Re: How to publish SPARQL endpoint limits/metadata?

On 8-10-2013 12:22, Pieter Colpaert wrote:
> Hi Frans,
>
> Perhaps VoID could help if you create your own feature [1] which 
> describes your limitation added on the server?
Thanks, I did not know about this part of VoID. But two things make me 
wonder if it is appropriate:

1) Void:feature can be used for expressing certain technical features of 
a dataset. But a dataset and a SPARQL endpoint are different things, 
aren't they?
2) If I make up my own way of publishing endpoint metadata, how are 
other parties ever going to find those data?
>
> As a sidenote, maybe next to a SPARQL endpoint, just providing the 
> datadumps would be great as well?
Yes, I guess that is certainly a good idea. It will be of help for some 
of the usage scenarios.
>
> [1] http://www.w3.org/TR/void/#features
>
> Kind regards,
>
> Pieter
>
>
> On 10/08/2013 12:05 PM, Barry Norton wrote:
>> Frans, SPARQL 1.1 introduced the notion of Service Descriptions [1]. 
>> Although these probably don't go far enough in the standard they are, 
>> I believe, extensible.
>>
>> Barry
>>
>>
>> [1] http://www.w3.org/TR/sparql11-service-description/
>>
>>
>> On Tue, Oct 8, 2013 at 10:46 AM, Frans Knibbe | Geodan 
>> <frans.knibbe@geodan.nl <mailto:frans.knibbe@geodan.nl>> wrote:
>>
>>     Hello,
>>
>>     I am experimenting with running SPARQL endpoints and I notice the
>>     need to impose some limits to prevent overloading/abuse. The
>>     easiest and I believe fairly common way to do that is to LIMIT the
>>     number of results that the endpoint will return for a single query.
>>
>>     I now wonder how I can publish the fact that my SPARQL endpoint
>>     has a LIMIT and that is has a certain value.
>>
>>     I have read the thread Public SPARQL endpoints:managing (mis)-use
>>     and communicating limits to users
>> <http://lists.w3.org/Archives/Public/public-lod/2013Apr/0198.html>, but
>>     that seemed to be about how to communicate limits during querying.
>>     I would like to know if there is a way to communicate limits
>>     before querying is started.
>>
>>     It seems to me that a logical place to publish a limit would be in
>>     the metadata of the SPARQL endpoint. Those metadata could contain
>>     all limits imposed on the endpoint, and perhaps other things like
>>     a SLA or a maintenance schedule... data that could help in the
>>     proper use of the endpoint by both software agents and human users.
>>
>>     So perhaps my enquiry really is about a standard for publishing
>>     SPARQL endpoint metadata, and how to access them.
>>
>>     Greetings,
>>     Frans
>>
>>
>>     --------------------------------------
>>     *Geodan*
>>     President Kennedylaan 1
>>     1079 MB Amsterdam (NL)
>>
>>     T +31 (0)20 - 5711 347 <tel:%2B31%20%280%2920%20-%205711%20347>
>>     E frans.knibbe@geodan.nl <mailto:frans.knibbe@geodan.nl>
>>     www.geodan.nl <http://www.geodan.nl> | disclaimer
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>>
>
>


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--------------------------------------
*Geodan*
President Kennedylaan 1
1079 MB Amsterdam (NL)

T +31 (0)20 - 5711 347
E frans.knibbe@geodan.nl
www.geodan.nl <http://www.geodan.nl> | disclaimer 
<http://www.geodan.nl/disclaimer>
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