Re: Comment re SPARQL 1.1 Service Description


What would be available from /.well-known/sparql?

RFC 5785 says the URI should return metadata. This isn't completely
incompatible with also deploying the SPARQL endpoint to that location,
but doesn't seem quite right to me.

For example a domain may have several SPARQL endpoints, e.g. for
several datasets or with different policies, capabilities or access
control settings, so assuming a single Service Description seems

Perhaps the response should be a document that links to available
SPARQL endpoints, from which the Service Descriptions can be
retrieved. This can just reuse the terms from the SD vocabulary:


    <sd:url rdf:resource="http://www.example/sparql/"/>

The response from the well-known URI boot-straps us into a hypermedia
format in which we can follow links.

This could be specified as a separate small spec, not requiring any
specific changes to the SD document.



On 3 June 2010 10:53, Michael Hausenblas <> wrote:
> I reviewed the SPARQL 1.1 Service Description W3C Working Draft 1 June 2010
> [1] - great job so far.
> Not sure if this is already on your radar, but in order to ensure a wide
> uptake concerning end-point discovery, I propose to register a well-known
> URI as per RFC5785 [2], i.e. to add the following to the SPARQL 1.1 Service
> Description document:
> ===
> 5. Well-Known URI Registration
> URI suffix:  sparql
> Change controller:  W3C.
> Specification document(s):  This document.
> ===
> This registry is quite new (as well as the RFC defining it) and I so far
> failed to figure what suffixes have been registered already. Nevertheless, I
> think it would tremendously help and hope that this is the right place to do
> it. If not, please let me know and I'll explore alternatives.
> Cheers,
>      Michael
> [1]
> [2]
> --
> Dr. Michael Hausenblas
> LiDRC - Linked Data Research Centre
> DERI - Digital Enterprise Research Institute
> NUIG - National University of Ireland, Galway
> Ireland, Europe
> Tel. +353 91 495730
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Leigh Dodds
Programme Manager, Talis Platform

Received on Monday, 7 June 2010 10:39:20 UTC