Re: [DBpedia-discussion] DBpedia download vs DBPedia SPARQL data

[Sebastian H. <hel...@in...>]

Hi Denny,

* the old system was like this:

we load from here: http://downloads.dbpedia.org/2016-10/core/

metadata is in 
http://downloads.dbpedia.org/2016-10/core/2016-10_dataid_core.ttl with 
void:sparqlEndpoint     <http://dbpedia.org/sparql> ;


* the new system is here: https://databus.dbpedia.org/dbpedia

There are 6 new releases and the metadata is in the endpoint 
https://databus.dbpedia.org/repo/sparql

Once the collection saving feature  is finished, we will build a 
collection of datasets on the bus, which will then be loaded. It is 
basically a sparql query retrieving the downloadurls like this:

http://dev.dbpedia.org/Data#example-application-virtuoso-docker


So we keep better usage tracing and also better provenance tracking, 
i.e. we hope that the wikidata/wikipedia dumps will be on the databus, 
so we can set prov-o:wasDerivedFrom links.


By the way there is a new fusion dataset: 
https://svn.aksw.org/papers/2019/ISWC_FlexiFusion/public.pdf

So people don need to merge Wikidata and DBpedia manually any more. It 
is prefused.


-- Sebastian



On 31.05.19 21:59, Denny Vrandečić wrote:
> Thank you for the answer!
>
> I don't see how the query solution page that you linked indicates that 
> this is the English Wikipedia extraction. Where does it say that? How 
> can I tell? I am trying to understand, thanks.
>
> Also, when I download the set of English extractions from here,
>
> http://downloads.dbpedia.org/2016-10/core-i18n/en/
>
> particularly this one,
>
> http://downloads.dbpedia.org/2016-10/core-i18n/en/mappingbased_objects_en.ttl.bz2 
>
>
> it is only about 17,467 people with parents, not 20,120, so that 
> dataset seems out of sync with the one in the SPARQL endpoint.
>
> I am curious where do you load the dataset from?
>
> Thank you!
>
>
> On Fri, May 31, 2019 at 11:49 AM Kingsley Idehen 
> <ki...@op... <mailto:ki...@op...>> wrote:
>
>     On 5/31/19 2:23 PM, Denny Vrandečić wrote:
>>     When I query the dbpedia.org/sparql <http://dbpedia.org/sparql>
>>     endpoint asking for "how many people with a parent do you know?",
>>     i.e. select (count (distinct ?p) as ?c) where { ?s dbo:parent ?o
>>     }, I get as the answer 20,120.
>>
>>     Where among the Downloads on wiki.dbpedia.org/downloads-2016-10
>>     <http://wiki.dbpedia.org/downloads-2016-10> can I find the
>>     dataset that the SPARQL endpoint actually serves? Is it the
>>     English Wikipedia-based "Mappingbased" one? Or is t the "Infobox
>>     Properties Mapped"?
>>
>>     Cheers,
>>     Denny
>>
>
>     The query solution page
>     <http://dbpedia.org/sparql?default-graph-uri=&query=prefix+dbo%3A+%3Chttp%3A%2F%2Fdbpedia.org%2Fontology%2F%3E+%0D%0A%0D%0Aselect+%3Fg+%28count+%28distinct+%3Fs%29+as+%3Fc%29%0D%0Awhere+%7B+%0D%0A+++++++%0D%0A+++++++++graph+%3Fg+%7B%3Fs+dbo%3Aparent+%3Fo.%7D%0D%0A%0D%0A+++++%7D%0D%0Agroup+by+%3Fg&format=text%2Fhtml&CXML_redir_for_subjs=121&CXML_redir_for_hrefs=&timeout=30000&debug=on&run=+Run+Query+>
>     indicates this is the English Wikipedia dataset. That's what we've
>     always loaded into the Virtuoso instance from which DBpedia Linked
>     Data and its associated SPARQL endpoint are deployed.
>
>
>     -- 
>     Regards,
>
>     Kingsley Idehen	
>     Founder & CEO
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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 
<http://www.w3.org/community/ld4lt>
Homepage: http://aksw.org/SebastianHellmann
Research Group: http://aksw.org