Repository consists of three domains :

1. Security Domain
2. Universe Domain
3. Document Domain

The universe domain consists of all the universes which are exported by users to the repository. A repository can contain more than one universe domain and document domain but not security domain. There must be only one security domain.

Security domain contains all the information about the users, groups and their privileges. It contains login information like login name, password, last logon, last updated etc.

Document domain contains all the documents which are shared by the different users. This is the place where all the users share their documents.