Role mappings can occur at two levels. Package level mappings override the mappings set at the default level. A default level is a level from which the role mapping is inherited.
Unwired Platform uses a role mapper to map logical and physical roles during an access control check. This allows developers to create applications that incorporate a logical access control policy. When the application is deployed, a security administrator can work with the developer to understand what the logical roles in the application were intended to do and map these logical roles to physical roles that exist in the real security system.