Re: [Wikidata] dcatap namespace in WDQS

[Stas Malyshev]

Hi!

> As part of our Wikidata Query Service setup, we maintain the namespace
> serving DCAT-AP (DCAT Application Profile) data[1]. (If you don't know
> what I'm talking about you can safely ignore the rest of the message).

Following up on this discussion and the feedback received, I have
decided to move dcatap namespace to separate endpoint -
https://dcatap.wmflabs.org/. I've updated the manual to reflect it[1].
The old setup is still working, but we'll be disabling updates, and
eventually also disable the namespace itself, so while it still be used
for now, if you plan to use it (logs suggest there's virtually no usage
now, but that can change of course) please use the endpoint above.

[1]
https://www.mediawiki.org/wiki/Wikidata_Query_Service/User_Manual#DCAT-AP
-- 
Stas Malyshev
smalys...@wikimedia.org

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Re: [Wikidata] dcatap namespace in WDQS

[Edgard Marx]

Great to see ideas envisioned in one paper [1] such as data catalogs and
KNS (Knowledge Name Services) being implemented on major knowledge graphs
and having a profound impact on publishing and querying data on the Web.

[1] https://ieeexplore.ieee.org/document/7889519

:-)

On Mon, Jul 29, 2019 at 9:03 AM Federico Leva (Nemo) 
wrote:

> Stas Malyshev, 29/07/19 04:14:
> > As part of our Wikidata Query Service setup, we maintain the namespace
> > serving DCAT-AP (DCAT Application Profile) data[1].
>
> How many of the endpoints we federate with support DCAT-AP? I suppose
> federated queries may benefit the most from it.
>
> DCAT-AP is allegedly taking off and it's given great importance for
> instance in the EU Open data maturity ranking
> <
> https://www.europeandataportal.eu/en/highlights/measurement-open-data-maturity-europe>:
>
> Italy, which is otherwise a laggard on open data, was scored high
> because its national portal embraced DCAT-AP.
>
> Federico
>
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Re: [Wikidata] dcatap namespace in WDQS

[Federico Leva (Nemo)]

Stas Malyshev, 29/07/19 04:14:

As part of our Wikidata Query Service setup, we maintain the namespace
serving DCAT-AP (DCAT Application Profile) data[1].


How many of the endpoints we federate with support DCAT-AP? I suppose 
federated queries may benefit the most from it.


DCAT-AP is allegedly taking off and it's given great importance for 
instance in the EU Open data maturity ranking 
: 
Italy, which is otherwise a laggard on open data, was scored high 
because its national portal embraced DCAT-AP.


Federico

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[Wikidata] dcatap namespace in WDQS

[Stas Malyshev]

Hi!

As part of our Wikidata Query Service setup, we maintain the namespace
serving DCAT-AP (DCAT Application Profile) data[1]. (If you don't know
what I'm talking about you can safely ignore the rest of the message).

Recent check showed that this namespace is virtually unused - over the
last two months, only 3 query per month were served from that namespace,
and all of them coming from WMF servers (not sure whether it's a tool or
somebody querying manually, did not dig further).

So I wonder if it makes sense to continue maintaining this namespace?
While it does not require very significant effort - it's mostly
automated - it does need occasional attention when maintenance is
performed, and some scripts and configurations become slightly more
complex because of it. No big deal if somebody is using it, that's what
the service is for, but if it is completely unused, no point is spending
even minimal effort on it, at least on main production servers (of
course, it'd be possible to set up a simple SPARQL server in labs with
the same data).

In any case, RDF dcatap data will be available in
https://dumps.wikimedia.org/wikidatawiki/entities/dcatap.rdf, no change
is planned there, but if the namespace is phased out, the data could no
longer be queried using WDQS. One could still download it and, since
it's a very small dataset, use any tool that can read RDF to parse it
and work with it.

I'd like to hear from anybody interested in this whether they are using
this namespace or plan to use it and what for. Please either answer here
or even better in the task[2] on Phabricator.

[1]
https://www.mediawiki.org/wiki/Wikidata_Query_Service/User_Manual#DCAT-AP
[2] https://phabricator.wikimedia.org/T228297
-- 
Stas Malyshev
smalys...@wikimedia.org

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