When running running the exif2xmp.arg files, ExifTool copies the EXIF:Artist into the following XMP tags:
dc:Creator
xmpDM:artist
tiff:Artist
In the MWG documentation I can see than EXIF:Artist is to be synched with dc:creator and IPTC:By-line. The TIFF artist is only mentioned in passing in the text nearby...?
I've found a similar exception for the EXIF:imageDescription tag. The MWG guidelines suggest a mapping between this tag and XMP-dc:description and IPTC:Caption. But the exit2xmp.arg file also copies the EXIF tag into tiff:ImageDescription.
Is this documented somewhere? Looking at the exif2xmp.arg file does not really help in this case, because much of the work is done internally by ExifTool by one of the bulk copies.
Are the exif:Artist and exif:imageDescription the only tags which are copied into multiple XMP tags? I need to know in order to update all XMP tags linked that way before propagating XMP data back to EXIF with the xmp2exif.arg file.
The MWG recommendation only superficially mentions the XMP exif and tiff namespaces. The complete list of tags copied by the bulk copy is all tags in these groups (see the XMP tags documentation (https://exiftool.org/TagNames/XMP.html)), plus two XMP-xmp tags that are mentioned in the comments of exif2xmp.args. The duplicate tags will be any of these tags that are also copied to satisfy the MWG recommendation, namely:
| -XMP-dc:Description < EXIF:ImageDescription | (duplicated in XMP-tiff:ImageDescription) |
| -XMP-photoshop:DateCreated < EXIF:DateTimeOriginal | (duplicated in XMP-exif:DateTimeOriginal) |
| -XMP-xmp:CreatorTool < EXIF:Software | (duplicated in XMP-tiff:Software) |
| -XMP-dc:Rights < EXIF:Copyright | (duplicated in XMP-tiff:Copyright) |
| -XMP-dc:Creator < EXIF:Artist | (duplicated in XMP-tiff:Artist) |
- Phil
That helps a lot!
Thanks Phil :)