[AGENT++] Dow do I know with MIB import as root OID

[Dario maljur]

Hi

How does the one know with MIB is best for his root node or does he starts
from scrach. I have seen in MIB designed on create new - option "Select MIB
to import root OID from" how do I know with MIB i want? And say I want to
add value like temperature, where in MIB would I acctually put this value?