This read-only object mirrors the `id` property of the hardware-inventory tracking record UCS Manager keeps for a piece of equipment as it discovers and re-scans it inside Cisco UCS Manager's internal information model, exposed here as a non-negative gauge value for this equipment's inventory-status record. The id is a small numeric identifier distinguishing this specific instance of this equipment's inventory-status record from its siblings under the same parent (e.g., LED 1 vs LED 2 on the same board). On a chassis with two IOEs installed you would see id=1 and id=2 in separate rows for the inventory record for a power supply that was just reseated, letting you tell them apart even though both share the same parent dn prefix.