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.
Universal Disk Format (UDF) is a file system specification defined by OSTA. One objective of UDF is to replace the ISO9660 file system on optical media (CDs, DVDs, etc).