Re: [Wikidata] About OCLC and DBpedia Links

[Ettore RIZZA]

>
> This flow involves human intervention so it is not instant. It can take
> years.


Arf, yes, this is unfortunately quite a plain and rational argument. Thank
you very much for your answer.

2018-03-06 20:26 GMT+01:00 Ettore RIZZA :

> If Dbpedia has “same as” then Wikidata doesn’t have to duplicate that
>> information you can ask dbpedia what is same as Q7724
>
>
>
> Sebastian Hellman beats me to my question. Perhaps our points of view are
> different. From mine, which is that of a data consumer and a network
> enthusiast, the difference between a simple link and two-way links is huge.
> I mean, links are cheap and linked data is just about links. Instead of a
> heavy, complex and often empty federated SPAQL query, it would be enough
> to ask Wikidata to get the information of DBpedia (I think Wikidata is
> intended to contain one day all the DBpedia entities). Just as one will be
> able to query Wikidata one day to know the VIAF ID of any writer. I believe
> that Wikidata is destined to become a data hub of this kind, but maybe I'm
> wrong.
>
> Best regards,
>
> Ettore Rizza
>
> 2018-03-06 20:11 GMT+01:00 Sebastian Hellmann  leipzig.de>:
>
>> Hm, now I am also curious and would like to ask the same question as
>> Ettore. What is the policy here?
>>
>> Viaf has schema.org backlinks, see https://viaf.org/viaf/85312226/rdf.xml
>>
>> http://www.wikidata.org/entity/Q80;
>> />
>> Then it's ok to duplicate? because it is not owl:sameAs?
>>
>> All the best,
>> Sebastain
>>
>>
>> On 06.03.2018 20:01, Magnus Sälgö wrote:
>>
>> If Dbpedia has “same as” then Wikidata doesn’t have to duplicate that
>> information you can ask dbpedia what is same as Q7724
>>
>> Regards
>> Magnus Sälgö
>> Stockholm, Sweden
>>
>> 6 mars 2018 kl. 19:49 skrev Ettore RIZZA :
>>
>> First of all, thank you all for your answers.
>>
>> @Magnus and Thad: it's a bit what I suspected. Since the URL to WorldCat
>> can be rebuilt from the Library of congress authority ID, I guess someone
>> thought it would be a duplicate.
>>
>> But 1) I'm not sure that there is a 1 to 1 mapping between all Worldcat
>> Identities and the Library of Congress 2) It would be rather strange that a
>> Library of Congress ID would also serve as an ID for a "competitor" (ie
>> OCLC, which maintains Worldcat and VIAF) 3) One would then wonder why
>> Wikipedia provides both links to the Library of Congress Authority ID and
>> Worldcat Identities.
>>
>> With respect for the fact that Wikidata already contains links to VIAF
>> and that VIAF contains links to Worldcat Identities, this transitivity
>> reasoning could apply to many other Authority IDs, I think.
>>
>> @Sebastian: Il would be great! I'll follow this project closely, just as
>> I'm already following your papers
>> .
>> And it is precisely because I know that there is a desire for
>> "rapprochement" on both sides that I asked why there is absolutely nothing
>> in Wikidata that links to DBpedia (or Yago), whereas DBpedia contains a lot
>> of owl: sameAs to Wikidata. All this must have been discussed somewhere I
>> suppose. Still, I do not even find a property proposal for "DBpedia link".
>>
>> 2018-03-06 18:59 GMT+01:00 Sebastian Hellmann <
>> hellm...@informatik.uni-leipzig.de>:
>>
>>> Hi Ettore,
>>>
>>> we just released a very early prototype of the new DBpedia:
>>>
>>> http://88.99.242.78/hdt/en_wiki_de_sv_nl_fr-replaced.nt.bz2
>>> 
>>>
>>> I attached the first 1000 triples. The data is a merge of Wikidata + 5
>>> DBpedias from the 5 largest Wikipedia versions. Overall, there are many
>>> issues, but we have a test-driven data engineering process combined with
>>> Scrum and biweekly releases, next one is on March 15th. The new IDs are
>>> also stable by design.
>>>
>>> We discussed how to effectively reuse all technologies we have for
>>> Wikidata and also Wikipedia and are applying with this project at the
>>> moment: https://meta.wikimedia.org/wiki/Grants:Project/DBpedia/Globa
>>> lFactSync
>>> 
>>> (Endorsements on the main page and 

Re: [Wikidata] About OCLC and DBpedia Links

[Ettore RIZZA]

>
> If Dbpedia has “same as” then Wikidata doesn’t have to duplicate that
> information you can ask dbpedia what is same as Q7724



Sebastian Hellman beats me to my question. Perhaps our points of view are
different. From mine, which is that of a data consumer and a network
enthusiast, the difference between a simple link and two-way links is huge.
I mean, links are cheap and linked data is just about links. Instead of a
heavy, complex and often empty federated SPAQL query, it would be enough to
ask Wikidata to get the information of DBpedia (I think Wikidata is
intended to contain one day all the DBpedia entities). Just as one will be
able to query Wikidata one day to know the VIAF ID of any writer. I believe
that Wikidata is destined to become a data hub of this kind, but maybe I'm
wrong.

Best regards,

Ettore Rizza

2018-03-06 20:11 GMT+01:00 Sebastian Hellmann <
hellm...@informatik.uni-leipzig.de>:

> Hm, now I am also curious and would like to ask the same question as
> Ettore. What is the policy here?
>
> Viaf has schema.org backlinks, see https://viaf.org/viaf/85312226/rdf.xml
>
> http://www.wikidata.org/entity/Q80;
> />
> Then it's ok to duplicate? because it is not owl:sameAs?
>
> All the best,
> Sebastain
>
>
> On 06.03.2018 20:01, Magnus Sälgö wrote:
>
> If Dbpedia has “same as” then Wikidata doesn’t have to duplicate that
> information you can ask dbpedia what is same as Q7724
>
> Regards
> Magnus Sälgö
> Stockholm, Sweden
>
> 6 mars 2018 kl. 19:49 skrev Ettore RIZZA :
>
> First of all, thank you all for your answers.
>
> @Magnus and Thad: it's a bit what I suspected. Since the URL to WorldCat
> can be rebuilt from the Library of congress authority ID, I guess someone
> thought it would be a duplicate.
>
> But 1) I'm not sure that there is a 1 to 1 mapping between all Worldcat
> Identities and the Library of Congress 2) It would be rather strange that a
> Library of Congress ID would also serve as an ID for a "competitor" (ie
> OCLC, which maintains Worldcat and VIAF) 3) One would then wonder why
> Wikipedia provides both links to the Library of Congress Authority ID and
> Worldcat Identities.
>
> With respect for the fact that Wikidata already contains links to VIAF and
> that VIAF contains links to Worldcat Identities, this transitivity
> reasoning could apply to many other Authority IDs, I think.
>
> @Sebastian: Il would be great! I'll follow this project closely, just as
> I'm already following your papers
> .
> And it is precisely because I know that there is a desire for
> "rapprochement" on both sides that I asked why there is absolutely nothing
> in Wikidata that links to DBpedia (or Yago), whereas DBpedia contains a lot
> of owl: sameAs to Wikidata. All this must have been discussed somewhere I
> suppose. Still, I do not even find a property proposal for "DBpedia link".
>
> 2018-03-06 18:59 GMT+01:00 Sebastian Hellmann  leipzig.de>:
>
>> Hi Ettore,
>>
>> we just released a very early prototype of the new DBpedia:
>>
>> http://88.99.242.78/hdt/en_wiki_de_sv_nl_fr-replaced.nt.bz2
>> 
>>
>> I attached the first 1000 triples. The data is a merge of Wikidata + 5
>> DBpedias from the 5 largest Wikipedia versions. Overall, there are many
>> issues, but we have a test-driven data engineering process combined with
>> Scrum and biweekly releases, next one is on March 15th. The new IDs are
>> also stable by design.
>>
>> We discussed how to effectively reuse all technologies we have for
>> Wikidata and also Wikipedia and are applying with this project at the
>> moment: https://meta.wikimedia.org/wiki/Grants:Project/DBpedia/Globa
>> lFactSync
>> 
>> (Endorsements on the main page and comments on the talk page are
>> welcome).
>>
>> We really hope that the project gets accepted, so we can deploy the
>> technologies behind DBpedia to the Wikiverse, e.g. we found over 900k
>> triples/statements with references in the English Wikipedia's Infoboxes
>> alone.
>>
>> We still have to do documentation and hosting of the new releases, but
>> then it 

Re: [Wikidata] About OCLC and DBpedia Links

[leadsong]

Hi Ettore,
Thank you for raising the point. 

Worldcat pools and federates authorities and identities from many libraries. LoC only does so for the United States. Other national repositories such as the BL and the Bnf also make their way into Worldcat or VIAF. In turn the VIAF authorities should eventually show up in a more carefully curated form as ISNI. This flow involves human intervention so it is not instant. It can take years. 
 

Sent: Tuesday, March 06, 2018 at 1:48 PM
From: "Ettore RIZZA" <ettoreri...@gmail.com>
To: "Discussion list for the Wikidata project" <wikidata@lists.wikimedia.org>
Subject: Re: [Wikidata] About OCLC and DBpedia Links



First of all, thank you all for your answers.

 

@Magnus and Thad: it's a bit what I suspected. Since the URL to WorldCat can be rebuilt from the Library of congress authority ID, I guess someone thought it would be a duplicate. 

 

But 1) I'm not sure that there is a 1 to 1 mapping between all Worldcat Identities and the Library of Congress 2) It would be rather strange that a Library of Congress ID would also serve as an ID for a "competitor" (ie OCLC, which maintains Worldcat and VIAF) 3) One would then wonder why Wikipedia provides both links to the Library of Congress Authority ID and Worldcat Identities.

 

With respect for the fact that Wikidata already contains links to VIAF and that VIAF contains links to Worldcat Identities, this transitivity reasoning could apply to many other Authority IDs, I think.

 

@Sebastian: Il would be great! I'll follow this project closely, just as I'm already following your papers. And it is precisely because I know that there is a desire for "rapprochement" on both sides that I asked why there is absolutely nothing in Wikidata that links to DBpedia (or Yago), whereas DBpedia contains a lot of owl: sameAs to Wikidata. All this must have been discussed somewhere I suppose. Still, I do not even find a property proposal for "DBpedia link". 


 
2018-03-06 18:59 GMT+01:00 Sebastian Hellmann <hellm...@informatik.uni-leipzig.de>:



Hi Ettore,

we just released a very early prototype of the new DBpedia:

http://88.99.242.78/hdt/en_wiki_de_sv_nl_fr-replaced.nt.bz2

I attached the first 1000 triples. The data is a merge of Wikidata + 5  DBpedias from the 5 largest Wikipedia versions. Overall, there are many issues, but we have a test-driven data engineering process combined with Scrum and biweekly releases, next one is on March 15th. The new IDs are also stable by design.

We discussed how to effectively reuse all technologies we have for Wikidata and also Wikipedia and are applying with this project at the moment: https://meta.wikimedia.org/wiki/Grants:Project/DBpedia/GlobalFactSync
(Endorsements on the main page and comments on the talk page are welcome).

We really hope that the project gets accepted, so we can deploy the technologies behind DBpedia to the Wikiverse, e.g. we found over 900k triples/statements with references in the English Wikipedia's Infoboxes alone.

We still have to do documentation and hosting of the new releases, but then it would indeed be a good time to add the links to DBpedia, if nobody objects. Also some people mentioned that we could load the DBpedia Ontology into Wikidata to provide an alternate class hierarchy. In DBpedia we loaded 5 or 6 classification schemes (Yago, Umbel, etc.), which are useful for different kind of queries.

 
All the best,
Sebastian



 
 
On 06.03.2018 18:14, Ettore RIZZA wrote:







Dear all,

 

I asked myself a series of questions about the links between Wikidata and other knowledge/data bases, namely those of OCLC and DBpedia. For example:

 

- Why Wikidata has no property "Worldcat Identities" while the English edition of Wikipedia systematically mentions this identity (when it exists) in its section "Autorithy control"  ? 

 

- Why do VIAF links to all editions of Wikipedia, but not (simply) to Wikidata ?

 

- Why is there no link to DBpedia when the opposite is true ?

 

These questions may seem very different from each other, but they ultimately concern a common subject and are all very basic. I suspect they had to be discussed somewhere, maybe at the dawn of Wikidata. However, I find nothing in the archives of this Newsletter, nor in the discussions on Wikidata. 

 

Could someone point me to some documentation on these issues ? 

 

Cheers,

 

Ettore Rizza

 

 



___Wikidata mailing listWikidata@lists.wikimedia.orghttps://lists.wikimedia.org/mailman/listinfo/wikidata

 

--
All the best,
Sebastian Hellmann

Director of Knowledge Integration and Linked Data Technologies (KILT) Competence Center
at the Institute for Applied Informatics (InfAI) at Leipzig University
Executive Director of the DBpedia Association
Projects: http://dbpedia.org, http://nlp2rdf.org, http://linguistics.okfn.org, https://www.w3.org/com

Re: [Wikidata] About OCLC and DBpedia Links

[Sebastian Hellmann]

Hm, now I am also curious and would like to ask the same question as 
Ettore. What is the policy here?


Viaf has schema.org backlinks, see https://viaf.org/viaf/85312226/rdf.xml

http://www.wikidata.org/entity/Q80"/>

Then it's ok to duplicate? because it is not owl:sameAs?

All the best,
Sebastain

On 06.03.2018 20:01, Magnus Sälgö wrote:
If Dbpedia has “same as” then Wikidata doesn’t have to duplicate that 
information you can ask dbpedia what is same as Q7724


Regards
Magnus Sälgö
Stockholm, Sweden

6 mars 2018 kl. 19:49 skrev Ettore RIZZA >:



First of all, thank you all for your answers.

@Magnus and Thad: it's a bit what I suspected. Since the URL to 
WorldCat can be rebuilt from the Library of congress authority ID, I 
guess someone thought it would be a duplicate.


But 1) I'm not sure that there is a 1 to 1 mapping between all 
Worldcat Identities and the Library of Congress 2) It would be rather 
strange that a Library of Congress ID would also serve as an ID for a 
"competitor" (ie OCLC, which maintains Worldcat and VIAF) 3) One 
would then wonder why Wikipedia provides both links to the Library of 
Congress Authority ID and Worldcat Identities.


With respect for the fact that Wikidata already contains links to 
VIAF and that VIAF contains links to Worldcat Identities, this 
transitivity reasoning could apply to many other Authority IDs, I think.


@Sebastian: Il would be great! I'll follow this project closely, just 
as I'm already following your papers 
. 
And it is precisely because I know that there is a desire for 
"rapprochement" on both sides that I asked why there is absolutely 
nothing in Wikidata that links to DBpedia (or Yago), whereas DBpedia 
contains a lot of owl: sameAs to Wikidata. All this must have been 
discussed somewhere I suppose. Still, I do not even find a property 
proposal for "DBpedia link".


2018-03-06 18:59 GMT+01:00 Sebastian Hellmann 
>:


Hi Ettore,

we just released a very early prototype of the new DBpedia:

http://88.99.242.78/hdt/en_wiki_de_sv_nl_fr-replaced.nt.bz2



I attached the first 1000 triples. The data is a merge of
Wikidata + 5  DBpedias from the 5 largest Wikipedia versions.
Overall, there are many issues, but we have a test-driven data
engineering process combined with Scrum and biweekly releases,
next one is on March 15th. The new IDs are also stable by design.

We discussed how to effectively reuse all technologies we have
for Wikidata and also Wikipedia and are applying with this
project at the moment:
https://meta.wikimedia.org/wiki/Grants:Project/DBpedia/GlobalFactSync



(Endorsements on the main page and comments on the talk page are
welcome).

We really hope that the project gets accepted, so we can deploy
the technologies behind DBpedia to the Wikiverse, e.g. we found
over 900k triples/statements with references in the English
Wikipedia's Infoboxes alone.

We still have to do documentation and hosting of the new
releases, but then it would indeed be a good time to add the
links to DBpedia, if nobody objects. Also some people mentioned
that we could load the DBpedia Ontology into Wikidata to provide
an alternate class hierarchy. In DBpedia we loaded 5 or 6
classification schemes (Yago, Umbel, etc.), which are useful for
different kind of queries.


All the best,
Sebastian




On 06.03.2018 18:14, Ettore RIZZA wrote:

Dear all,

I asked myself a series of questions about the links between
Wikidata and other knowledge/data bases, namely those of OCLC
and DBpedia. For example:

- Why Wikidata has no property "Worldcat Identities

"
while the 

Re: [Wikidata] About OCLC and DBpedia Links

[Sebastian Hellmann]

Hi Ettore,

On 06.03.2018 19:48, Ettore RIZZA wrote:
@Sebastian: Il would be great! I'll follow this project closely, just 
as I'm already following your papers 
. And it is 
precisely because I know that there is a desire for "rapprochement" on 
both sides that I asked why there is absolutely nothing in Wikidata 
that links to DBpedia (or Yago), whereas DBpedia contains a lot of 
owl: sameAs to Wikidata. All this must have been discussed somewhere I 
suppose. Still, I do not even find a property proposal for "DBpedia 
link". 


Thanks, Ali (who volunteered to do biweekly Wikidata-DBpedia 
extractions) and Dimitris should get most of the credit for the paper.


We as DBpedia would really like to contribute more to Wikidata, but all 
developers are busy with coding DBpedia improvements and the community 
is more concerned with their own interests and we didn't find a 
volunteer who committed to focusing on closing the gaps between the 
projects (it is quite a lot of work, but worth it). Hence the 
application for the developer in GlobalFactSync[1] as we really need 
someone to focus on porting technologies to Wikimedia and transition the 
core data from Wikipedia to Wikidata via DBpedia as a transparent layer.



[1] https://meta.wikimedia.org/wiki/Grants:Project/DBpedia/GlobalFactSync


--
All the best,
Sebastian Hellmann

Director of Knowledge Integration and Linked Data Technologies (KILT) 
Competence Center

at the Institute for Applied Informatics (InfAI) at Leipzig University
Executive Director of the DBpedia Association
Projects: http://dbpedia.org, http://nlp2rdf.org, 
http://linguistics.okfn.org, https://www.w3.org/community/ld4lt 


Homepage: http://aksw.org/SebastianHellmann
Research Group: http://aksw.org
___
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Wikidata@lists.wikimedia.org
https://lists.wikimedia.org/mailman/listinfo/wikidata

Re: [Wikidata] About OCLC and DBpedia Links

[Magnus Sälgö]

If Dbpedia has “same as” then Wikidata doesn’t have to duplicate that 
information you can ask dbpedia what is same as Q7724

Regards
Magnus Sälgö
Stockholm, Sweden

6 mars 2018 kl. 19:49 skrev Ettore RIZZA 
>:

First of all, thank you all for your answers.

@Magnus and Thad: it's a bit what I suspected. Since the URL to WorldCat can be 
rebuilt from the Library of congress authority ID, I guess someone thought it 
would be a duplicate.

But 1) I'm not sure that there is a 1 to 1 mapping between all Worldcat 
Identities and the Library of Congress 2) It would be rather strange that a 
Library of Congress ID would also serve as an ID for a "competitor" (ie OCLC, 
which maintains Worldcat and VIAF) 3) One would then wonder why Wikipedia 
provides both links to the Library of Congress Authority ID and Worldcat 
Identities.

With respect for the fact that Wikidata already contains links to VIAF and that 
VIAF contains links to Worldcat Identities, this transitivity reasoning could 
apply to many other Authority IDs, I think.

@Sebastian: Il would be great! I'll follow this project closely, just as I'm 
already following your 
papers.
 And it is precisely because I know that there is a desire for "rapprochement" 
on both sides that I asked why there is absolutely nothing in Wikidata that 
links to DBpedia (or Yago), whereas DBpedia contains a lot of owl: sameAs to 
Wikidata. All this must have been discussed somewhere I suppose. Still, I do 
not even find a property proposal for "DBpedia link".

2018-03-06 18:59 GMT+01:00 Sebastian Hellmann 
>:

Hi Ettore,

we just released a very early prototype of the new DBpedia:

http://88.99.242.78/hdt/en_wiki_de_sv_nl_fr-replaced.nt.bz2

I attached the first 1000 triples. The data is a merge of Wikidata + 5  
DBpedias from the 5 largest Wikipedia versions. Overall, there are many issues, 
but we have a test-driven data engineering process combined with Scrum and 
biweekly releases, next one is on March 15th. The new IDs are also stable by 
design.

We discussed how to effectively reuse all technologies we have for Wikidata and 
also Wikipedia and are applying with this project at the moment: 
https://meta.wikimedia.org/wiki/Grants:Project/DBpedia/GlobalFactSync

(Endorsements on the main page and comments on the talk page are welcome).

We really hope that the project gets accepted, so we can deploy the 
technologies behind DBpedia to the Wikiverse, e.g. we found over 900k 
triples/statements with references in the English Wikipedia's Infoboxes alone.

We still have to do documentation and hosting of the new releases, but then it 
would indeed be a good time to add the links to DBpedia, if nobody objects. 
Also some people mentioned that we could load the DBpedia Ontology into 
Wikidata to provide an alternate class hierarchy. In DBpedia we loaded 5 or 6 
classification schemes (Yago, Umbel, etc.), which are useful for different kind 
of queries.


All the best,
Sebastian




On 06.03.2018 18:14, Ettore RIZZA wrote:
Dear all,

I asked myself a series of questions about the links between Wikidata and other 
knowledge/data bases, namely those of OCLC and DBpedia. For example:

- Why Wikidata has no property "Worldcat 
Identities"
 while the English edition of Wikipedia systematically mentions this identity 
(when it exists) in its section "Autorithy control"  ?

- Why do VIAF links to all editions of Wikipedia, but not (simply) to Wikidata ?

- Why is there no link to DBpedia when the opposite is true ?

These questions may seem very different from each other, but they ultimately 
concern a common subject and are all very basic. I suspect they had to be 
discussed somewhere, maybe at the dawn of Wikidata. However, I find nothing 

Re: [Wikidata] About OCLC and DBpedia Links

[Ettore RIZZA]

First of all, thank you all for your answers.

@Magnus and Thad: it's a bit what I suspected. Since the URL to WorldCat
can be rebuilt from the Library of congress authority ID, I guess someone
thought it would be a duplicate.

But 1) I'm not sure that there is a 1 to 1 mapping between all Worldcat
Identities and the Library of Congress 2) It would be rather strange that a
Library of Congress ID would also serve as an ID for a "competitor" (ie
OCLC, which maintains Worldcat and VIAF) 3) One would then wonder why
Wikipedia provides both links to the Library of Congress Authority ID and
Worldcat Identities.

With respect for the fact that Wikidata already contains links to VIAF and
that VIAF contains links to Worldcat Identities, this transitivity
reasoning could apply to many other Authority IDs, I think.

@Sebastian: Il would be great! I'll follow this project closely, just as
I'm already following your papers
. And it is
precisely because I know that there is a desire for "rapprochement" on both
sides that I asked why there is absolutely nothing in Wikidata that links
to DBpedia (or Yago), whereas DBpedia contains a lot of owl: sameAs to
Wikidata. All this must have been discussed somewhere I suppose. Still, I
do not even find a property proposal for "DBpedia link".

2018-03-06 18:59 GMT+01:00 Sebastian Hellmann <
hellm...@informatik.uni-leipzig.de>:

> Hi Ettore,
>
> we just released a very early prototype of the new DBpedia:
>
> http://88.99.242.78/hdt/en_wiki_de_sv_nl_fr-replaced.nt.bz2
>
> I attached the first 1000 triples. The data is a merge of Wikidata + 5
> DBpedias from the 5 largest Wikipedia versions. Overall, there are many
> issues, but we have a test-driven data engineering process combined with
> Scrum and biweekly releases, next one is on March 15th. The new IDs are
> also stable by design.
>
> We discussed how to effectively reuse all technologies we have for
> Wikidata and also Wikipedia and are applying with this project at the
> moment: https://meta.wikimedia.org/wiki/Grants:Project/DBpedia/
> GlobalFactSync
> (Endorsements on the main page and comments on the talk page are welcome).
>
> We really hope that the project gets accepted, so we can deploy the
> technologies behind DBpedia to the Wikiverse, e.g. we found over 900k
> triples/statements with references in the English Wikipedia's Infoboxes
> alone.
>
> We still have to do documentation and hosting of the new releases, but
> then it would indeed be a good time to add the links to DBpedia, if nobody
> objects. Also some people mentioned that we could load the DBpedia Ontology
> into Wikidata to provide an alternate class hierarchy. In DBpedia we loaded
> 5 or 6 classification schemes (Yago, Umbel, etc.), which are useful for
> different kind of queries.
>
>
> All the best,
> Sebastian
>
>
>
>
> On 06.03.2018 18:14, Ettore RIZZA wrote:
>
> Dear all,
>
> I asked myself a series of questions about the links between Wikidata and
> other knowledge/data bases, namely those of OCLC and DBpedia. For example:
>
> - Why Wikidata has no property "Worldcat Identities
> " while the English edition of Wikipedia
> systematically mentions this identity (when it exists) in its section
> "Autorithy control"  ?
>
> - Why do VIAF links to all editions of Wikipedia, but not (simply) to
> Wikidata ?
>
> - Why is there no link to DBpedia when the opposite is true ?
>
> These questions may seem very different from each other, but they
> ultimately concern a common subject and are all very basic. I suspect they
> had to be discussed somewhere, maybe at the dawn of Wikidata. However, I
> find nothing in the archives of this Newsletter, nor in the discussions on
> Wikidata.
>
> Could someone point me to some documentation on these issues ?
>
> Cheers,
>
> Ettore Rizza
>
>
> ___
> Wikidata mailing 
> listWikidata@lists.wikimedia.orghttps://lists.wikimedia.org/mailman/listinfo/wikidata
>
>
> --
> All the best,
> Sebastian Hellmann
>
> Director of Knowledge Integration and Linked Data Technologies (KILT)
> Competence Center
> at the Institute for Applied Informatics (InfAI) at Leipzig University
> Executive Director of the DBpedia Association
> Projects: http://dbpedia.org, http://nlp2rdf.org,
> http://linguistics.okfn.org, https://www.w3.org/community/ld4lt
> 
> Homepage: http://aksw.org/SebastianHellmann
> Research Group: http://aksw.org
>
> ___
> Wikidata mailing list
> Wikidata@lists.wikimedia.org
> https://lists.wikimedia.org/mailman/listinfo/wikidata
>
>
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Re: [Wikidata] About OCLC and DBpedia Links

[Sebastian Hellmann]

Hi Ettore,

we just released a very early prototype of the new DBpedia:

http://88.99.242.78/hdt/en_wiki_de_sv_nl_fr-replaced.nt.bz2

I attached the first 1000 triples. The data is a merge of Wikidata + 5  
DBpedias from the 5 largest Wikipedia versions. Overall, there are many 
issues, but we have a test-driven data engineering process combined with 
Scrum and biweekly releases, next one is on March 15th. The new IDs are 
also stable by design.


We discussed how to effectively reuse all technologies we have for 
Wikidata and also Wikipedia and are applying with this project at the 
moment: 
https://meta.wikimedia.org/wiki/Grants:Project/DBpedia/GlobalFactSync


(Endorsements on the main page and comments on the talk page are welcome).

We really hope that the project gets accepted, so we can deploy the 
technologies behind DBpedia to the Wikiverse, e.g. we found over 900k 
triples/statements with references in the English Wikipedia's Infoboxes 
alone.


We still have to do documentation and hosting of the new releases, but 
then it would indeed be a good time to add the links to DBpedia, if 
nobody objects. Also some people mentioned that we could load the 
DBpedia Ontology into Wikidata to provide an alternate class hierarchy. 
In DBpedia we loaded 5 or 6 classification schemes (Yago, Umbel, etc.), 
which are useful for different kind of queries.



All the best,
Sebastian



On 06.03.2018 18:14, Ettore RIZZA wrote:

Dear all,

I asked myself a series of questions about the links between Wikidata 
and other knowledge/data bases, namely those of OCLC and DBpedia. For 
example:


- Why Wikidata has no property "Worldcat Identities 
" while the English edition of 
Wikipedia systematically mentions this identity (when it exists) in 
its section "Autorithy control" ?


- Why do VIAF links to all editions of Wikipedia, but not (simply) to 
Wikidata ?


- Why is there no link to DBpedia when the opposite is true ?

These questions may seem very different from each other, but they 
ultimately concern a common subject and are all very basic. I suspect 
they had to be discussed somewhere, maybe at the dawn of Wikidata. 
However, I find nothing in the archives of this Newsletter, nor in the 
discussions on Wikidata.


Could someone point me to some documentation on these issues ?

Cheers,

Ettore Rizza


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--
All the best,
Sebastian Hellmann

Director of Knowledge Integration and Linked Data Technologies (KILT) 
Competence Center

at the Institute for Applied Informatics (InfAI) at Leipzig University
Executive Director of the DBpedia Association
Projects: http://dbpedia.org, http://nlp2rdf.org, 
http://linguistics.okfn.org, https://www.w3.org/community/ld4lt 


Homepage: http://aksw.org/SebastianHellmann
Research Group: http://aksw.org
@prefix rdf:  .


a , ,  ;
 "Categoria:Panagyurishte"@it, "Categorie:Panagyurishte"@nl, "Category:Panagyurishte"@en, "Category:パナギュリシテ"@ja, "Categoría:Panaguiúrishte"@es, "Catégorie:Panagyurichté"@fr, "Kategori:Panagjurisjte"@sv, "Kategorie:Panagjurischte"@de, "Kategorie:Panagyurishte"@cs, "Kategória:Panagyurishte"@sk, "Panagjurischte"@de, "Panagyurishte"@en, "Panagyurishte"@pl, "Категория:Панагюриште"@ru, "Категория:Панагюрище"@bg, "Категорија:Панаѓуриште"@mk ;
  .


  ;
 "1937-4-11"^^ ;
  ;
 "2016-3-17"^^ ;
  ;
a , , , , , , , , ,  ;
 "Tatyana Kolotilshchikova"@en, "Tatyana Kolotilshchikova"@es, "Tatyana Kolotilshchikova"@fr, "Tatyana Kolotilshchikova"@in, "Tatyana 

Re: [Wikidata] About OCLC and DBpedia Links

[Thad Guidry]

Technically, there's 2 :-)

- Library of Congress authority ID (P244)
: Library of Congress ID for
authority control for persons, works, organizations and subject headings
(for book editions use P1144). Format: 1-2 specific letters followed by
8-10 digits (see regex).

- LCOC LCCN (bibliographic) (P1144)
: Library of Congress ID for
bibliographic records (for books, serials, maps, music, video, etc only;
for names use P244)

-Thad
+ThadGuidry 



On Tue, Mar 6, 2018 at 11:36 AM Magnus Sälgö  wrote:

> If you have an external identifier you often can find the record you want
>
>  Worldcat can use the lccn property
>
> See http://worldcat.org/identities/lccn-n79005597/
> That is Wikidata Q7724  that has
> property
> P244 lcauth
> https://m.wikidata.org/wiki/Property:P244
>
> If you check VIAF you see The Wikidata record
> https://viaf.org/viaf/54154627/ and also Lccn 79005597
> https://viaf.org/processed/LC%7Cn%20%2079005597
>
> You can also use the Lccn number and find the Wikidata record
> https://tools.wmflabs.org/sqid/#/view?find=P244:n79005597
>
> Hope it make sense its loosely coupled system and then it maybe is not
> the best structure.
>
> Regards
> Magnus Sälgö
> Stockholm, Sweden
>
> 6 mars 2018 kl. 18:15 skrev Ettore RIZZA :
>
> Dear all,
>
> I asked myself a series of questions about the links between Wikidata and
> other knowledge/data bases, namely those of OCLC and DBpedia. For example:
>
> - Why Wikidata has no property "Worldcat Identities
> "
> while the English edition of Wikipedia systematically mentions this
> identity (when it exists) in its section "Autorithy control"  ?
>
> - Why do VIAF links to all editions of Wikipedia, but not (simply) to
> Wikidata ?
>
> - Why is there no link to DBpedia when the opposite is true ?
>
> These questions may seem very different from each other, but they
> ultimately concern a common subject and are all very basic. I suspect they
> had to be discussed somewhere, maybe at the dawn of Wikidata. However, I
> find nothing in the archives of this Newsletter, nor in the discussions on
> Wikidata.
>
> Could someone point me to some documentation on these issues ?
>
> Cheers,
>
> Ettore Rizza
>
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Re: [Wikidata] About OCLC and DBpedia Links

[Magnus Sälgö]

If you have an external identifier you often can find the record you want

 Worldcat can use the lccn property

See http://worldcat.org/identities/lccn-n79005597/
That is Wikidata Q7724 that has property
P244 lcauth
https://m.wikidata.org/wiki/Property:P244

If you check VIAF you see The Wikidata record https://viaf.org/viaf/54154627/ 
and also Lccn 79005597
https://viaf.org/processed/LC%7Cn%20%2079005597

You can also use the Lccn number and find the Wikidata record
https://tools.wmflabs.org/sqid/#/view?find=P244:n79005597

Hope it make sense its loosely coupled system and then it maybe is not the 
best structure.

Regards
Magnus Sälgö
Stockholm, Sweden

6 mars 2018 kl. 18:15 skrev Ettore RIZZA 
>:

Dear all,

I asked myself a series of questions about the links between Wikidata and other 
knowledge/data bases, namely those of OCLC and DBpedia. For example:

- Why Wikidata has no property "Worldcat 
Identities"
 while the English edition of Wikipedia systematically mentions this identity 
(when it exists) in its section "Autorithy control"  ?

- Why do VIAF links to all editions of Wikipedia, but not (simply) to Wikidata ?

- Why is there no link to DBpedia when the opposite is true ?

These questions may seem very different from each other, but they ultimately 
concern a common subject and are all very basic. I suspect they had to be 
discussed somewhere, maybe at the dawn of Wikidata. However, I find nothing in 
the archives of this Newsletter, nor in the discussions on Wikidata.

Could someone point me to some documentation on these issues ?

Cheers,

Ettore Rizza
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