7.7. GFF file

version gff3

[%info](dsp="gff file format"; filetype="plaintext"; encode="ascii")

[1] <string; ="##gff-version 3"> (dsp="gff version line"; end="\n")
[$*] {
    [1] <string; ="##.+"> (dsp="defination line"; re=$TRUE, end="\n")
}

[$+] {

    [1] {
        [1] <string> (dsp="seqname")
        [1] <string> (dsp="source"; NA=".")
        [1] <string> (dsp="feature")
        [1] <string> (dsp="start"; datatype="integer")
        [1] <string> (dsp="end"; datatype="integer")
        [1] <string> (dsp="score"; datatype="float"; NA=".")
        [1] <string; ={"+", "-"}> (dsp="strand")
        [1] <string; ={"0", "1", "2"}>
            dsp="frame";
            NA=".";
            value={"0":"the first base of the feature is the first base of a codon",
                "1": " the second base is the first base of a codon",
                "2":" the second base is the second base of a codon"})
        [1] {

            [$*] {
                [1] <string; ="[a-zA-Z]+[\-_0-9]*="> (dsp="attribute name"; re=$TRUE)
                [1] <string; ='"[a-zA-Z]+";'> (dsp="attribute value"; re=$TRUE)
            }

        } (dsp="attribute")
    } (dsp="one line of file"; sep=$TAB; end="\n")

}