@Edent IPTC also announced two specific tags for accessibility descriptions instead of the the generic caption, which might not always prioritise accessibility concerns. You can see a nice example at https://www.publishersweekly.com/pw/by-topic/digital/content-and-e-books/article/87947-how-publishers-can-get-alt-text-right.html, on where these differences matter. https://www.scribelytribe.com/post/one-giant-leap-for-accessibility-meet-the-new-photo-metadata-standards How Publishers Can Get Alt Text Right