James Heald <j.heald(a)ucl.ac.uk> wrote:
The post last autumn said you had 176,000 items
matched to OSM, a very large
proportion of which (at least at that time) had no P31 "instance of", but
you had been able to deduce this from Wikipedia.
Would it be possible to start loading Wikidata with that information -- ie
complete the P31's that were missing?
The code that generates the mappings uses Wikipedia categories, and it makes
some mistakes. Take beaches for example:
http://edwardbetts.com/osm-wikidata/2015-04-18/match_results/Beaches.html
Some of the Wikidata items are about a beach, some about a settlement next to
a beach. All of them are in within a beaches category on Wikipedia. It would
be wrong to say that a settle with a beach is an instance of a beach.
For this reason it probably doesn't make sense to add 'instance of'
statements
automatically.
--
Edward.