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.
File type specification: Database file type. File extension sdf is most likely best know for its use in Microsoft SQL Server for a compact database files, also used in various third-party software programs as embedded database files for storing various data in single file like using Microsoft SQL server.