The extra tags represent information found in the image but not associated with any other tag group.
Tag Name Writable Values / Notes CanonVRD N (the full Canon DPP VRD trailer block) Comment Y (comment embedded in JPEG, GIF89a or PPM/PGM/PBM image) Directory Y! EXIF N (the full EXIF data block) Encryption N Error N ExifToolVersion N FileModifyDate Y (the filesystem modification time) FileName Y! FileSize N FileType N ICC_Profile Y! (the full ICC_Profile data block) ImageHeight N ImageWidth N MIMEType N MaxVal N Warning N XMP Y (the full XMP data block) XResolution N YResolution N