bed
What is a .bed file?
text/x-bed
BED is a tab-delimited format for genomic intervals. The first three columns — chromosome, 0-based start, and exclusive end — are required, and up to nine optional columns add name, score, strand, thick-drawn range, colour, and block (exon) structure. The half-open, zero-based coordinate convention is the single most common source of off-by-one errors when converting to or from GFF3 and other 1-based formats.
How to use a .bed file
Use an example .bed file to test interval parsers, overlap and intersection tools, and coordinate converters, verifying the half-open convention, correct handling of the optional trailing columns, and that track and browser header lines are skipped.