This is the object's relative name (Rn) — just the last path segment of its Dn, the piece this DefinitionFsm instance contributes to its own address within the MIT tree. When an admin creates or edits this QoS policy, UCS Manager has to push the change out to the fabric interconnects asynchronously, and this object is the FSM's top-level status record for that rollout. For this kind of object the Rn is typically built from the same identifying value as its Dn's final segment, e.g. the tail end of `org-root/ep-qos-def-gold-video/fsm`, so two sibling instances never end up with colliding addresses under the same parent.