chrm

beg

end

rs

designType

U

REF

ALT

(1-3) chrm, beg, end: the location of the SNP in BED format
(4) strand: strand
(5) rs: the rs-ID
(6) designType: Infinium-I or -II
(7) U: whether the "unmethylated allele" should be read as REF/ALT
(8) REF: the reference allele
(9) ALT: the alternative allele