<?xml version="1.0" ?> <p xmlns:z="http://xml.zope.org/namespaces/tal"> <span z:define="local x str:hello brave new world"> <span z:content="text local:x">outer variable x, first appearance</span> <span z:define="local x str:goodbye cruel world"> <span z:content="text local:x">inner variable x</span> </span> <span z:content="text local:x">outer variable x, second appearance</span> </span> </p>