.. This is part of the Photini documentation.
Copyright (C) 2012-15 Jim Easterbrook.
See the file ../DOC_LICENSE.txt for copying condidions.
Tag reference
=============
This section lists the "mapping" from Photini's field names (such as "Title / Object Name") to the EXIF / XMP / IPTC tags the data is stored in.
The tag names are those used by the Exiv2 library.
See http://exiv2.org/metadata.html for more detail.
As far as possible Photini follows the `Metadata Working Group `_ (MWG) `Guidelines for Handling Image Metadata `_.
These specify the mapping between tags in EXIF, XMP and IPTC, and say how software should reconcile any differences between information stored in equivalent tags.
Primary tags
------------
These tags are where Photini stores its metadata.
(IPTC tags are only used if they already exist in the file, in line with the MWG guidelines.)
Note that "Title / Object Name" and "Keywords" are not stored in EXIF.
You may prefer not to use these fields to ensure compatibility with software that only handles EXIF.
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Photini field EXIF tag XMP tag IPTC tag
======================= ============================== ========================= ==================
Title / Object Name Xmp.dc.title Iptc.Application2.ObjectName
Description / Caption Exif.Image.ImageDescription Xmp.dc.description Iptc.Application2.Caption
Keywords Xmp.dc.subject Iptc.Application2.Keywords
Copyright Exif.Image.Copyright Xmp.dc.rights Iptc.Application2.Copyright
Creator / Artist Exif.Image.Artist Xmp.dc.creator Iptc.Application2.Byline
Date / time Taken Exif.Photo.DateTimeOriginal Xmp.photoshop.DateCreated | Iptc.Application2.DateCreated
| Iptc.Application2.TimeCreated
Date / time Digitised Exif.Photo.DateTimeDigitized Xmp.xmp.CreateDate | Iptc.Application2.DigitizationDate
| Iptc.Application2.DigitizationTime
Date / time Modified Exif.Image.DateTime Xmp.xmp.ModifyDate
Orientation Exif.Image.Orientation
Aperture Exif.Photo.FNumber
Focal length Exif.Photo.FocalLength
Lens maker name Exif.Photo.LensMake
Lens model name Exif.Photo.LensModel
Lens serial number Exif.Photo.LensSerialNumber
Lens specification Exif.Photo.LensSpecification
Latitude, longitude | Exif.GPSInfo.GPSLatitude
| Exif.GPSInfo.GPSLongitude
======================= ============================== ========================= ==================
Secondary tags
--------------
Photini may read information from these tags and merge it with information from the primary tags.
These tags are deleted when the corresponding primary tags are saved.
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Photini field EXIF tag XMP tag IPTC tag
======================= =========================== ========================== ==================
Title / Object Name Iptc.Application2.Headline
Description / Caption Xmp.tiff.ImageDescription
Keywords
Copyright Xmp.tiff.Copyright
Creator / Artist Xmp.tiff.Artist
Date / time Taken Exif.Image.DateTimeOriginal Xmp.exif.DateTimeOriginal
Date / time Digitised Xmp.exif.DateTimeDigitized
Date / time Modified Xmp.tiff.DateTime
Orientation Xmp.tiff.Orientation
Aperture | Exif.Image.FNumber | Xmp.exif.FNumber
| Exif.Image.ApertureValue | Xmp.exif.ApertureValue
| Exif.Photo.ApertureValue
Focal length Exif.Image.FocalLength Xmp.exif.FocalLength
Lens maker name
Lens model name | Exif.Canon.LensModel
| Exif.CanonCs.LensType
Lens serial number
Lens specification | Exif.CanonCs.Lens
| Exif.CanonCs.MaxAperture
| Exif.CanonCs.MinAperture
| Exif.CanonCs.ShortFocal
Latitude, longitude | Xmp.exif.GPSLatitude
| Xmp.exif.GPSLongitude
======================= =========================== ========================== ==================