Last modified: 2014-11-14 22:00:34 UTC
The PDFs produced by the collection extension include a section with credits and licenses of the images included. EXPECTED The names mentioned there correspond to the users that have uploaded that image of any previous version in the same page. ACTUALLY In addition to the uploaders, all the editors of the page are included as well. At the end it is impossible to know who uploaded the initial picture and potential updates, and who simply added a translation or a template. This is a mis-attribution. You can test this here: https://ca.wikipedia.org/w/index.php?title=Usuari:Pere_prlpz/taller2&oldid=12992460 Fitxer:Can Manent Premià de Mar.jpg (...) Contribuïdors: Deosringas, Isidre blanc, Pere prlpz, Vriullop Fitxer:L'Amistat Premià de Mar.jpg (...) Contribuïdors: Deosringas, Isidre blanc, Pere prlpz, Vriullop In both cases Deosringas is the only uploader.
Furthermore, the names mentioned in PDF should be authors of images cited in the way required by the license of each image.
It is impossible to solve this until you have a way to tell which edits are substantial and which are purely technical. The same applies to the textual content. We only have a "minor edit" flag. Sometimes the original uploader is not the most important contributor, as somebody might have uploaded an improved version of the image (for example something was broken in the original file). Actually we should use Extension:CommonsMetadata for this if enabled.
There are some ways to tell, or, at least, to tell better than now: * People who have not uploaded any version of the file aren't the authors of the file. In the examples provided, there was only one version of the file, uploaded by one user, who obviously was the author. People who didn't upload anything aren't file authors, even if they edited file description page. * Some license templates provide the requested way to credit the image. I expect most of those templates to be machine readable.
It is also possible to be the only uploader and not the author e.g. in the Flickr imports...
