mug file vs data file

mug file and data file both are nouns.

Word	Noun	Adjective	Verb	Adverb
mug file	Yes	No	No	No
data file	Yes	No	No	No

As nouns, data file is a hypernym of mug file; that is, data file is a word with a broader meaning than mug file:

mug file: a file of mug shots (pictures of criminals that are kept on file by the police)
data file: a set of related records (either written or electronic) kept together

Other hypernyms of mug file include file.

mug file (noun)	data file (noun)
a file of mug shots (pictures of criminals that are kept on file by the police)	a set of related records (either written or electronic) kept together