snarfed
backfeed Flickr tags on your photos
On Flickr, your contacts have permission (by default*) to add arbitrary text tags to your photos.
If your photo is a POSSE copy of an original post on your site, Bridgy should backfeed these as "tag-of" responses to the original post.
This is currently brainstormed here: https://indieweb.org/tag-reply#How_to_simple_tag-reply
In short with a class="u-tag-of" href="originalpostURL" and p-category properties of the text tags in the content of the h-entry.
Though as of this issue creation, there are no documented real world examples in the wild. I may have to change that and will follow-up once there are real world examples.
(*default: you can change permissions on Flickr to let anyone tag your photos, or no one, etc.)
API support for this is unclear. the only method i've found that seems likely to return it is https://www.flickr.com/services/api/flickr.photos.getInfo.html , but not even sure about that.
@tantek confirmed that these tags from other users show up immediately, and the <tag> elements returned by getInfo have an author attribute, so i expect that's it.
also as far as we know, flickr is the only (bridgy) silo with this feature.