Header and than the samples
~~~~~~ @SAMPLES 3 @SNPCALLED=1 @SORTED=0 2R 1001 C A:T:C:G A:T:C:G A:T:C:G COV=1,SNP=0,bla=0 ~~~~~~~
Only ATCG, than the tags, which provide info if it is snp called, or suffiiently covered...or whatever