What your building sounds like a document management system: http://en.wikipedia.org/wiki/Document_management_system http://en.wikipedia.org/wiki/Document_manag

What your building sounds like a document management system: http://en.wikipedia.org/wiki/Document_management_system http://en.wikipedia.org/wiki/Document_management_system. Might be worth looking at some to see how they'd fit with what you're envisioning. Even if you write it yourself, it can be helpful to see how others have solved the same problems.