Is there a built-in or at least "best practices" way to autonumber new records?

Support
#1

I have several cases where there are standard master-detail compositions and we need the detail records to get the next number in sequence when a new record is added. DB-level sequences are system-wide so we can’t use that. This needs to be per-master, if that makes sense.

Is there a built-in facility to handle this, or barring that, is there an accepted “best practice” way to do it?

#2

There is no built-in facility, but numbering in a screen is quite simple, see this topic.