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Re: Finding SPARQL endpoints

From: Michael Brunnbauer <brunni@netestate.de>
Date: Tue, 8 Oct 2013 16:32:09 +0200
To: Hugh Glaser <hg@ecs.soton.ac.uk>
Cc: "semantic-web@w3.org" <semantic-web@w3.org>, "py.vandenbussche@gmail.com" <py.vandenbussche@gmail.com>
Message-ID: <20131008143209.GA3771@netestate.de>

hi all,

I updated my query to handle literals as object of void:sparqlEndpoint.
Starting with http://labs.mondeca.com/endpoint/ends, I can now find 783
endpoints of which 253 are accessible.

http://www.brunni.de/sparqlendpoints.txt
http://www.brunni.de/searchsparqlendpoints.txt

Regards,

Michael Brunnbauer

On Wed, Oct 02, 2013 at 01:56:26PM +0200, Michael Brunnbauer wrote:
> 
> Hello Hugh,
> 
> On Tue, Oct 01, 2013 at 04:29:50PM +0000, Hugh Glaser wrote:
> > Did you know about http://labs.mondeca.com/sparqlEndpointsStatus/ ?
> > If so, can you give us some idea of the different sets or whatever please - I think they have 480 endpoints.
> > Maybe you could helpfully collaborate with Pierre-Yves to get a more comprehensive list between you?
> 
> I see that http://labs.mondeca.com/endpoint/ends is not in my list and will
> rerun my query with that additional endpoint. This should add those 480 
> endpoints to the list - if not already there.
> 
> Unfortunately, my query does not work any more after an update of Fuseki.
> I will have to check if the bug is in the new version or in the old version
> and in my SPARQL query.
> 
> > I notice that quite a few of the (RKB) endpoints are listed as "no", when they are in fact up, and have been all the time.
> 
> Can you give an example ?
> 
> My measurement method is sending this via federation:
> 
>  select ?p where { { ?s ?p ?o } UNION { GRAPH ?g1 { ?s ?p ?o } } } limit 1
> 
> It will not work if the endpoint requires authentication or redirects to a new
> endpoint URL. The named graph part of the query also seems to be unsupported
> by some endpoints. For example, http://citeseer.rkbexplorer.com/sparql/ will
> give me this error message: 
> 
>  SQL error in 'CREATE /* TMP */ TABLE uit (bm integer NOT NULL) 
> 
> Should I remove the named graph part ? How many endpoints are there in the 
> wild containing useful information in named graphs ?
> 
> Regards,
> 
> Michael Brunnbauer
> 
> -- 
> ++  Michael Brunnbauer
> ++  netEstate GmbH
> ++  Geisenhausener Straße 11a
> ++  81379 München
> ++  Tel +49 89 32 19 77 80
> ++  Fax +49 89 32 19 77 89 
> ++  E-Mail brunni@netestate.de
> ++  http://www.netestate.de/
> ++
> ++  Sitz: München, HRB Nr.142452 (Handelsregister B München)
> ++  USt-IdNr. DE221033342
> ++  Geschäftsführer: Michael Brunnbauer, Franz Brunnbauer
> ++  Prokurist: Dipl. Kfm. (Univ.) Markus Hendel



-- 
++  Michael Brunnbauer
++  netEstate GmbH
++  Geisenhausener Straße 11a
++  81379 München
++  Tel +49 89 32 19 77 80
++  Fax +49 89 32 19 77 89 
++  E-Mail brunni@netestate.de
++  http://www.netestate.de/
++
++  Sitz: München, HRB Nr.142452 (Handelsregister B München)
++  USt-IdNr. DE221033342
++  Geschäftsführer: Michael Brunnbauer, Franz Brunnbauer
++  Prokurist: Dipl. Kfm. (Univ.) Markus Hendel

Received on Tuesday, 8 October 2013 14:32:35 UTC

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