+
+.SH BCFTOOLS SPECIFIC VCF TAGS
+
+.TS
+center box;
+cb | cb | cb
+l | l | l .
+Tag Format Description
+_
+AF1 double Max-likelihood estimate of the site allele frequency (AF) of the first ALT allele
+CI95 double[2] Equal-tail Bayesian credible interval of AF at the 95% level
+DP int Raw read depth (without quality filtering)
+DP4 int[4] # high-quality reference forward bases, ref reverse, alternate for and alt rev bases
+FQ int Consensus quality. Positive: sample genotypes different; negative: otherwise
+MQ int Root-Mean-Square mapping quality of covering reads
+PC2 int[2] Phred probability of AF in group1 samples being larger (,smaller) than in group2
+PCHI2 double Posterior weighted chi^2 P-value between group1 and group2 samples
+PV4 double[4] P-value for strand bias, baseQ bias, mapQ bias and tail distance bias
+QCHI2 int Phred-scaled PCHI2
+RP int # permutations yielding a smaller PCHI2
+.TE