2013/5/9 Brian Wolff <bawolff(a)gmail.com>
From what I hear wikidata phase 3 is going to
basically be support for
inline queries. Details are vauge but if they support the typical types of
queries you associate with semantic networks - there is category
intersection right there.
Right.
If any of the wikidata folk could comment on what sort
of queries are
planned for phase 3, performance/scaling considerations, technologies being
considered (triple store?) Id be very interested in hearing. (I recognize
that future plans may not exist yet)
For now we aim at "property value" or "property
value-restriction" type
queries, and their intersections, i.e.
"lives in -> California"
"born -> before 1980"
"lives in -> California AND born -> before 1980"
We are considering several different technologies, and we had a number of
discussions already with a number of people.
My current gut feeling, based on the limited tests we did so far is, that
we start with our normal SQL setup for the first two type of queries, and
that we extend to Solr for the third type of queries (i.e. intersections).
more generally it would be interesting to know the
performance
characteristics of SPARQL type query systems, since people seem to be
talking about them. Are they a non starter or could they be feasible?
We are currently not aiming to provide an unrestricted SPARQL endpoint.
But, I know that a few other organizations are very interested in setting
that up. If it shows that it would be feasible for us, I'd be very happy if
we did it too.
Semantic and efficient are not words I associate with
each other, but that
is due to rumour not actual data. (Although my brief googling doesnt
exactly look promising)
That's indeed a rumor, but leads to another discussion :)
Cheers,
Denny
-bawolff
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