table bed
"Browser Extensible Data"
(
   string  chrom;         "Reference sequence chromosome or scaffold"
   uint    chromStart;    "Start position in chromosome"
   uint    chromEnd;      "End position in chromosome"
   string  name;          "Name of item."
   uint    score;         "Score (0-1000)"
   char[1] strand;        "+ or - for strand"
   uint    thickStart;    "Start of where display should be thick (start codon)"
)
