This holds the rn — the Relative Name — of the reference record describing how PCI slot numbering and naming is defined for one specific equipment model; it is only the final path segment identifying this object relative to its immediate parent, not the whole dn. Because a PCI slot ID mapping record 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 'capabilities/pci-slot-id-mapping-1', the rn would just be the trailing segment 'pci-slot-id-mapping-1'.