Is there a JAVA API to the Wikidata Query Service
interface?
- go
https://query.wikidata.org
- select any example ( cats? ) + "Execute query"
- select the *"</> Code"* - and select *"Java" *-> and
check the
generated Java code
Can SPARQL be used to query a dump of Wikidata?
maybe you can setup your own SPARQL service ( check
http://wikiba.se/ )
How to best make such queries (information search) in
terms of query
response time?
for my use case - ( Geodata matching ) I have loaded the data to my
database
* I have downloaded wikidata JSON dump (
*
https://www.wikidata.org/wiki/Wikidata:Database_download#JSON_dumps_(recomm…
*
https://dumps.wikimedia.org/wikidatawiki/entities/
* Filtered the JSON
* And loaded only the relevant elements to the Postgres/PostGIS database.
or you can load to CouchDB
https://github.com/maxlath/import-wikidata-dump-to-couchdb
( or you can check the other tools here:
https://www.wikidata.org/wiki/Wikidata:Tools/For_programmers )
but my use case is very special.
Best,
Imre
Raveesh Meena <raveesh(a)csc.kth.se> ezt írta (időpont: 2019. jan. 24., Cs,
9:17):
> Hi,
>
> I have a set of specific querie that my programme shoukd make to Wikidata.
How to best make such queries (information search) in
terms of query
> response time?
>
> One approach that I am familar is to use APIs, such as Wikidata Toolkit
> API <https://www.mediawiki.org/wiki/Wikidata_Toolkit>, to query documents
> in Wiki and parse each document (and perhaps follow hyperlinks) for
> obtaining the specific feature values. I have tested this, but the queries
> could take seconds. Now there could be many factors responsible for this
> such as internet connection, the scheme for parsing wikidata graph, etc.
>
> Another approach would be to use the Wikidata Query Service
> <https://query.wikidata.org/> and SPARQL queries. This is also slow
> sometimes.
>
> My questions:
>
> - Are there benchmarks on response time performance of Wikidata Query
> Service <https://query.wikidata.org/> SPARQL queries?
> - Is there a JAVA API to the Wikidata Query Service
> <https://query.wikidata.org/> interface?
> - Can SPARQL be used to query a dump of Wikidata?
>
> Thanks and regards
> Raveesh
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