[Zope] Acquisition 101 Question

Let's say I have three dtml methods: /Common/Top /Common/StyleSheet /Hello/index_html

From the index_html file inside the Hello folder, I want to call the Top file so I do:

<dtml-var "Common.Top()"> It is working well if the Top file does not include another document. If Top has something like <dtml-var StyleSheet>, it does not find the StyleSheet (except if i call it directly in the Common folder). Is it possible to do this? Thanks Remy