Hi,
my software makes all tags either with writable=false or marked with unsafe as read-only.
I query this information via:
exiftool -f -t -l -listx -use MWG
The tag ArtworkOrObjectAOCircaDateCreated in the XMP::iptcExt group is one of the writable=true / unsafe cases.
I could not figure out why this is so and I have a bug report for making this writable.
Is this maybe a mistake in your tables or is there a reason?
From the revision history:
Jan. 12, 2018 - Version 10.75
- Marked ArtworkCircaDateCreated as "unsafe" for writing to avoid it being
added when attempting to shift all date/time tags
Unsafe tags are writable. They just aren't written if specified with a wildcard (or 'all').
- Phil
Ah, OK.
I then make them writable in my software as well. I write tags explicitly with tag=content so, no wildcards.
Thanks and have a nice weekend!