DBpedia has the category data in RDF. The last release of DBpedia also included Wikidata - it should be possible to query the combined dataset there.


On Thu, Oct 6, 2016, 19:47 Thad Guidry <thadguidry@gmail.com> wrote:
Cool.  Yeap, you got the idea now.

OK, We'll stay tuned for a future new Service !

Schema.org and Google and the World thank you Stas :)


On Thu, Oct 6, 2016 at 8:39 PM Stas Malyshev <smalyshev@wikimedia.org> wrote:
Hi!

> This is what I was thinking would have already been integrated into
> Wikidata somehow, somewhere, ideally as a SERVICE to call in SPARQL if
> there were any Category Labels , maybe another serviceParam for the
> label Service that could take another serviceParam to retrieve the
> subcategories ?

Right now, we do not support calls out to external services, due to
security issues it may produce. However, making limited API to
specifically mediawiki API may be possible, it's actually an idea we
haven't considered before and may be possible to do.
Needs some thinking though, so don't expect it to be done by next week
:) but interesting, I'll look into it.

We probably will need to use generator since we'd need Wikidata IDs, but
something like this:

/w/api.php?action=query&format=json&prop=pageprops&generator=categorymembers&ppprop=wikibase_item&gcmtitle=Category%3AParking&gcmprop=ids%7Ctitle&gcmtype=subcat

should work. It needs some code to be able to properly build and consume
queries, but not impossible.

--
Stas Malyshev
smalyshev@wikimedia.org

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