The expression can be traced back to horse racing in the 1700s when goats were used to settle the horses. A young goat. An idiom is a turn of phrase that doesn't make sense when literally translated.
Description: GTF file is a General Feature Format File. The Gene transfer format (GTF) is a file format used to hold information about gene structure. It is a tab-delimited text format based on the general feature format (GFF), but contains some additional conventions specific to gene information.
CDF FILE. The CDF file describes the layout for an Affymetrix GeneChip array. There are two formats of this file, the first is an ASCII text format used by the MAS and GCOS 1.0 software and the second is a binary format used by later versions of GCOS - this format is also referred to as the XDA format.