table bed9_gff
"BED3+6 Annotation"
    (
    string chrom;  "Reference sequence chromosome"
    uint chromStart;  "Start position in chromosome, 0-based coordinate system"
    uint chromEnd;  "End position in chromosome"
    string source;  "The name of the annotation source (e.g., ensembl_havana, hg19_rmsk),"
    string type;  "Type of feature being annotated (e.g., gene, transcript, exon)"
    char[1] strand;  "Strand (+ for forward, - for reverse)"
    uint score;  "Score"
    string phase;  "One of '0', '1' or '2'. '0' indicates that the first base of the feature is the first base of a codon, '1' that the second base is the first base of a codon, and so on"
    string gff_attributes;  "Additional gff attributes in the form of key-value pairs"
    )