Opening the MIB reveals the custom objects that describe the HPDU system at the unit level.
As standard, these objects are first presented at the beginning of the file, listed under their parent group. The objects then appear again individually, defined and described in detail.
For example, the measurementsGroup group contains objects for sensor readings of HPDU as a whole. One object listed under this group, measurementsUnitSensorValue, is described later in the MIB as "The sensor value". pduRatedCurrent, part of the configGroup group, describes the HPDU current rating.