GFF3 mirGFF3 1.21 mirGFF3 is a common format for microRNA data resulting from small-RNA RNA-Seq workflows. miRTop format mirGFF3 is a specialisation of GFF3; produced by small-RNA-Seq analysis workflows, usable and convertible with the miRTop API (https://mirtop.readthedocs.io/en/latest/), and consumable by tools for downstream analysis. RNA annotation format