[rt-users] Differences in files/filenames

[Mathew Snyder]

I'm trying to sort through lib/RT in order to figure out how to write
scrips/scripts.  I read the RT Essentials book but didn't see anything that
describes the differences between files such as CustomFieldValue.pm and
CustomFieldValues.pm.  More importantly, the _Overlay.pm files since, I think,
those are the files with the actual functions I'll be incorporating into my
scrips/scripts.

Thanks
Mathew