The Internet-Draft "Extensible Delegation for DNS" (https://datatracker.ietf.org/doc/draft-dnsop-deleg/) aims to provide an enhanced method of delegation in the DNS, as an alternative to the traditional NS record.
This document describes an extension to the EPP domain mapping (https://datatracker.ietf.org/doc/std69/) to allow EPP clients to provision DELEG records for domain names in an EPP server.