Is this possible?: Merging keywords/tags between 2 photos (with tagsFromFile?)

[Magmadar]

Hi there,
I have 2 versions of around 30,000 photos that have separate tag sets that are both meaningful. Is it possible to merge the keywords such that the tags from file 1 are added to file 2? From what I understand tagsFromFile will write all the tags from file 1 over file 2's current tags.

[Phil Harvey]

You can add to existing values with += when writing, or +< when copying.  See FAQ 17 for help understanding List-type tags.

- Phil

[Magmadar]

That's perfect, thank you.