Renaming metrics with name from other OID

[Safal-Dhungana]

I am trying to monitor some In-row coolers and would like to extract only a part of the metrics from the table. I have found already where the values are located. But it seems like all the data is in a table structure where the name of each metric is stored on another subtree. I would like SNMP_Exporter to get the proper names for each specific metric. The code below is what i currently have in my generator of this device (ACRC602).
If i do a SNMPWALK on this OID: "1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.2" then i get the listing of all the metric names. If i want to get the string "Airflow" from the walk you could just append .1.4 on the end of the given OID. The ending of the metric names is mapped to the integer values like 1.4 at the end for Airflow.

An added question is if it is possible to give some kind of function list that are available or an API so new people can know what functions are available and how to use them.

ACRC602:
version: 1
walk:
- 1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.1.1.4 # Airflow
- 1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.1.1.5 # Fanspeed
- 1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.1.1.7 # SupplyAirTemp
- 1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.1.1.9 # ReturnAirTemp
- 1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.1.1.10 # SupplyHumidity
- 1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.1.1.11 # ReturnHumidity
- 1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.1.1.12 # CoolDemand
- 1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.1.1.13 # CoolOutput
- 1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.1.1.31 # RackInletTemp_1
- 1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.1.1.33 # RackInletTemp_2
- 1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.1.1.35 # RackInletTemp_3
- 1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.1.1.62 # EnteringFluidTemp
- 1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.1.1.64 # LeavingFluidTemp
- 1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.1.1.65 # ValvePosition
- 1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.1.1.67 # FluidFlow
lookups:
- source_indexes: [ifIndex]
lookup: ifAlias
- source_indexes: [ifIndex]
# Uis OID to avoid conflict with PaloAlto PAN-COMMON-MIB.
lookup: ifDescr