nmsPibToMib is the root of the NMS-assigned
OID subtree for MIBs which are algorithmically
generated/translated from NMS PIBs with OIDs
assigned under the nmsPIB subtree.
These generated MIBs allow management
entities (other the current Policy Server) to
read the downloaded policy. By convention, for PIB
'nmsPIB.x', the generated MIB shall have the
name 'nmsPibToMib.x'.