How would it behave? The standard as written doesn't suggest any appropriate client behaviour.
It explicitly doesn't have to mean deprecation, the standard says it could also be returned from any short-lived resource. There's no way to see if the header applies to the whole server or just the specific resource or even query parameters, and no way to deduplicate to ignore known warnings.
It explicitly doesn't have to mean deprecation, the standard says it could also be returned from any short-lived resource. There's no way to see if the header applies to the whole server or just the specific resource or even query parameters, and no way to deduplicate to ignore known warnings.