It specifies how bits are used to encode information in a digital storage medium. File formats may be either proprietary or free and may be either unpublished or open. Some file formats are designed for very particular types of data: PNG files, for example, store bitmapped images using lossless data compression.
Subsequently, one may also ask, what is a file in file structure?
A data structure is a specialized format for organizing and storing data. General data structure types include the array, the file, the record, the table, the tree, and so on. Any data structure is designed to organize data to suit a specific purpose so that it can be accessed and worked with in appropriate ways.
What is an open file?
open file - Computer Definition. A file, typically a disk file, that has been made available to the application by the operating system for reading and/or writing. All files must be "opened" before they can be accessed and "closed" when no longer required.