Re: Discovery Protocol? (was: LODCloud SPARQL Endpoints Spreadsheet)

Hi All,

For UniProt we provide the void file on the place you would expect "
https://sparql.uniprot.org/.well-known/void" there are a few more endpoints
which do the same. e.g.
sparql.rhea-db.org even if the void is more limited.

For the EBI RDF platform they provide void files to HCLS spec (
https://www.w3.org/TR/hcls-dataset/) on their ftp site.

It's a bit of a catch 22. Publicity systems don't look at them, so tools do
not expect them to exist. While for us we drive some of our documentation
pages
and query optimizations with this (1). Making it a valuable addition for us
to expose it even if others don't yet look.

The dependency for many tools that look at sparql endpoints to be crowd
sourced instead of automated is a real shame.
Crowd sourcing doesn't scale for keeping such records up to date. e.g. for
practical reasons our RDF is split in a few hundred files,
no one is going to hand add these to a form every month.

FYI we are starting to use
https://sparql.uniprot.org/.well-known/sparql-examples/ for users to find
sparql example queries as a first step to
making it easier to share queries. This is interesting because we store our
example queries in our sparql endpoint which means we SPARQL to get SPARQL
queries.
This means we have just one piece of infra in production the SPARQL server
it self.

Regards,
Jerven

(1) Currently has a bug should be resolved next release later today.

On Wed, Sep 18, 2019 at 9:20 AM Heiko Paulheim <
heiko@informatik.uni-mannheim.de> wrote:

> Hi Jens,
>
> yes, there are ways of using, e.g., void descriptions. However, a small
> study we conducted a few years ago revealed that, at least back then, they
> were rarely used. [1]
>
> I don't know if things have changed in the meantime, but I'd rather doubt
> it.
>
> Best,
>
> Heiko
>
> [1] http://www.heikopaulheim.com/docs/iswc2013_poster.pdf
>
>
> Am 18.09.2019 um 08:55 schrieb Jens Scheidtmann:
>
> Hi everyone,
>
>
>
> Is there a way to discover SPARQL endpoints? “Way” meaning ideally a
> protocol or at least a linked data way of publishing the existence of a
> SPARQL endpoint or some such.
>
>
>
> Jens
>
>
>
> *Von:* Kingsley Idehen <kidehen@openlinksw.com> <kidehen@openlinksw.com>
> *Gesendet:* Mittwoch, 18. September 2019 03:10
> *An:* public-lod@w3.org
> *Betreff:* Re: LODCloud SPARQL Endpoints Spreadsheet
>
>
>
> On 9/17/19 7:57 PM, Michel Dumontier wrote:
>
> Hi,
>
>  So, Bio2RDF's datasets are now just served from one sparql endpoint, and
> are loaded into different (versioned) graphs. how do you want to deal with
> this?
>
> m.
>
> Hi Michel,
>
> Is there now a canonical endpoint that renders all the others redundant?
> Anyway, just add the endpoint in question or indicate the ones to be
> dropped.
>
> Kingsley
>
>
>
> On Tue, Sep 17, 2019 at 3:15 PM Kingsley Idehen <kidehen@openlinksw.com>
> wrote:
>
> Hi Everyone,
>
> As part of the LODCloud effort (starting in 2007), a number of SPARQL
> Endpoints emerged around the initial SPARQL endpoint provided by DBpedia.
> Today, that cloud has grown into the largest Knowledge Graph on earth (by
> far!) and continues to drive new frontiers related to Artificial
> Intelligence and Machine Learning.
>
> Having established itself as the preeminent global Knowledge Graph on
> earth, it is extremely important that we maintain an active list of SPARQL
> endpoints using practices that scale. Thus, we are providing a shared
> Google Spreadsheet for crowd-sourcing the maintenance of SPARQL endpoints
> that make up this important Knowledge Graph.
>
> Please contribute your SPARQL endpoint(s) to the spreadsheet.
>
> *Links*
>
> · SPARQL Endpoint Google Spreadsheet 1
> <https://community.openlinksw.com/t/open-invitation-for-contributions-to-an-up-to-date-list-of-query-service-endpoints-that-underlie-the-massive-lodcloud-knowledgegraph/1202>
>
> · What is the LODCloud, and why is it important?
> <https://medium.com/virtuoso-blog/what-is-the-linked-open-data-cloud-and-why-is-it-important-1901a7cb7b1f>
>
> --
>
> Regards,
>
>
>
> Kingsley Idehen
>
> Founder & CEO
>
> OpenLink Software
>
> Home Page: http://www.openlinksw.com
>
> Community Support: https://community.openlinksw.com
>
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>
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>
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>
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>
>
>
> Personal Weblogs (Blogs):
>
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>
>               http://kidehen.blogspot.com
>
>
>
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>
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>
>
>
>
>
> --
>
> Michel Dumontier
> Distinguished Professor of Data Science
>
> Maastricht University
> http://dumontierlab.com
>
>
>
> --
>
> Regards,
>
>
>
> Kingsley Idehen
>
> Founder & CEO
>
> OpenLink Software
>
> Home Page: http://www.openlinksw.com
>
> Community Support: https://community.openlinksw.com
>
> Weblogs (Blogs):
>
> Company Blog: https://medium.com/openlink-software-blog
>
> Virtuoso Blog: https://medium.com/virtuoso-blog
>
> Data Access Drivers Blog: https://medium.com/openlink-odbc-jdbc-ado-net-data-access-drivers
>
>
>
> Personal Weblogs (Blogs):
>
> Medium Blog: https://medium.com/@kidehen
>
> Legacy Blogs: http://www.openlinksw.com/blog/~kidehen/
>
>               http://kidehen.blogspot.com
>
>
>
> Profile Pages:
>
> Pinterest: https://www.pinterest.com/kidehen/
>
> Quora: https://www.quora.com/profile/Kingsley-Uyi-Idehen
>
> Twitter: https://twitter.com/kidehen
>
> Google+: https://plus.google.com/+KingsleyIdehen/about
>
> LinkedIn: http://www.linkedin.com/in/kidehen
>
>
>
> Web Identities (WebID):
>
> Personal: http://kingsley.idehen.net/public_home/kidehen/profile.ttl#i
>
>         : http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this
>
>
>
> --
> Prof. Dr. Heiko Paulheim
> Data and Web Science Group
> University of Mannheim
> Phone: +49 621 181 2652
> B6, 26, Room B0.22
> D-68159 Mannheim
>
> Mail: heiko@informatik.uni-mannheim.de
> Web: www.heikopaulheim.com
>
>

-- 
Jerven Bolleman
me@jerven.eu