Editing New Features in EPrints 3.1 (section)

== Improved privilege handling ==
First, a quick refresher on the way privileges, roles and usertypes relate to each other:
* A privilege is a very fine-grained right. It allows, for example, a user to view the "history" tab on eprints they submitted, while the eprint is in the inbox. In this case "eprint/inbox/history:owner". 
* A "role" is a bunch of related privs that may be assigned to a user or usertype.
* A "user" has a "usertype". The user_roles.pl config file defines what roles are assigned to each usertype.
Now for the changes in 3.1:
* You can add (and remove) individual privs in the user_roles.pl
* Also a new field in User can be used to assign 
* New roles can be configured (roles are a set of related privileges)
* And you can define a new role. These are hats for assigning to individual users. For example a "edit item in buffer, but don't approve" hat.