[Wikidata-l] freebase id - wikidata id
Hi all, I was wondering if anyone had any advice for mapping a set of Freebase identifiers to WikiData identifiers. I’m looking to port over a few thousand entities in use in an application since Freebase is going to be shut off next month. My apologies if this is a rudimentary question. I took a quick look at the API [1] and didn’t see an obvious way of doing it. Or is the WikiData Query API [2] a better fit for this? I was able to figure out how to do a lookup based on the FreebaseID, https://wdq.wmflabs.org/api?q=string[646:'/m/04hcw'] Any tips or pointers would be appreciated. //Ed [1] https://www.wikidata.org/w/api.php [2] https://wdq.wmflabs.org/api_documentation.html signature.asc Description: Message signed with OpenPGP using GPGMail ___ Wikidata-l mailing list Wikidata-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-l
Re: [Wikidata-l] freebase id - wikidata id
Hi Ed. In addition to the API(s), there's a specific Freebase-Wikidata mapping dump which is a little old (18 months), but very compact and easy to work with. The identifiers are likely to be pretty stable, so if the entities you are interested in have been around for a while, it might be easier to work with. https://developers.google.com/freebase/data#freebase-wikidata-mappings The three hits for your sample topic make me suspicious about the quality of the mapping though $ curl http://storage.googleapis.com/freebase-public/fb2w.nt.gz | zgrep 'm.04hcw' http://rdf.freebase.com/ns/m.04hcw http://www.w3.org/2002/07/owl#sameAs http://www.wikidata.org/entity/Q9391 . http://rdf.freebase.com/ns/m.04hcw4 http://www.w3.org/2002/07/owl#sameAs http://www.wikidata.org/entity/Q1579293 . http://rdf.freebase.com/ns/m.04hcwh http://www.w3.org/2002/07/owl#sameAs http://www.wikidata.org/entity/Q1347932 . I don't know if this dump was used as the basis for the identifiers loaded into Wikidata, but you might want to consider building in some safeguards like double checking that names match -- whatever lookup scheme you decide to use. Tom On Sun, May 17, 2015 at 10:23 AM, Ed Summers e...@pobox.com wrote: Hi all, I was wondering if anyone had any advice for mapping a set of Freebase identifiers to WikiData identifiers. I’m looking to port over a few thousand entities in use in an application since Freebase is going to be shut off next month. My apologies if this is a rudimentary question. I took a quick look at the API [1] and didn’t see an obvious way of doing it. Or is the WikiData Query API [2] a better fit for this? I was able to figure out how to do a lookup based on the FreebaseID, https://wdq.wmflabs.org/api?q=string[646:'/m/04hcw'] Any tips or pointers would be appreciated. //Ed [1] https://www.wikidata.org/w/api.php [2] https://wdq.wmflabs.org/api_documentation.html ___ Wikidata-l mailing list Wikidata-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-l ___ Wikidata-l mailing list Wikidata-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-l
Re: [Wikidata-l] freebase id - wikidata id
Oops! Never mind! On Sun, May 17, 2015 at 5:28 PM, Tom Morris tfmor...@gmail.com wrote: The three hits for your sample topic make me suspicious about the quality of the mapping though $ curl http://storage.googleapis.com/freebase-public/fb2w.nt.gz | zgrep 'm.04hcw' http://rdf.freebase.com/ns/m.04hcw http://www.w3.org/2002/07/owl#sameAs http://www.wikidata.org/entity/Q9391 . http://rdf.freebase.com/ns/m.04hcw4 http://www.w3.org/2002/07/owl#sameAs http://www.wikidata.org/entity/Q1579293 . http://rdf.freebase.com/ns/m.04hcwh http://www.w3.org/2002/07/owl#sameAs http://www.wikidata.org/entity/Q1347932 . Those are prefix matches, of course. A better grep is: $ curl http://storage.googleapis.com/freebase-public/fb2w.nt.gz | zgrep 'm.04hcw' Tom ___ Wikidata-l mailing list Wikidata-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-l
Re: [Wikidata-l] freebase id - wikidata id
On Sun, May 17, 2015 at 4:23 PM, Ed Summers e...@pobox.com wrote: Hi all, I was wondering if anyone had any advice for mapping a set of Freebase identifiers to WikiData identifiers. I’m looking to port over a few thousand entities in use in an application since Freebase is going to be shut off next month. My apologies if this is a rudimentary question. I took a quick look at the API [1] and didn’t see an obvious way of doing it. Or is the WikiData Query API [2] a better fit for this? I was able to figure out how to do a lookup based on the FreebaseID, https://wdq.wmflabs.org/api?q=string[646:'/m/04hcw'] Any tips or pointers would be appreciated. To do this you want to either use Wikidata Query, which you already found, or work on dumps. More about them at https://www.wikidata.org/wiki/Wikidata:Data_access Cheers Lydia -- Lydia Pintscher - http://about.me/lydia.pintscher Product Manager for Wikidata Wikimedia Deutschland e.V. Tempelhofer Ufer 23-24 10963 Berlin www.wikimedia.de Wikimedia Deutschland - Gesellschaft zur Förderung Freien Wissens e. V. Eingetragen im Vereinsregister des Amtsgerichts Berlin-Charlottenburg unter der Nummer 23855 Nz. Als gemeinnützig anerkannt durch das Finanzamt für Körperschaften I Berlin, Steuernummer 27/681/51985. ___ Wikidata-l mailing list Wikidata-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-l
