This document aims Informational RFC status. It defines an DNS ZONEVERSION option (as per RFC 6891) which is a way for DNS clients to request, and for authoritative DNS servers to provide, information regarding the version of the zone from which a response is generated. This seems a useful extension, as including zone version data in a response simplifies and improves the quality of debugging and and diagnostics since the version and the data are provided atomically.  This can be especially useful for zones and DNS providers that leverage IP anycast or multiple backend systems.

The document seems useful for operators and I would recommend reading and understanding its content. It is READY from an operational point of view.