## Extra Tags

The extra tags represent extra information extracted or generated by ExifTool that is not associated with another tag group. The three writable "pseudo" tags (Filename, Directory and FileModifyDate) may be written without the need to rewrite the file since their values are not contained within the file data.

> Tag Name | Writable | Values / Notes
> --- | --- | ---
> CanonVRD | Y! | (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 for JPEG images)
> Encryption | N |
> Error | N |
> ExifByteOrder | Y | (only writable for newly created EXIF segments) 'II' = Little-endian (Intel, II) 'MM' = Big-endian (Motorola, MM)
> ExifToolVersion | N |
> ExifUnicodeByteOrder | Y | (the EXIF specification is particularly vague about the byte ordering for Unicode text, and different applications use different conventions. By default ExifTool writes Unicode text in EXIF byte order, but this write-only tag may be used to force a specific byte order) 'II' = Little-endian (Intel, II) 'MM' = Big-endian (Motorola, MM)
> 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 |
> Now | N | (used to set the value of a tag to the current date/time. Not generated unless specified)
> Warning | N |
> XMP | Y | (the full XMP data block)
> XResolution | N |
> YResolution | N |

(This document generated automatically by Image::ExifTool::BuildTagLookup)
Last revised Mar 27, 2008

<-- ExifTool Tag Names