This holds the rn — the Relative Name — of one retained historical sample from the rolling stats-history buffer UCS Manager keeps for a single Fabric Interconnect fan; it is only the final path segment identifying this object relative to its immediate parent, not the whole dn. Because a archived Fabric Interconnect fan reading is nested under a parent object in UCS Manager's tree, the rn is what distinguishes it from sibling entries under that same parent without repeating the full ancestor path every time. For an object whose dn is 'sys/switch-A/fan-module-1-1/fan-1/stats-hist-1', the rn would just be the trailing segment 'stats-hist-1'.