Collaboration space object model provides for a Place consisting of rooms. A room is made up of pages. Folders are used to organize pages. Members belong to rooms, and are those users authorized to access them. Place type controls the creation of a place, including how many rooms it has, for example....http://www.google.co.uk/patents/US7865545?utm_source=gb-gplus-sharePatent US7865545 - System and method for independent room security management
