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Re: The truth about SPARQL Endpoint availability

From: Kingsley Idehen <kidehen@openlinksw.com>
Date: Mon, 28 Feb 2011 18:24:04 -0500
Message-ID: <4D6C2E94.8040205@openlinksw.com>
To: Pierre-Yves Vandenbussche <pierre-yves.vandenbussche@mondeca.com>
CC: Bob Ferris <zazi@elbklang.net>, Linked Data community <public-lod@w3.org>
On 2/28/11 6:03 PM, Pierre-Yves Vandenbussche wrote:
> Kingsley,
>
> Thanks for your support. All data available through the SPARQL 
> endpoint is compliant to this vocabulary: 
> http://labs.mondeca.com/vocab/endpointStatus which relies on VoID . 
> What Robert suggested me is to integrate RDFa in RSS feed which is a 
> great idea.

Yes. But you can also do same in the HTML page that contains the list of 
endpoints. In addition, you can use <link 
rel="{some-predicate-uri-if-not-IANA-registered}" .... /> to make this 
machine readable discernible agents that understand Web Linking 
semantics. Of course, you could also go one level deep re. HTTP metadata 
using "Link:".

Links:

1. 
http://linkeddata.informatik.hu-berlin.de/uridbg/index.php?url=http://dbpedia.org/page/Linked_Data&acceptheader=&useragentheader= 
-- Example of what I mean .


Kingsley
>
> I will for sure improve the endpoint accessibility for humans.
>
> Pierre-Yves Vandenbussche
> Research & Development
> Mondeca
> 3, citÚ Nollez 75018 Paris France
> Tel. +33 (0)1 44 92 35 07 - fax +33 (0)1 44 92 02 59
> Mail: pierre-yves.vandenbussche@mondeca.com 
> <mailto:pierre-yves.vandenbussche@mondeca.com>
> Website: www.mondeca.com <http://www.mondeca.com/>
> Blog: Lešons de choses <http://mondeca.wordpress.com/>
>
>
> On Mon, Feb 28, 2011 at 11:54 PM, Kingsley Idehen 
> <kidehen@openlinksw.com <mailto:kidehen@openlinksw.com>> wrote:
>
>     On 2/28/11 5:43 PM, Pierre-Yves Vandenbussche wrote:
>>     Robert,
>>
>>     Do you have example of "inline Semantic Web Linked Data in the
>>     feeds" ?
>>
>>     My SPARQL endpoint have no human client for the moment ...
>>     computer first !!
>
>     Do you have a graph representation of the data describing SPARQL
>     endpoint availability using term from the vocabulary you devised
>     for this effort?
>
>     Basically, do you have HTML+RDFa, RDF/XML, N-Triples, Turtle etc..
>     representations of your entity descriptions graphs? You could
>     place SPARQL protocol URLs in <link/> within <head/> as we do re.
>     DBpedia pages, for instance.
>
>     Kingsley
>
>>
>>
>>     Pierre-Yves Vandenbussche
>>     Research & Development
>>     Mondeca
>>     3, citÚ Nollez 75018 Paris France
>>     Tel. +33 (0)1 44 92 35 07 - fax +33 (0)1 44 92 02 59
>>     Mail: pierre-yves.vandenbussche@mondeca.com
>>     <mailto:pierre-yves.vandenbussche@mondeca.com>
>>     Website: www.mondeca.com <http://www.mondeca.com/>
>>     Blog: Lešons de choses <http://mondeca.wordpress.com/>
>>
>>
>>     On Mon, Feb 28, 2011 at 11:35 PM, Bob Ferris <zazi@elbklang.net
>>     <mailto:zazi@elbklang.net>> wrote:
>>
>>         Oh sorry,
>>
>>         I overlooked this for some reason. What a pitty. However, I
>>         thought more about some inline Semantic Web Linked Data in
>>         the feeds. Would that be an option?
>>
>>         Cheers,
>>
>>
>>         Bob
>>
>>
>>         PS: http://labs.mondeca.com/repositories/ENDPOINT_STATUS
>>         delivers me a "Missing parameter: query". So I guess, I have
>>         to parametrize the request. An instruction for that might be
>>         useful then ;)
>>
>>
>>         Am 28.02.2011 23:25, schrieb Pierre-Yves Vandenbussche:
>>
>>             Hello Robert,
>>
>>             Every information produced by this service are stored in
>>             a SPARQL
>>             Endpoint :
>>             http://labs.mondeca.com/sparqlEndpointsStatus/endpoint/endpoint.html
>>             These open data are linked to CKAN ones. You can already
>>             access them.
>>
>>             best,
>>
>>             Pierre-Yves Vandenbussche
>>             Research & Development
>>             Mondeca
>>             3, citÚ Nollez 75018 Paris France
>>             Tel. +33 (0)1 44 92 35 07 - fax +33 (0)1 44 92 02 59
>>             Mail: pierre-yves.vandenbussche@mondeca.com
>>             <mailto:pierre-yves.vandenbussche@mondeca.com>
>>             <mailto:pierre-yves.vandenbussche@mondeca.com
>>             <mailto:pierre-yves.vandenbussche@mondeca.com>>
>>             Website: www.mondeca.com <http://www.mondeca.com>
>>             <http://www.mondeca.com/>
>>             Blog: Lešons de choses <http://mondeca.wordpress.com/>
>>
>>
>>
>>             On Mon, Feb 28, 2011 at 10:45 PM, Bob Ferris
>>             <zazi@elbklang.net <mailto:zazi@elbklang.net>
>>             <mailto:zazi@elbklang.net <mailto:zazi@elbklang.net>>> wrote:
>>
>>                Congrats Pierre, well done!
>>
>>                This might hopefully become a quite useful resource.
>>             Any plans to
>>                publish this information itself as Semantic Web Linked
>>             Data?
>>
>>                Cheers,
>>
>>
>>                Bob
>>
>>                Am 28.02.2011 19:55, schrieb Pierre-Yves Vandenbussche:
>>
>>                    Hello all,
>>
>>                    you have already encountered problems of SPARQL
>>             endpoint
>>                    accessibility ?
>>                    you feel frustrated they are never available when
>>             you need them?
>>                    you develop an application using these services
>>             but wonder if it is
>>                    reliable?
>>
>>                    Here is a tool
>>             <http://labs.mondeca.com/sparqlEndpointsStatus/index.html>[1]
>>
>>                    that allows you to know public SPARQL endpoints
>>             availability
>>                    and monitor them in the last hours/days.
>>                    Stay informed of a particular (or all) endpoint
>>             status changes
>>                    through RSS feeds.
>>                    All availability information generated by this tool is
>>                    accessible through a SPARQL
>>                    endpoint.
>>
>>                    This tool fetches public SPARQL endpoints from CKAN
>>             <http://ckan.net/> open data.
>>
>>                     From this list, it runs tests every hour for
>>             availability.
>>
>>                    [1]
>>             http://labs.mondeca.com/sparqlEndpointsStatus/index.html
>>             <http://labs.mondeca.com/sparqlEndpointsStatus/index.html>[2]
>>             http://ckan.net/
>>
>>                    Pierre-Yves Vandenbussche.
>>
>>
>>
>
>
>     -- Regards, Kingsley Idehen President & CEO OpenLink Software Web:
>     http://www.openlinksw.com
>     Weblog: http://www.openlinksw.com/blog/~kidehen
>     <http://www.openlinksw.com/blog/%7Ekidehen> Twitter/Identi.ca:
>     kidehen
>
>


-- 

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 Monday, 28 February 2011 23:24:35 UTC

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