We dont have great support for this. The best i know of is the "credit" field in https://commons.wikimedia.org/w/api.php?generator=categorymembers&gcmtitle=%20category:%20Media%20from%20Open%20Beelden%20%20&prop=imageinfo&gcmtype=file&iiprop=extmetadata|sha1&action=query&formatversion=2&gcmlimit=max&format=json but might need to parse some html (unless the data is included in exif/xmp in which case there is a different api query you can use). Also keep in mind you have to use the continue parameter to get the next page of results.
Hope that helps, --bawolff On Thursday, November 26, 2015, Jesse de Vos <jd...@beeldengeluid.nl> wrote: > Hi everyone, > > We’re trying to get a clearer picture of what material we have on Wikimedia Commons so that our next batch upload doesn’t duplicate with material that is already on Commons. The category: Media from Open Beelden contains all the files and we would like to have all the metadata on Commons for that category (specifically the 'source' URL) to match against our new content upload. > > Does anyone know how to gather this using the Commons API? Basically, a call to the API with the “File:title” field that would return a JSON object with all the metadata is exactly what we need. Help would be much appreciated! > > Best, > > Jesse > > -- > > Met vriendelijke groet, > > Jesse de Vos > Researcher Interactive and New Media > > T 035 - 677 39 37 > Aanwezig: ma t/m do > > < https://ci4.googleusercontent.com/proxy/-SRFha-hgXruUwURqU-2UHoKrRDxJA1bV-lcprm-obQlgDS90aaD-bHYTz3InAlVSVVv9hESQ9Z7v6tOZbVPXLe637s9tUuFOAOV14Gr7e7kWIqUDpsfbX4=s0-d-e1-ft#http://files.beeldengeluid.nl/handtekening/Beeld-en-Geluid_logo.jpg > > > Nederlands Instituut voor Beeld en Geluid > Media Parkboulevard 1, 1217 WE Hilversum | Postbus 1060, 1200 BB Hilversum | beeldengeluid.nl >
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