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 <[email protected]> wrote: > On 17 May 2017 at 20:20, Andra Waagmeester <[email protected]> wrote: > > > > On Wed, May 17, 2017 at 5:52 PM, Andy Mabbett <[email protected] > > > > wrote: > >> > >> On 17 May 2017 at 16:28, Andra Waagmeester <[email protected]> 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 > > _______________________________________________ > Wikidata mailing list > [email protected] > https://lists.wikimedia.org/mailman/listinfo/wikidata >
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