{assign_by_ref} or sth. similar in a temp late

Hi folks, sorry for the maybe misleading subject. My problem is, I want to display a variable in a template, that's value is assigned later in the template, e.g. {$mytext} {include file="test.tpl} test.tpl contains anywhere {assign var="mytext" value="sometexthere"} but this does not work, with a test to add {$mytext} behind the assignline, show, that the vriable only exists after the assignment. so the question is is there something like a assign_by_ref inside the template, where the var is assigned before it gets filled with the real content and filled with the real content later? thx Ben