input: [0] Exchangeable image file format for digital still cameras : Exif Version 2.2 (2002). [1] 2002 [3] This standard specifies the formats to be used for images, sound, and tags in digital still cameras and in other systems handling the image and sound files recorded by digital still cameras. [2] 
output: http://www.exif.org/Exif2-2.PDF#