TAG[+-^] usage?

[enigmakv]

I am attempting to clean up some PDF files before importing to iBooks on the Mac.

All I want to do is remove the "Description" of the file (which iBooks uses as a "Category" and makes sorting impossible).

I'd like to keep the "Description" tag in the metadata, only with a blank string.

Using Exiftool 10.55...

exiftool -Description^= myfilename.pdf

all I get back is...
"Warning: Tag 'Description^' is not defined
Nothing to do."

And the "Description" tag already exists.  It is right there in the Exiftool printout with a bunch of text that I just want to be blank.

Am I doing something wrong?  or is this not possible?

-k-

[enigmakv]

oops!  It looks like the ^= functionality became available some time AFTER version 10.55.

So my next question...

Why is the most recent Homebrew version of Exiftool still 10.55 when the current version is 10.78?

I love the ability of Homebrew to mostly automatically take care of updates and keeping software current and would prefer to keep using it.

[StarGeek]

From the exiftool version history

Note: The most recent production release is Version 10.55. (Other versions are considered development releases, and are not uploaded to CPAN.)

[enigmakv]

Cool.  Thank you.

[Phil Harvey]

I plan to do a production release within a few weeks.  It is a bit overdue.

- Phil