Does IPTC:Caption-Abstract hide another tag?

[Joanna Carter]

I'm trying to delete -iptc:caption-abstract but it refuses to go. I take it it reads from another tag behind the scenes?

[StarGeek]

No, IPTC:Caption-Abstract is unique.  But there are rare cases where it could be a problem to remove.  I've encountered it in a few images where some program had written 7 or more separate IPTC blocks.  Additionally, the IPTC block can appear in some trailer blocks such as FotoStation or AFCP blocks (normally it's held in the Photoshop block).

When I've encountered such files, I've usually had to rewrite all the data as in FAQ #20.  But it's been a long time since I've encountered one.

Just to verify, though, you're reading the IPTC:Caption-Abstract in exiftool after removing?  Because some programs will pull data from IPTC:Caption-Abstract, XMP:Description, and EXIF:ImageDescription to fill an entry.