1- refactor out the Mnote Entries structs, they are all the same 2- perhaps even use the generic exifentry for mnoteentries, its the same except "byteorder" 3- use a generic exif entry renderer for the default: case in mnote entries 4 5- more fileformat readers 6 7- implement more Maker Note Types 8- implement more Maker Note Entries 9 (see exiftool or exiv2 for data) 10