[Zope] tal:replace and Traverse

Hi; I can do this: <div tal:replace="template/comment"></div> and fetch my variable from the document. However, I want to be able to fetch it from another document, like this: <div tal:replace="Essential_Documentation/Rosenthal_Interview_frame.pt/template/comment"></div> But that syntax doesn't work. How do I do it? TIA, Nancy