mage/Mage/src/main/resources/ratings/setsWithRatings.csv

1	# this file specifies which sets have set files.
2	# each line must be exactly the 3 letter expansion code. this corresponds to a csv resource file in the same directory
3	# The <set>.csv files have a strict format:
4	# each line must be:
5	# cardname : integer rating
6	# each set's ratings are post-processed to have a normalized score [1..100], so the files don't need to have the same rating system.
7	# I created the first few files with draftaholicsanonymous but you can use any integer rating system you want
8	grn
9	m19
10	dom
11	rix
12	xln
13	hou
14	akh
15	aer
16	kld
17	mm3
18	ima
19	m13