[Zope] use combined propertysheet variables to form a file name for a zObject

[Allen Huang]

I made a propertysheet for a customed zclass and I wish to use some variables and combine them to form a name for my newed created object.
 
Say I have variable 
a = 'name a'
b = 'value b'
c = 'string c'
 
what do I encode in my dtml method some_add 
    <dtml-with "NewsClass.createInObjectManager(REQUEST['??????'], REQUEST)">
 
 ?????? into the combination of a, b, and c ?

		
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