How to run SPARQL queries against endpoints using a 3rd party sparql query form?

Question

I want to be able to run the BBC SPARQL examples given on dbtune.org blog but the endpoint that they provide is down. I have tried using http://dbpedia.org/sparql but the query always returns 0 results. The example I am trying to test is (Should return all programmes related to James Bond):

PREFIX po: <http://purl.org/ontology/po/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT ?uri ?label
   WHERE {
     ?uri po:category 
       <http://www.bbc.co.uk/programmes/people/bmFtZS9ib25kLCBqYW1lcyAobm8gcXVhbGlmaWVyKQ#person> ; rdfs:label ?label
}

Note that when I run the query in dbpedia.org/sparql I set the Default Graph URI to http://www.bbc.co.uk/programmes/

Accepted Answer

In order to run the Query from somewhere else you'd need to have access to a client program or web form that passes the Query to an arbitrary remote endpoint.

Some example include (there are others out there if you search around):

Twinkle by Leigh Dodds
Store Manager by myself which is downloadable as part of my dotNetRDF Toolkit

You'd have to read the documentation for a specific client to find out how to configure a remote endpoint.

For my client you'd go File > New Generic Store Manager' and then either selectSPARQL Endpoint` and enter the URL of the endpoint or as the store you're interested in is a Talis Store you can select 'Talis' and enter bbc-backstage as the Store.

Answer 2

2

SPARQL 1.1 has a SERVICE keyword that is useful for defining queries that get data from one or more SPARQL endpoints. Jena ARQ has this already. Also see How to: get data from SPARQL endpoints and save data in a spreadsheet, which provides some examples of using SPARQL SERVICE queries.

See Querying Multiple Repositories for an example.

link

answered 10 Nov '10, 21:54

scotthenninger ♦
7.2k●8●13
accept rate: 18%

edited 11 Nov '10, 17:32