Further information on Building blocks in FrameMaker

[Daya, Shetil A - Arlington, VA - Contractor]

Hello everyone,
 
I wanted to know if there was a way to setup a "if...,them..." syntax
within FrameMaker.  The reason I'm asking is that I am troubleshooting
an issue with the header.  I currently have a hierarchical system
assisted to the tag order, but one tag need to be void (undisplayed) if
an instance of a special tag is used.  By using the "if...,then.." style
syntax, it can save me alot of time.  
 
Thanks
 
S. "Amit" Daya