The WWW_HRADMIN role is a business role which grants access to the HR Administration Self Service module, it does not grant execution rights.
The WWW_% business roles determine which web menu and splash the employee has access to. The WWW_HRADMIN web role is tied to the HRSS MAIN web menu and to the HRSS_SPLASH which will display all of the HR Administration related self service functions the Administrator has execution rights to.
