[Zope] Why I must set security-property "Access contents information" to get Data from Database?

Hi, I have protect my folder by using acl_users. But now I must allow access by anonymous to one DTML-Document. This document uses <dtml-in> to get data from my MySQL-Database. To allow acces I have to set the following security properties: 1. DTML-Document: View 2. Z-SQL-Method: Use Database Methods 3. Parent Folder: Access contents information Is that right? 1 is for viewing HTML. 2 and 3 for access Database. I'm not realy sure, why I must set 3? Can somebody explain it? Thanks, Patrick