Auditing Feature Of Oracle 10g

Question

How do i choose to audit on particular tables or rather objects? i tried with the default settings which enable all actions on all database objects which creates a lot of unwanted audit data.
i tried the code:
alter system set audit_trail=DB scope=SPFILE;
this audits all actions on all objects which i dont want.
i also tried this:
noaudit insert,delete,select by sys2----this is the username that i use
even this does not limit audit data.

Answer 1

I had read the documentation related to auditing completely. Actually the problem was i had previously given the command:
audit all by sys2(username that i use)
so everything was being audited even after i disabled auditing completely and enabled again.
For a complete reset of auditing options,use the commmand:
delete from sys.audit$;
now do the following:
connect sys/manager as sysdba;
alter system set audit_trail=DB scope=SPFILE;
audit +<action>+ on +<tablename>+ by action;
perform audit only on selected objects and selected actions.
shutdown
startup
and you are ready to go.
Finely Grained Auditing not supported in XE i guess. Coz i searched alot and maybe this is what i concluded.
Just shared this in case it could be helpful to some one else.
Thank you.