You should be able to start/explore with within their NPC-EventManager host for this first.
You should also find the following within your netvoyant-host.
Directory of d:\NetVoyant\mibs
An installation of CA-NFA has replacements to reporter-files but these here may still be interchangeable.
As for NFA, please see the following page in the doc: Configure Traps for External Programs
The MIB contains information about the contents of the traps that CA Network Flow Analysis sends.
The MIB file is located in the following directory: <install_path>\reporter\MIB.