The unique identifier for a node containing boot devices in this table. The chassis and each installed component is represented by a hardware topology tree, where each node in the tree represents a component. The path to a particular component consists of one or more <component>,<instance> pairs, where each successive pair is a child of the previous parent pair. As an example, the root of the tree is the chassis and is represented by the pair 'CHASSIS, 1'. This pair indicates the first instance of the chassis. If a blade is inserted in slot 4 of the chassis, its topology path is 'CHASSIS, 1, BLADE, 4'. With this format, the components in the chassis can be determined along with their relative hierarchy to each other. This component inventory table is indexed by this unique topology path and the relevant numeric designations for the components are: CHASSIS, 0x01 Chassis MM, 0x02 Management Module BLADE, 0x03 Main system board of a blade