Hi Osma,
re. adding missing items, I've made good experiences with creating input files for
Quickstatements2 (see
https://github.com/zbw/repec-ras/blob/master/bin/create_missing_wikidata.pl). I've
discussed how to best do this in the Wikidata Project Chat before, and received valuable
advice.
(
https://www.wikidata.org/wiki/Wikidata:Project_chat/Archive/2017/05#Source_…)
Feel free to ask for further information, and all the best, Joachim
-----Ursprüngliche Nachricht-----
Von: Wikidata [mailto:wikidata-bounces@lists.wikimedia.org] Im Auftrag von
Osma Suominen
Gesendet: Montag, 21. August 2017 11:07
An: Discussion list for the Wikidata project.
Betreff: [Wikidata] Some Mix'n'match mappings not stored in Wikidata?
Hi,
We're more than halfway through mapping YSO places to Wikidata. Most of
the remaining are places that don't exist in Wikidata, and adding them is quite
labor-intensive so we will have to consider our strategy.
Anyway, I did some checking of what remains unmapped and noticed a
potential problem: some mappings for places that we have mapped using
Mix'n'match have not actually been stored in Wikidata. For example Q36
Poland ("Puola" in YSO Places) is such a case. In Mix'n'match it is
shown as
manually matched (see attached screenshot), but in Wikidata the
corresponding YSO ID property doesn't actually exist for the entity. I checked
the change history of the Q36 entity and couldn't find anything relevant there,
so it seems that the mapping was never stored in Wikidata. Maybe there was a
transient error of some kind?
Another such case was Q1754 Stockholm ("Tukholma" in YSO places). But for
that one we removed the existing mapping in Mix'n'match and set it again, and
now it is properly stored in Wikidata.
Mix'n'match currently reports 4228 mappings for YSO places, while a SPARQL
query for the Wikidata endpoint returns 4221 such mappings. So I suspect that
this only affects a small number of entities.
Is it possible to compare the Mix'n'match mappings with what actually exists in
Wikidata, and somehow re-sync them? Or just to get the mappings out from
Mix'n'match and compare them with what exists in Wikidata, so that the few
missing mappings may be added there manually?
Thanks,
Osma
--
Osma Suominen
D.Sc. (Tech), Information Systems Specialist National Library of Finland P.O. Box
26 (Kaikukatu 4)
00014 HELSINGIN YLIOPISTO
Tel. +358 50 3199529
osma.suominen(a)helsinki.fi
http://www.nationallibrary.fi