This is the Relative Name -- just this object's own path segment -- for the capability-catalog entry matched to this PSU, i.e. the last component of the dn value rather than the full path. UCS Manager builds every object's dn by concatenating rn segments up the management tree, so this value is the piece specific to the cap-provider child object under a particular PSU, letting tools reconstruct or parse the hierarchy without re-walking the whole tree. For a PSU's capability provider the rn is typically the literal string cap-provider, which appended to the parent PSU's dn produces the full path shown in the dn column.