- From: Keith Alexander <keithalexander@keithalexander.co.uk>
- Date: Wed, 4 Jul 2012 08:13:39 +0100
- To: Heiko Paulheim <paulheim@ke.tu-darmstadt.de>
- Cc: public-lod@w3.org, semantic-web@w3.org
On Wed, Jul 4, 2012 at 7:45 AM, Heiko Paulheim <paulheim@ke.tu-darmstadt.de> wrote: > Hi all, > > I am wondering whether there is a way of finding a SPARQL endpoint for an > LOD URI, i.e., a function f that behaves like > f(<http://dbpedia.org/resource/Darmstadt>) = <http://dbpedia.org/sparql> > > TimBL's design issues document [1] says: > "To make the data be effectively linked, someone who only has the URI of > something must be able to find their way the SPARQL endpoint. [...] > Vocabularies for doing this have not yet been standardized." > > Is that still the state of affairs? Are there any practical workarounds? > Hi, http://www.w3.org/TR/void/#discovery describes methods for publishers to let their dataset descriptions be discovered via a Linked Data URI. The publisher can provide a 'back link' in the RDF they return from the RDF document, to the dataset URI (which then provides a link to the SPARQL endpoint) eg: <thing> foaf:isPrimaryTopicOf <document> . <document> void:inDataset <dataset> . Or the publisher can make their dataset description available at {their domain}/.well-known/void Sadly I am not sure how wide-spread either of those are amongst dataset publishers. As a consumer, you could try going to: http://dsi.lod-cloud.net/sparql and querying for PREFIX void: <http://rdfs.org/ns/void#> select distinct ?dataset ?sparql where { ?dataset void:uriSpace ?urispace ; void:sparqlEndpoint ?sparql . filter(regex('{your URI}', ?urispace)) } HTH Keith > Best, > Heiko > > [1] http://www.w3.org/DesignIssues/LinkedData.html > > -- > Dr. Heiko Paulheim > Knowledge Engineering Group > Technische Universität Darmstadt > Phone: +49 6151 16 6634 > Fax: +49 6151 16 5482 > http://www.ke.tu-darmstadt.de/staff/heiko-paulheim > >
Received on Wednesday, 4 July 2012 07:14:11 UTC