Re: How to publish SPARQL endpoint limits/metadata?

Hi All,

I would be very interested in seeing a standard way to extend the Service Description with
"authentication", "limits" and some content statistics. 

What I mean with content statistics is instead of running
SELECT DISTINCT ?type WHERE {[] a ?type}

You look for void class partitions in the description of the named graphs in the service description.

I tried to do this for beta.sparql.uniprot.org.

Regards,
Jerven
On Oct 8, 2013, at 12:05 PM, Barry Norton <barrynorton@gmail.com> 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> 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, 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
> 
> 
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Received on Saturday, 12 October 2013 17:44:31 UTC