This is the object's relative name (Rn) — just the last path segment of its Dn, the piece this ChassisFeature instance contributes to its own address within the MIT tree. UCS Central creates one of these per optional chassis capability — for example whether power-capping or chassis-level firmware auto-install is available on a particular chassis — so an admin scanning the domain summary can see which chassis-level features are actually usable without logging into each chassis. 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 `sys/chassis-3/chassis-feature-power-cap`, so two sibling instances never end up with colliding addresses under the same parent.