We dont interpret data in any manner nor can be make things appear any different than your camera imprints them on the photo. Basically this is up to your camera. Your camera writes the name and value of a field in an array and imprints it on the photo. Whether using jhead or exif function of php that simply takes the data in an array from the image and reads the variables and we write the data into the database http://us.php.net/exif
You cant change what your camera has imprinted on the image. Now you may want to investigate whether your camera can show information in different formats.