> Errr, to apply any delta, including these, you need the document on hand. If your goal is to store deltas, this is no better than anything else. Doesn't this

> Errr, to apply any delta, including these, you need the document on hand. If your goal is to store deltas, this is no better than anything else. Doesn't this allow the sender to send updates without knowledge of the existing values, though? With a string diff, the existing value would have to be known. > This is in no way better at handling concurrent changes than anything other diff format. In fact, the extra operations it has do nothing to help you here (it is as good and bad as copy/add, or insert/delete diffs). I'd love to know why you seem to think otherwise. If you're sending a regular diff, you would clobber changes to other parts of the object if they were updated between your initial retrieval and subsequent change. But yeah, it doesn't seem to help with applying concurrent changes to the same part of an object, though I don't know if the patch format should shoulder that responsibility.