GFF - The acronym originally stood for Gene Finding Format, but current specifications are using Generic Feature Format. GFF is a line based, tab separated format for storing features and annotations. This makes it simple to read and write.
See examples/tools/gb_to_gff.pl for an example of writing a GFF file from a Bio::Seq object.
GFF2 specifications are available at the Sanger web site.
See the GTF page for more information. This is sometimes called GFF2.5 and was primarily developed for gene features.
The original WormBase GFF3 validator is currently offline.
mmscl supported_mRNA CDS 40759 41225 . + . Parent=mmscl mmscl supported_mRNA exon 61468 61729 . + . Parent=mmMAP_17 mmscl supported_mRNA exon 63653 63768 . + . Parent=mmMAP_17 mmscl supported_mRNA exon 65434 65537 . + . Parent=mmMAP_17 mmscl supported_mRNA exon 65983 66383 . + . Parent=mmMAP_17 mmscl RepeatMasker Repeat 55 115 378 - . Target=B4;Note="(230) 61";Name="SINE/B4" mmscl RepeatMasker Repeat 160 304 1153 + . Target=B1_MM;Note="1 147";Name="SINE/Alu"