The number of the MIB file in the list MIB files supported by the
Mid-Level management station. The order of the MIB files in this
list must reflect the the IMPORT relation between the MIBS contained
in the MIB files, i.e., if MIB A IMPORTS FROM MIB B, the file containing
MIB A must have a lesser index in this table than the file containing
MIB B.