(if you scroll through completely) has some decent examples for you and
lots of good information.
But perhaps that page is still missing better documentation to help you
form your queries? I think that might be the case.
Take a look and let us know what you think.
Then the community can add some better examples, or you can!
Thad
On Thu, Jun 24, 2021 at 4:34 AM Olaf Simons <olaf.simons(a)pierre-marteau.com>
wrote:
Dear all,
thank you, Dragan for the answer, yet this is nothing I can explain to
"normal users". They use the Query Service with the recommended input help
and they do get inexplicable January 1st dates (which, if the are not
suspicious, they will accept as the new knowledge).
What would speak against a a Query helper that gives data pretty much as
we have entered them?
Best,
Olaf
Dragan Espenschied
<dragan.espenschied(a)rhizome.org> hat am 23.06.2021
19:53 geschrieben:
Hello Olaf,
The trick is to query for the property value node instead of the
proterty direct value.
Example in ArtBase:
https://tinyurl.com/yft9u5kg
On Wikidata, you can replace
"rt:" --> "wdt:"
"rp:" --> "p:"
"rpsv:" --> "psv:"
With the "property direct" ("rt") you query for just the value of
the
property.
With "property" ("rp") you query for the node that holds the value,
and
more meta-information about the value.
The node contains the "node value" ("rpsv"), and that value has a
precision value ("wikibase:timePrecision"). 9 is year level, 10 is
month level, 11 is day level.
Hope that helps! :)
select ?artwork ?inception ?date_precision WHERE {
?artwork rt:P3 r:Q5 .
?artwork rt:P26 ?inception .
?artwork rp:P26 ?inception_node .
?inception_node rpsv:P26 ?inception_value .
?inception_value wikibase:timePrecision ?date_precision .
}
LIMIT 100
--
Dragan Espenschied
Preservation Director
Rhizome at the New Museum
On Mi, Jun 23 2021 at 11:50:12 +0200, Olaf Simons
<olaf.simons(a)pierre-marteau.com> wrote:
Dear All,
I wonder whether there is a simple way to retrieve dates with the
precision in they have been put into a wikibase.
Using SPARQL I get all years such as "1749" as "1 January 1749"
statements, no matter whether the person is born that day or not.
Should I run different searches?
Best,
Olaf
Dr. Olaf Simons
Forschungszentrum Gotha der Universität Erfurt
Am Schlossberg 2
99867 Gotha
Büro: +49-361-737-1722
Mobil: +49-179-5196880
Privat: Hauptmarkt 17b/ 99867 Gotha
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Dr. Olaf Simons
Forschungszentrum Gotha der Universität Erfurt
Am Schlossberg 2
99867 Gotha
Büro: +49-361-737-1722
Mobil: +49-179-5196880
Privat: Hauptmarkt 17b/ 99867 Gotha
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