IPTC Keywords support.

Hello, i was watching this cataloging tutorial from another application https://www.youtube.com/watch?v=SwvFHZvGUHI and thought there could be same feature in FastRawViewer because it works much more faster right, but i was not able to find anything like this in the manual. Could you add IPTC Keywords and allow to specify them as well or even other tags like IPTC Content Location Code etc.
You can find IPTC manual here.