Re: [Wikidata] Federation in the Wikidata Query Service

2017-04-01 Thread Gerard Meijssen 
Hoi,
Does it really ?
Thanks,
GerardM

On 1 April 2017 at 16:36, Maarten Dammers  wrote:

> 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
>
>
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Re: [Wikidata] Federation in the Wikidata Query Service

2017-04-01 Thread Gerard Meijssen 
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  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  and their SPARQL endpoint
>>> ..
>>>
>> 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/li
> censes/odbl/summary/ ), but would exclude any ND (NoDerivatives) and any
> NC (NonCommercial) licenses.
>
> Maarten
>
>
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Re: [Wikidata] Federation in the Wikidata Query Service

2017-04-01 Thread Maarten Dammers 

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  and their SPARQL endpoint
..

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

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Re: [Wikidata] Federation in the Wikidata Query Service

2017-03-31 Thread Stas Malyshev 
Hi!

> How about adding an ODbL licensed service? Would it be possible? I am
> thinking about SPOI  and their SPARQL endpoint
> ..

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
smalys...@wikimedia.org

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Re: [Wikidata] Federation in the Wikidata Query Service

2017-03-31 Thread Kingsley Idehen 
On 3/31/17 4:46 PM, Jan Macura wrote:
> That is a great news!
>
> How about adding an ODbL licensed service? Would it be possible? I am
> thinking about SPOI  and their SPARQL
> endpoint ..
>
> Thanks
>  Jan

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  > 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'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,
>
> 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@lists.wikimedia.org
> 
> https://lists.wikimedia.org/mailman/listinfo/wikidata
>  
>
> ___
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-- 
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
: 
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Re: [Wikidata] Federation in the Wikidata Query Service

2017-03-31 Thread Kingsley Idehen 
On 3/31/17 4:46 PM, Jan Macura wrote:
> That is a great news!
>
> How about adding an ODbL licensed service? Would it be possible? I am
> thinking about SPOI  and their SPARQL
> endpoint ..
>
> Thanks
>  Jan

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  > 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'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,
>
> 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@lists.wikimedia.org
> 
> https://lists.wikimedia.org/mailman/listinfo/wikidata
>  
>
> ___
> Wikidata mailing list
> Wikidata@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



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Re: [Wikidata] Federation in the Wikidata Query Service

2017-03-31 Thread Jan Macura 
That is a great news!

How about adding an ODbL licensed service? Would it be possible? I am
thinking about SPOI  and their SPARQL endpoint
..

Thanks
 Jan

On 31 March 2017 at 21:19, Kingsley Idehen  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_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
>
> [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
>
>
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Re: [Wikidata] Federation in the Wikidata Query Service

2017-03-31 Thread Kingsley Idehen 
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'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,

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%3Aendpoint%3Alist=select+distinct+*++where+%7B%3FendPoint+a+%3FentityType%7D==text%2Fx-html%2Btr_redir_for_subjs=121_redir_for_hrefs==3000
 
-- 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



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Re: [Wikidata] Federation in the Wikidata Query Service

2017-03-31 Thread Kingsley Idehen 
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'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,

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



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Re: [Wikidata] Federation in the Wikidata Query Service

2017-03-31 Thread Stas Malyshev 
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
smalys...@wikimedia.org

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Re: [Wikidata] Federation in the Wikidata Query Service

2017-03-31 Thread Stas Malyshev 
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
smalys...@wikimedia.org

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Re: [Wikidata] Federation in the Wikidata Query Service

2017-03-31 Thread James Hare 
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 
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
> smalys...@wikimedia.org
>
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Re: [Wikidata] Federation in the Wikidata Query Service

2017-03-31 Thread Stas Malyshev 
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 le...@wikimedia.org? I don't
know, I don't have much experience with this) that would make it much
easier.

-- 
Stas Malyshev
smalys...@wikimedia.org

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Re: [Wikidata] Federation in the Wikidata Query Service

2017-03-31 Thread Jerven Tjalling Bolleman 

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:

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



--
---
Jerven BollemanJerven.Bolleman@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
---

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Re: [Wikidata] Federation in the Wikidata Query Service

2017-03-30 Thread Gerard Meijssen 
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  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
> smalys...@wikimedia.org
>
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> https://lists.wikimedia.org/mailman/listinfo/wikidata
>
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[Wikidata] Federation in the Wikidata Query Service

2017-03-30 Thread Stas Malyshev 
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
smalys...@wikimedia.org

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