comps, primary, other, filelists

[Ken Teh]

I've been using the comps file to construct the packages list for my kickstart 
installs, ignoring the other files (primary, other, and filelists) that are in 
repodata folder.

Can someone explain what the other files are and if I need to review them for 
"other" packages? I notice that for centos 8, the comps file is called 
comps-baseos, suggesting that there are more (?) package groups listed elsewhere.

Thanks.