It appears from http://indieweb.org/photo#IndieWeb_Examples that there are way more than 3+ publishing sites that support u-photo

• Need to verify proper markup on those examples!

For consuming, known implementations include:

• 1. Woodwind.xyz
• photo-comment consumers https://indieweb.org/photo_comment#IndieWeb_Examples that then display those photo comments
• 2. Redwind
• WordPress through a plugin?
• Would be nice to to verify how @snarfed is implementing photo-comments
• Other consuming code:
• 3. Bridgy Publish consumes u-photo for purposes of POSSEing that photo to various destinations specifically as a photo. (update per @snarfed comment below)
• Would be nice to determine what other kinds of u-photo consuming code / libraries / applications there may be

This issue is for tracking the maturity of u-photo to transition it to a core property.

Once all the "Need to" items above have been processed and resolved successfully, we should be able to move forward.

cc: @kylewm @snarfed @aaronpk @benwerd

Update: confirmed 3 consuming sites/implementations. See Above.

bridgy supports u-photo for publish (POSSE): https://brid.gy/about#picture

and backfeed: https://brid.gy/post/twitter/schnarfed/831552681210556416 . simplified markup snippet:

<article class="h-entry">
  <span class="p-author h-card">
    <a class="p-name u-url" href="https://snarfed.org/">Ryan Barrett</a>
    <img class="u-photo" src="https://pbs.twimg.com/profile_images/459041662707060736/Kb9Ex4X8.jpeg" alt="" />
  </span>
  <div class="e-content p-name">
  💯💯💯 (by <a href="https://twitter.com/itsmaeril">@itsmaeril</a>)
  </div>
  <img class="u-photo" src="http://pbs.twimg.com/media/C4pEu77UkAAVy9l.jpg" alt="attachment" />
  ...

The WordPress Semantic-Linkbacks Plugin (webmention) is supporting u-photo in h-cards for avatars. The h-entry photo is not handled by a WordPress plugin yet.