[ILUG] Content management system

[Rory Browne]

> Drupal. If it doesn't have any of what you've listed above, you can
> get somebody to add it for you. Of course, you could say that about
> just about anything, I guess :-)

Talking of CMS's, I need a feature, but not knowing what to call it makes it rather difficult to search for it. So far, I'm about half-way through combing through the drupal modules to se if I can find something to suit my requirements. 

I'll probably end up modifying an existing access module to provide this functionality, but I'd like to see if there's an existing module first.

I need users to only be able to access certain documents after they've accessed certain other documents. In order to access document C, I want my users to read(or at least open) documents A, and B first. Whawould you call this kind of feature. 

Any suggestions?