help ! security realms

[Prem kalyan]

hi all,
       I am going through the security part of geronimo and the
corresponding deployment descriptor elements.I have few questions in
this regard

          1. What are all the different security realms supported in geronimo.
          2. What values does the attribute 'realm-name' in tag <realm> takes.
          3. What is the equivalent in geronimo  for "filerealm" in weblogic.

thanks in advance .

P.S If any of you can send me ur icq nos , i can get my doubts cleared quickly.

--
regards,
prem



-- 
regards,
prem