This object is explicitly described as a duplicate, kept purely for display purposes, of cienaCesExtAclEntrySrcInetAddrType, existing in this extended ('Ext') ACL entry notification context to give the same address-family information without requiring a trap receiver to separately reference the base configuration table object. An admin's trap-handling tooling reads this directly out of the notification rather than needing to cross-reference the live 'Ext' ACL configuration table, simplifying trap-parsing logic since everything needed is self-contained in the notification's varbinds. For example, a management station receiving this extended-ACL notification trap can determine IPv4-versus-IPv6 for the accompanying source address purely from this duplicated field, without a separate GET against the base table.