If you want to know current assigned values of server variables with in your BI Server then follow these steps.
1. Open RPD
2. Goto Manage menu tab
3. From manage menu select “Sessions …”
4. Pops up Session Manager
5. From available sessions choose a session
6. Now click on variables tab, it will show all server and session variables and respective values at that particular time.
In general following type of variables you can see here
Session System: all these variables have specific purpose (reserved key words) with in BI system
Exp: USER, DISPLAYNAME, EMAIL, LOGLEVEL, GROUP, LAST_SYNCH_TIME, PORTALPATH, REQUESTKEY, SKIN, WEBGROUPS, PASSWORD
Session Non-System: These variables are created by admin, for various reporting purposes.
Exp: USERROLE, USERGEO, USERCURRENCY etc
Session System and Session Non-System variables are specific to user logged on.
Dynamic Repository Variables:
These variables can be used by any users with in BI system created by admin,
Exp: LASTWEEK, LASTMONTH, YESTARDAY, CURRENTYEAR etc
Static Repository Variables:
These are initialized when BI Server start remain same as long as server runs.
Exp: PATH_TO_RESOURCE_FILES, WELCOME_MESSAGE, etc.
For more information on variables and how to create variables look at here
Best practice: Optimally define dynamic repository variables.