The list of props (4.9k) is returned quickly enough. Unfortunately it
includes all props: each one has a wikibase:qualifier "just in case"
select * {
?p wikibase:qualifier ?pq
}
It is a pity that this one times out, since the filter merely needs to
look for 1 statement instance, 4.9k times:
select * {
?p wikibase:qualifier ?pq
filter exists {?x ?pq ?y}
} limit 100
What query did you try?
On Sat, Jul 14, 2018 at 2:40 AM, Peter F. Patel-Schneider
<pfpschnei...@gmail.com> wrote:
> I'm trying to get a good estimate of how often which qualifier predicate is
> used.
>
>
> The obvious query times out, as expected, so I was trying to find a list of
> predicates that are used as qualifiers so that I can craft a query for each of
> them. There is
> https://www.wikidata.org/wiki/Wikidata:List_of_properties/Wikidata_qualifier
> but that can't be trusted as it doesn't include start time (P580) or end time
> (P582) which I expect to be the most common qualifier predicates.
>
>
> So, I'm stumped. Any suggestions?
>
>
> peter
>
>
>
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> Wikidata@lists.wikimedia.org
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--
Vladimir Alexiev, PhD, PMP
Lead, Data and Ontology Management
Ontotext Corp, www.ontotext.com
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