I note that that version 0.2.5 of the wikidata stand-alone has a new Mediawiki API service.

SELECT * WHERE { SERVICE wikibase:mwapi { bd:serviceParam wikibase:api "Categories" . bd:serviceParam wikibase:endpoint "en.wikipedia.org" . bd:serviceParam mwapi:titles "Albert Einstein" . ?category wikibase:apiOutput mwapi:category . ?title wikibase:apiOutput mwapi:title . } }

This works great on https://query.wikidata.org/, but when I enter it in my local installation, I get an error with this line in my stack trace:

java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: Service URI http://wikiba.se/ontology#mwapi is not allowed

It's not clear to me from reading the link below whether and how this can be made to work on my local installation:

https://www.mediawiki.org/wiki/Wikidata_query_service/User_Manual/MWAPI#Indi....

I would benefit greatly from an example.

This looks like a great feature!

Thanks,

- Eric Scott