I've updated the example query with your pro tip.
Thanks
FabC
Il giorno mer 8 mag 2019 alle ore 09:59 Markus Kroetzsch <
[email protected]> ha scritto:
> On 07/05/2019 23:37, Eugene Alvin Villar wrote:
> > Hi,
> >
> > You can fix the query by replacing the following SPARQL statement:
> >
> > ?country wdt:P31 wd:Q6256.
> >
> >
> > ...with the following 2 statements:
> >
> > ?country p:P31 ?countryStatement.
> > ?countryStatement ps:P31 wd:Q6256.
>
> Pro tip: you can also write
>
> ?country p:P31/ps:P31 wd:Q6256.
>
> so the query looks almost as simple as before. Replacing wdt:Pxxx with
> p:Pxxx/ps:Pxxx is a general pattern to switch from "preferred"
> statements to "all" statements.
>
> This will include deprecated statements though. To filter those, one
> would need the longer version and write something like
>
> ?country p:P31 ?statement .
> ?statement ps:P31 wd:Q6256 .
> FILTER NOT EXISTS {?statement wikibase:rank wikibase:DeprecatedRank}
>
> Markus
>
>
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--
*Fabrizio*
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