Common fields for VCF files

Field	Description
Chrom	chromosome that the variation is being called on
Pos	base position of the variant
ID	identifier of the variant
Ref	reference base at the position of variance
Alt	alternate alleles at the position
Qual	quality score of the given alleles
Filter	indicates which set of filters failed or passed
Info	descriptions of the variation
Format	(optional) fields describing the sample
Samples	values for each of the samples listed under format