Re: [Wikidata] Improve Wikidata links to Dutch municipalities

[Andy Mabbett]

On 18 May 2017 at 10:13, Andra Waagmeester  wrote:

> Using P1921 will not always work. Especially in the case where resources use
> opaque identifiers either as internal identifiers and/or IRI's, making the
> transformation between the two impossible.
>
> Also having to rely on P1921 to run for example federated queries leads to
> complex query patterns. You always have to include an additional step where
> the IRIs are calculated on the fly.

Then all you have to do is persuade the community to drop the use of
external IDs and formatter URLs and move to storing full URIs.

I'm ambivalent as to which is the ideal solution; but using both,
inconsistently, and on an arbitrary basis, is certainly not it.

-- 
Andy Mabbett
@pigsonthewing
http://pigsonthewing.org.uk

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Re: [Wikidata] Improve Wikidata links to Dutch municipalities

[Andra Waagmeester]

Using P1921 will not always work. Especially in the case where resources
use opaque identifiers either as internal identifiers and/or IRI's, making
the transformation between the two impossible.

Also having to rely on P1921 to run for example federated queries leads to
complex query patterns. You always have to include an additional step where
the IRIs are calculated on the fly.


On Thu, May 18, 2017 at 12:51 AM, Andy Mabbett 
wrote:

> On 17 May 2017 at 20:20, Andra Waagmeester  wrote:
> >
> > On Wed, May 17, 2017 at 5:52 PM, Andy Mabbett  >
> > wrote:
> >>
> >> On 17 May 2017 at 16:28, Andra Waagmeester  wrote:
> >>
> >> > Just to add to Egon's comment IRI's can also be added to Wikidata
> using
> >> > the
> >> > Property P2888 - Exact Match.
> >>
> >> I wouldn't advise doing this when we already have the ID in a specific
> >> property.
> >>
> >
> > The ID usually points to human readable website, whereas in RDF the items
> > use IRI to distinguish between concepts. An IRI points to the related
> node
> > in the linked data cloud.  In the context of being able to link with
> > external (RDF) datasets, using the ID from a specific property does not
> > work.
>
> That's what we have P1921 for.
>
> --
> Andy Mabbett
> @pigsonthewing
> http://pigsonthewing.org.uk
>
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