[Zope-dev] [DTML] how to check an arbitrary role+permission ?

We ask dtml questions in this group, don't we ? Can't remember. This is hopefully a simple one. I have a zwiki-based website, where some of the pages are public and some are private. On one of the admin pages I want to list all the public pages, ie those pages for which the Anonymous role has View permision. Thanks in advance for any clues.. -Simon