Making parent dissappear when a child doesnt exist.

hi all,
 
i am brand new to the list. So hello all. Am posting my first question. I have a situation where i have a parent tag with a few child tags, some of which are mandatory. I am looking to write an XSLT so that my if all the mandatory children tag come in empty, my output XML should not render the parent itself.
 
Any inputs? 
 
tia
 
- Mayuresh



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