Hi Niall On Wed, 23 Nov 2022 at 00:30, Niall O'Reilly via db-wg <db-wg@ripe.net> wrote:
On 22 Nov 2022, at 19:11, Nick Hilliard via db-wg wrote:
Careful with this, e.g. AS-NULL. There are some situations where referencing an empty set can be useful in RPSL.
I'm not sure whether Nick meant this as a single exception, or rather as an example of a category of useful empty sets.
One empty set is the same as any other empty set. We only need one clearly defined and easily recognisable empty set and we have that, AS-NULL. If I create an empty set, AS-WALKER it doesn't do anything that AS-NULL can't do. But AS-WALKER isn't instantly recognisable as an empty set. You have to query it to see that. If we have 100 empty sets in the database, including AS-NULL, that are all being used for valid reasons, 99 of them are redundant, duplicated objects and should be deleted...unless someone can tell me the value of a duplicated empty set. cheers denis co-chair DB-WG
I can well imagine that most "operationally empty objects" (as Denis put it) are either useless or troublesome.
As Nick says, "Careful with this."
Niall
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