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 <[email protected]> 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
> <[email protected]> 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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