Creation rules - Value from another field

Creation rules - Value from another field

Hello, 

Is it possible to use value from other in the creation rules? 
Like : 

 set "Description" to "%Firstname%"  

O more complex (concatenation of multiple variable and text) 

 set "Description" to " 'My name is ' +  %Firstname% +' ' +%Lastname% ' '+' and my username is ' %Logonname' "  

Thanks in advanced 

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