James Heald <j.heald@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.

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