Search for files that do not contain keywords

[Joanna Carter]

Does anyone have the syntax for an -if that will list all files that do not have keywords?

[Joanna Carter]

I found it!!!

For those that have need...

exiftool -if 'not defined $keywords' -r -filename .

[StarGeek]

Depending upon the programs used, keywords might also be in Subject
exiftool -if 'not (defined $keywords or defined $subject)' -r -filename /path/to/files/

In most cases, simply -if 'not ($keywords or $subject)' should work.  Adding defined covers the edge cases where the only keyword is "0" or an empty string.