tagging feature boxes?

What do you do if you want to tag a text frame in InDesign with the  
name of its repeating feature and that title is unique and not  
standard to DocBook?
(i.e a repeating feature box in a textbook or newsletter)

The sample book I am reading does not use docbook but makes its own  
tags.

Lets say you have text in a feature box that is called 3 minute  
retreat and you want  a database to be able to call up all 3 min  
retreat features.

How would you tag that in DocBook v5 in Indesign?