Thanks Lukas, I will give that a shot.
Bob
On 08/29/2018 11:57 AM, Lucas Werkmeister wrote:
There is a solution, but it’s a bit hacky. You can get
the categories of
the file via the MWAPI service [1] and then try to match those
categories that denote a license (for example, a category starting with
“CC-” *probably* indicates a Creative Commons license).
Here’s a query using the example image you mentioned [2]:
SELECT ?item ?image ?categoryName WHERE {
BIND(wd:Q9188 AS ?item)
?item wdt:P18 ?image.
BIND(REPLACE(wikibase:decodeUri(CONCAT("File:", STRAFTER(STR(?image),
"/wiki/Special:FilePath/"))), " ", "_") AS ?imageTitle)
SERVICE wikibase:mwapi {
bd:serviceParam wikibase:api "Categories";
wikibase:endpoint "commons.wikimedia.org";
mwapi:titles ?imageTitle.
?categoryTitle wikibase:apiOutput mwapi:category.
}
BIND(STRAFTER(?categoryTitle, "Category:") AS ?categoryName)
FILTER(STRSTARTS(?categoryName, "CC-"))
}
In the future, this should become much easier, thanks to Structured
Commons [3].
Cheers,
Lucas
[1]:
https://www.mediawiki.org/wiki/Wikidata_Query_Service/User_Manual/MWAPI
[2]:
https://query.wikidata.org/#SELECT%20%3Fitem%20%3Fimage%20%3FcategoryName%2…
[3]:
https://commons.wikimedia.org/wiki/Commons:Structured_data
On 8/28/18 8:36 PM, Bob DuCharme wrote:
I know how to run SPARQL queries to find out
various properties of the
Empire State Building as shown on
https://www.wikidata.org/wiki/Q9188,
including the URL of the image shown there.
When I look at the
https://commons.wikimedia.org/wiki/File:Empire_State_Building_from_the_Top_…
web page I see that the image has a CC-BY-SA-2.0 license, but I can't
work out how to get to that in a query.
Can anyone show me a SPARQL query about this image where the query
result would show me the license type?
Thanks,
Bob
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