Role, user one doubt..pls help

When i query dba_role_privs, one of the GRANTEE there is 'DBA' which is granted several roles & now when i query dba_users there is no 'DBA' value in column USER there....i understand one would say DBA would be a role in dba_role_privs and not an actual user..but if thats the case then why SYS which is assigned DBA role has some similar roles which are shown assigned to this GRANTEE 'DBA'....also if any user DBA is there why it is not showing up in dba_users...please let me know where am wrong or misunderstood something..or let me know if i need to rephrase my query to make it more clear.....Thanks a lot for help..!

DBA is a role.

i know, but confused..pls tell me why then SYS is assigned these roles (olap_dba, plustrace,javaadmin,xdbadmin, import, export db etc) again when it has dba role always assigned to it.
pls see this & explain , sorry am confused


SQL> select * from dba_role_privs where grantee = 'DBA';

GRANTEE GRANTED_ROLE
------------------------------ -------------------------
DBA OLAP_DBA
DBA XDBADMIN
DBA PLUSTRACE
DBA JAVA_ADMIN
DBA JAVA_DEPLOY
DBA WM_ADMIN_ROLE
DBA EXP_FULL_DATABASE
DBA IMP_FULL_DATABASE
DBA DELETE_CATALOG_ROLE
DBA SELECT_CATALOG_ROLE
DBA EXECUTE_CATALOG_ROLE



and :-

SQL> select * from dba_role_privs where grantee = 'SYS';

GRANTEE GRANTED_ROLE
------------------------------ ---------------------------
SYS DBA
SYS CTXAPP
SYS WKUSER
SYS CONNECT
SYS OLAP_DBA
SYS RESOURCE
SYS XDBADMIN
SYS EJBCLIENT
SYS PLUSTRACE
SYS JAVAIDPRIV
SYS JAVA_ADMIN

Amukherji,

that's because (as part of the CREATE ROLE statement) Oracle automatically grants EVERY newly created role (WITH ADMIN OPTION) to SYS

hmm, so in dba_role _privs in GRANTEE column, only DBA is the role which is assigned roles and all other values are users..thanks ...i know this question was stupid but thanks for clearing my doubt..