[CentOS] Shared object packaging in rpm

I whipped up a quick spec to package Zenoss' wmi client and noticed it creates a
libasync_wmi_lib.so.0 and libasync_wmi_lib.so.0.0.1 that their python script would
otherwise copy during its install routine (obviously I wrote a native rpm section for
installation).

Anyone know the naming convention associated with so's when they get compiled,
what is the .0.1 extra file used for, they are slightly different.

Thanks,
jlc