- From: Benjamin Nowack <bnowack@semsol.com>
- Date: Thu, 22 Apr 2010 10:56:38 +0200
- To: Semantic Web <semantic-web@w3.org>
Hi, I'm working on a faceted browser for remote SPARQL APIs and wonder about a basic query structure that can work with a variety of stores/endpoints. Below is a sample entry query that I could successfully run against * the data.gov.uk (i.e. Talis) stores * ARQ/Jena * ARC2 * at least one D2R endpoint (DailyMed) Virtuoso seems to accept the query, but I didn't find an endpoint that could return results before timing out (I only tried the 2 huge ones, though). If anyone knows of further store APIs that support the query (or maybe a variation), I'd be very happy about a quick reply. Here's the query: SELECT ?facet (COUNT(?val) as ?vc) WHERE { ?id a ?val . # (dummy-ish) filter patterns ?id ?facet ?val . # facet patterns } GROUP BY ?facet ?val ORDER BY DESC(?vc) LIMIT 25 Cheers, Benji -- Benjamin Nowack http://bnode.org/ http://semsol.com/
Received on Thursday, 22 April 2010 08:57:09 UTC