How to determine if a given Keynote has been tagged by Element, Material or User?

Hi, I see the great addins you have created through Identity Data on your keynote tag, are you able to tell me or show or send me a link to where it explains how to add these identity data for each into the family tag. I'm having a hard time creating a new tag with these parameters and you look like you've mastered this already. Any help is most appreciated.