[Zope] Inherit from folder below

hi, Simple question: How can i get access to a property of a folder under the current folder? If i have a folder called "top_folder" which has a folder in it called "sub_folder", and the "sub_folder" has a property name "sub_folder_title" which a value of "This is the title of sub_folder_title". How can i get access to "sub_folder_title" if I am in "top_folder"? I have tried <dtml-var "sub_folder/sub_folder_title"> but it gives me a name error on "sub_folder_title". I hope that was not too confusing. Thanks in advance! - Lex Berezhny