> I think we'd probably need at minimum a way to signal that the OrderedCollection has had its ordering updated — I don't think current Add/Remove activities would be enough here. Move doesn't really offer the correct semantics for reordering a collection. Without getting too in-depth here, I wrote about this last year: https://socialhub.activitypub.rocks/t/pre-fep-evolving-orderedcollection-to-be-more-useful/4608 If we want to use the Collection model directly, then more definition is needed regarding its underlying data model and how to manipulate it as a data structure. There are little if any guarantees here. The problem is much less significant if you assume that the "feed" will be fetched every time. This allows the publisher to present the items in any order as it wishes. In an ActivityPub world, the model that makes the most sense is an actor that Announces objects so that you can browse its outbox. Perhaps this is sufficient?
Received on Friday, 6 June 2025 18:00:17 UTC