Is there a defined rule when to use underneath and when to use above when describing a child directory? I have encountered (and used) both:
Make sure the config file is stored above the web root.
(= outside the web root, not a child of it); also
Underneath the images folder, I have three sub-folders: Photographs, Illustrations and Thumbnails.
But I have heard it being used the other way round, too:
How to open files located under the webroot?
(referring to files outside the web root)
is there a correct one? Does this differ from OS to OS? How to avoid confusion?