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Community Wishlist Survey 2023/Multimedia and Commons/Allow category in EXIF data

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Allow category in EXIF data

  • Problem: Using "[[Category:Exif model: $1]]" as value for "MediaWiki:Exif-model-value". This currently adds the category to the file description page, but the file doesn't get categorized in the category. If the file description page already contains an identical category, the category is displayed twice.
  • Proposed solution: see phab:T23795#248878
  • Who would benefit: anyone
  • More comments:
  • Phabricator tickets: T23795
  • Proposer: Shizhao (talk) 02:41, 2 February 2023 (UTC)[reply]


  • Would it be helpful to add operators to the search feature to search for images taken by specific cameras? Similar to how you can put filemime:image/png into the search bar? Because that is probably easier. Bawolff (talk) 05:52, 2 February 2023 (UTC)[reply]
    • @Bawolff: I think one of the benefits of the category approach is that photos can be added there even if they don't have the right EXIF data. That said, it does seem that what's wanted here is a way to search by camera, and probably the SDC captured with (P4082) property, combined with a bot that converts from EXIF to that, would be a good way to go. Then the info template could do the categorizing. Hacking system messages to do this doesn't feel all that solid. @Shizhao: Is the problem here, put more abstractly, that it's not possible to automatically categorize based on camera model? SWilson (WMF) (talk) 06:21, 6 February 2023 (UTC)[reply]
      If the native method is difficult to implement technically, using the bot method is also a temporary solution. Also, the mw:Manual:File metadata handling API seems to provide incomplete EXIF data? Shizhao (talk) 03:27, 8 February 2023 (UTC)[reply]
      @Shizhao: You're right, I was looking at this too broadly, sorry. There's definitely a bug in how the wikitext is being treated: it should either correctly add the category and not have it be duplicated, or not allow categories to be added there at all. SWilson (WMF) (talk) 04:04, 8 February 2023 (UTC)[reply]