Lucas_Werkmeister_WMDE created this task.
Lucas_Werkmeister_WMDE added projects: Wikidata, Wikidata-Query-Service.
Restricted Application added a subscriber: Aklapper.
TASK DESCRIPTION
The RDF value for a Commons Media value is supposed to be an IRI:
SELECT (STR(?image) AS ?str) (ISIRI(?image) AS ?isIri) WHERE {
wd:Q33231166 wdt:P18 ?image.
}
| str
| isIri |
|
----------------------------------------------------------------------------------------------------------------------------
| ----- |
|
http://commons.wikimedia.org/wiki/Special:FilePath/GuentherZ%202010-02-27%200207%20Wien10%20Scheunenstrasse2%20Bildstock.jpg
| true |
|
However, very occasionally, the query service contains the file name as a
simple string instead:
SELECT * WHERE {
?item wdt:P18 ?image.
FILTER(DATATYPE(?image) = xsd:string)
}
LIMIT 10
| item | image |
| ---- | --------------------------------------------------------------- |
| wd:Q9151148 | Andrey Ashchev.jpg
|
| wd:Q58191231 | 139.Egea (Valle de Lierp) - Iglesia de San Esteban +
Turbón.jpg |
| wd:Q58191231 | 141.Egea (Valle de Lierp) - Casa Albañil.jpg
|
| wd:Q16403761 | Ilmar Mikkor 1960.jpg
|
| wd:Q805547 | South end of the isle of Balta - geograph.org.uk - 1357955.jpg
|
| wd:Q21518597 | Hennie at a rugby game.jpg
|
| wd:Q78854 | Markus Werba 2009.jpg
|
| wd:Q16609740 | Museu lousado.JPG
|
| wd:Q5390854 | Pueblo de luis.jpg
|
| wd:Q5516267 | גד נבון.jpg
|
|
I have no idea why that happens. It could be a bug in the query service,
mixing up the values somehow (it feels vaguely similar to T255657
<https://phabricator.wikimedia.org/T255657>); but it could also be a bug in the
Wikibase RDF export – maybe Wikibase temporarily forgot that P18
<https://www.wikidata.org/wiki/Property:P18> is a Commons Media property, and
treated it like a string property instead.
TASK DETAIL
https://phabricator.wikimedia.org/T258782
EMAIL PREFERENCES
https://phabricator.wikimedia.org/settings/panel/emailpreferences/
To: Lucas_Werkmeister_WMDE
Cc: Aklapper, Lucas_Werkmeister_WMDE, CBogen, Akuckartz, darthmon_wmde,
Nandana, Namenlos314, Lahi, Gq86, GoranSMilovanovic, QZanden, EBjune, merbst,
LawExplorer, _jensen, rosalieper, Scott_WUaS, Jonas, Xmlizer, jkroll,
Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331
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