(feature request) adding structured keywords

Hello!
 
I've been using FRV in my workflow for culling, and it's an absolutely fantastic piece of software. Thank you for creating it. 
 
I was wondering if there is a possibility for adding keyword support while using FRV? 
 
During my culling process, I'll typically add structured keywords as a way to later organize / filter images, usually embedding them in the files so that my destination photo library software will have access to these keywords and photos can automatically sorted into "smart folders".
 
Considering that editing the Title/Description is available as a feature, my thoughts are that those who prefer using keywords should be able to do so as well.
 
Thanks!