be in the same vein as CC-BY-SA, so if CC-BY is ok, that should be OK too. Please add the descriptions to https://www.wikidata.org/wiki/Wikidata:SPARQL_federation_input

Great new feature you have here! I would only add endpoints that use free licenses that are compatible with our terms of use ( https://wikimediafoundation.org/wiki/Terms_of_Use#7._Licensing_of_Content ). See http://freedomdefined.org/Definition for a more general explanation. This would include ODbL ( https://opendatacommons.org/licenses/odbl/summary/ ), but would exclude any ND (NoDerivatives) and any NC (NonCommercial) licenses. Maarten

Gerard Meijssen

2:15 p.m.

Hoi, What I fail to understand in this discussion about licenses is what it is we achieve by being restrictive. Our license is CC-0 so anybody can do with our data as they please. When we allow query with any and all external sources, there are activities that may not be possible because of a license. What are they? When people link Wikidata and compare values, finding a difference is imho not licensed because it is original research. When people link Wikidata and add Wikidata statements elsewhere, it is allowed because of our license. When people link Wikidata and add items or statements to Wikidata only then there is a reason to respect the license of the external source and disallow it. I can imagine that we disallow update statements in Wikidata based on the license of the external Source. For all other objectives it is the user who is responsible for his actions. Not allowing this is imho contrary to our motto: "sharing in the sum of all knowledge". Thanks, GerardM On 1 April 2017 at 14:14, Maarten Dammers <maarten(a)mdammers.nl> wrote:

...

Hi Stas, On 01-04-17 00:54, Stas Malyshev wrote:

Hi! How about adding an ODbL licensed service? Would it be possible? I am

thinking about SPOI <http://sdi4apps.eu/spoi/> and their SPARQL endpoint <http://data.plan4all.eu/sparql>..

licenses that are compatible with our terms of use ( https://wikimediafoundation.org/wiki/Terms_of_Use#7._Licensing_of_Content ). See http://freedomdefined.org/Definition for a more general explanation. This would include ODbL ( https://opendatacommons.org/li censes/odbl/summary/ ), but would exclude any ND (NoDerivatives) and any NC (NonCommercial) licenses. Maarten _______________________________________________ Wikidata mailing list Wikidata(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata

Maarten Dammers

2:36 p.m.

Hi Gerard, On 01-04-17 16:15, Gerard Meijssen wrote:

...

Hoi, What I fail to understand in this discussion about licenses is what it is we achieve by being restrictive.

Same reason why Wikimedia Commons only allows free licenses: Re-users can freely use our content without worrying that it contains non-free content. It's part of our core values listed at https://wikimediafoundation.org/wiki/Terms_of_Use : You are free to: * Read and Print our articles and other media free of charge. * Share and Reuse our articles and other media under free and open licenses. * Contribute To and Edit our various sites or Projects. This excludes us from including non-free content in the output of the query engine. Maarten

Gerard Meijssen

2:43 p.m.

Hoi, Does it really ? Thanks, GerardM On 1 April 2017 at 16:36, Maarten Dammers <maarten(a)mdammers.nl> wrote:

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Hi Gerard, On 01-04-17 16:15, Gerard Meijssen wrote:

Hoi, What I fail to understand in this discussion about licenses is what it is we achieve by being restrictive.

Same reason why Wikimedia Commons only allows free licenses: Re-users can freely use our content without worrying that it contains non-free content. It's part of our core values listed at https://wikimediafoundation.or g/wiki/Terms_of_Use : You are free to: * Read and Print our articles and other media free of charge. * Share and Reuse our articles and other media under free and open licenses. * Contribute To and Edit our various sites or Projects. This excludes us from including non-free content in the output of the query engine. Maarten _______________________________________________ Wikidata mailing list Wikidata(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata

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Gerard Meijssen
James Hare
Jan Macura
Jerven Tjalling Bolleman
Kingsley Idehen
Maarten Dammers
Stas Malyshev