Would you happen to know if there is a "formal" name for "front end" material?
'Front Matter'. At least in English
Other cultures like to put an index in the front, as one example, so 'front' becomes a relative term.
Some like everything on the same level, so there is no 'front'. And still others like to bury the details in minutiae, leaving it to the reader to decode, often to the extent that they are left to come up with their own structure...or not.