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Re: SPARQL servers used in the LOD Cloud

From: Kingsley Idehen <kidehen@openlinksw.com>
Date: Fri, 01 Oct 2010 11:10:26 -0400
Message-ID: <4CA5F9E2.50802@openlinksw.com>
To: Richard Cyganiak <richard@cyganiak.de>
CC: public-lod@w3.org
  On 10/1/10 9:24 AM, Richard Cyganiak wrote:
> On 1 Oct 2010, at 14:06, Yves Raimond wrote:
>> The list seems to miss all the SWI-Prolog endpoints for some reason,
>> e.g. http://www.ckan.net/package/jamendo-dbtune
>
> That's because they were all 500 yesterday.
>
> From what I've seen, at any given time 10-20% of the LOD Cloud SPARQL 
> endpoints seem to be down ...
>
> Best,
> Richard
>
>
>>
>> Cheers,
>> y
>>
>> On Fri, Oct 1, 2010 at 2:02 PM, Jens Lehmann
>> <lehmann@informatik.uni-leipzig.de> wrote:
>>>
>>> Hello,
>>>
>>> On 01.10.2010 14:08, Richard Cyganiak wrote:
>>>>
>>>> The real news here is that we now have more than 100 live SPARQL
>>>> endpoints in the Cloud. I'm not going to attempt any further
>>>> interpretation of this data, but it should be useful for anyone who
>>>> needs SPARQL endpoints for testing their client against.
>>>
>>> Very nice list. Good to see that there are a few endpoints around.
>>>
>>> This entry seems to be listed twice:
>>> http://api.talis.com/stores/bbc-backstage/services/sparql
>>>
>>> A while ago I wrote a simple script for finding endpoints, which had 
>>> the
>>> output listed below. It may or may not be useful for you. There is no
>>> guarantee that those endpoints are still working (and of course 
>>> there is an
>>> overlap with your list). Last time I checked, some of those 
>>> endpoints didn't
>>> really support SPARQL (failed on simple SELECT/CONSTRUCT/ASK queries).
>>>
>>> Kind regards,
>>>
>>> Jens
>>>
>>>
>>> http://lod.openlinksw.com/sparql/
>>> http://www.semantic-systems-biology.org/biogateway/endpoint
>>> http://jena.hpl.hp.com:3040/backstage
>>> http://dbtune.org/bbc/peel/sparql
>>> http://dbtune.org/bbc/playcount/sparql
>>> http://www4.wiwiss.fu-berlin.de/dailymed/sparql
>>> http://semantic.data.gov/sparql
>>> http://data.gov.uk/sparql
>>> http://www4.wiwiss.fu-berlin.de/dblp/sparql
>>> http://dbpedia.org/sparql
>>> http://dbpedia-live.openlinksw.com/sparql/
>>> http://www4.wiwiss.fu-berlin.de/diseasome/sparql
>>> http://doapspace.org/sparql
>>> http://www4.wiwiss.fu-berlin.de/drugbank/sparql
>>> http://www.factforge.net/sparql
>>> http://openflydata.org/query/flyatlas_20080916
>>> http://openflydata.org/query/flyted_20081203
>>> http://spade.lbl.gov:2021/sparql,
>>> http://spade.lbl.gov:2020/sparql
>>> http://dbtune.org/henry/sparql/
>>> http://hcls.deri.org/sparql/
>>> http://abdera.watson.ibm.com:8080/sparql
>>> http://dbtune.org/jamendo/sparql
>>> http://data.linkedct.org/sparql
>>> http://data.linkedmdb.org/sparql
>>> http://lod.openlinksw.com/sparql/
>>> http://dbtune.org/magnatune/sparql
>>> http://dbtune.org/musicbrainz/sparql
>>> http://rdf.myexperiment.org/sparql
>>> http://sparql.neurocommons.org/sparql
>>> http://myopenlink.net:8890/sparql/
>>> http://demo.openlinksw.com/sparql/
>>> http://www4.wiwiss.fu-berlin.de/gutendata/sparql
>>> http://www.rdfabout.com/sparql
>>> http://revyu.com/sparql
>>> http://*.rkbexplorer.com/sparql/
>>> http://data.semanticweb.org/sparql
>>> http://sparql.semantic-web.at/sparql
>>> http://www.sparql.org/sparql
>>> http://www.wasab.dk/morten/2005/04/sparqlette/
>>> http://zbw.eu/beta/sparql
>>> http://www4.wiwiss.fu-berlin.de/is-group/sparql
>>> http://lsd.taxonconcept.org/sparql/
>>> http://uriburner.com/sparql/
>>> http://void.rkbexplorer.com/sparql/
>>> http://www.w3c.es/Prensa/sparql/
>>> http://dannyayers.com:8888/ontoworld/
>>> http://www4.wiwiss.fu-berlin.de/factbook/sparql
>>> http://api.talis.com/stores/periodicals/services/sparql
>>> http://km.aifb.uni-karlsruhe.de/services/sparql
>>> http://my.opera.com/community/sparql/sparql
>>>
>>> -- 
>>> Dipl. Inf. Jens Lehmann
>>> Department of Computer Science, University of Leipzig
>>> Homepage: http://www.jens-lehmann.org
>>> GPG Key: http://jens-lehmann.org/jens_lehmann.asc
>>>
>>>
>
>
>
Richard,

Also note: http://www.delicious.com/kidehen/sparql_endpoint . I've 
collated endpoints here for many years. This bookmark is also what we 
used re. SPARQL endpoint oriented DNS-SD instance setup.

BTW:
lod.openlinksw.com/sparql (missing from the list above) is a massive 
endpoint (as you know) that hosts as much of the LOD cloud we have been 
able to get our hands on. That said, I don't necessarily know how it 
could be accurately depicted in a cloud pictorial without said pictorial 
including data about database size. Our last count was 17+ Billion Triples.

Another confusing (re. pictorial construction) is: 
http://dbpedia-live.openlinksw.com/sparql (where the DBpedia Live 
edition is being hot staged).

-- 

Regards,

Kingsley Idehen	
President&  CEO
OpenLink Software
Web: http://www.openlinksw.com
Weblog: http://www.openlinksw.com/blog/~kidehen
Twitter/Identi.ca: kidehen
Received on Friday, 1 October 2010 15:10:56 UTC

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