From the I title I thought it was going to be a post about the layout/structure of files (e.g. for JPEG and for ELF), but it’s actually a post about file/folder paths and their components.
For ELF see https://amir.rachum.com/blog/2016/09/17/shared-libraries/
Unfortunately “name” is ambiguous because when you say “filename” you definitely don’t mean just the stuff after the last slash.
Well, often you do, hence the ambiguity ;-p