## ExifTool Tag Names

The tables listed below give the names of all tags recognized by ExifTool.

> Tag Table Index
> JPEG EXIF IPTC XMP GPS GeoTiff ICC_Profile PrintIM Photoshop Canon CanonCustom CanonVRD Casio HP FujiFilm JVC | Kodak Leaf Minolta Nikon NikonCustom NikonCapture Olympus Panasonic Pentax Ricoh Sanyo Samsung Sigma Sony SonyIDC Unknown | DNG CanonRaw KyoceraRaw MinoltaRaw PanasonicRaw SigmaRaw JFIF FlashPix MPF Stim APP12 AFCP FotoStation PhotoMechanic Microsoft GIMP | MIE Jpeg2000 GIF BMP PICT PNG MNG MIFF PSP PDF PostScript ID3 ITC Vorbis FLAC APE | MPC MPEG M2TS H264 QuickTime Matroska Flash Real RIFF AIFF ASF DICOM DjVu HTML EXE LNK | Font RSRC Rawzor ZIP RTF OOXML iWork Extra Composite Shortcuts MWG

Tag ID, Index or Sequence is given in the first column of each table. A Tag ID is the computer-readable equivalent of a tag name, and is the identifier that is actually stored in the file. An Index refers to the location of a value when found at a fixed position within a data block, and Sequence gives the order of values for a serial data stream.

A Tag Name is the handle by which the information is accessed in ExifTool. In some instances, more than one name may correspond to a single tag ID. In these cases, the actual name used depends on the context in which the information is found. Case is not significant for tag names. A question mark (`?`) after a tag name indicates that the information is either not understood, not verified, or not very useful -- these tags are not extracted by ExifTool unless the Unknown (-u) option is enabled. Be aware that some tag names are different than the descriptions printed out by default when extracting information with exiftool. To see the tag names instead of the descriptions, use `exiftool -s`.

The Writable column indicates whether the tag is writable by ExifTool. Anything but an `N` in this column means the tag is writable. A `Y` indicates writable information that is either unformatted or written using the existing format. Other expressions give details about the information format, and vary depending on the general type of information. The format name may be followed by a number in square brackets to indicate the number of values written, or the number of characters in a fixed-length string (including a null terminator which is added if required).

A plus sign (`+`) after an entry in the Writable column indicates a "list" tag which supports multiple values and allows individual values to be added and deleted. A slash (`/`) indicates an "avoided" tag that is not created when writing if another same-named tag may be created instead. To write these tags, the group should be specified. A tilde (`~`) indicates a tag this is writable only when the print conversion is disabled (by setting PrintConv to 0, using the -n option, or suffixing the tag name with a `#` character). An exclamation point (`!`) indicates a tag that is considered unsafe to write under normal circumstances. These "unsafe" tags are not set when calling SetNewValuesFromFile() or copied with the exiftool -tagsFromFile option unless specified explicitly, and care should be taken when editing them manually since they may affect the way an image is rendered. An asterisk (`*`) indicates a "protected" tag which is not writable directly, but is written automatically by ExifTool (often when a corresponding Composite or Extra tag is written). A colon (`:`) indicates a mandatory tag which may be added automatically when writing.

The HTML version of these tables also lists possible Values for discrete-valued tags, as well as Notes for some tags. The Values are listed as the computer-readable and human-readable values on the left and right hand side of an equals sign (`=`) respectively. The human-readable values are used by default when reading and writing, but the computer-readable values may be accessed by disabling the value conversion with the -n option on the command line, by setting the ValueConv option to 0 in the API, or or on a per-tag basis by appending a number symbol (`#`) to the tag name.

Note: If you are familiar with common meta-information tag names, you may find that some ExifTool tag names are different than expected. The usual reason for this is to make the tag names more consistent across different types of meta information. To determine a tag name, either consult this documentation or run `exiftool -s` on a file containing the information in question.

(This document generated automatically by Image::ExifTool::BuildTagLookup)
Last revised Oct 7, 2010

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