Search notes:

Oracle: ALL_UNIFIED_AUDIT_ACTIONS

Unlike many other data dictionary objects, all_unified_audit_actions is a table.
On 23 free, the following components are recorded in all_unified_audit_actions: 
select
   component,
   type,
   count(*) cnt
from
   sys.all_unified_audit_actions
group by
   component,
   type
order by
   component;
--
-- COMPONENT              TYPE     CNT
-- ------------------- ------- -------
-- Database Vault            7     202
-- Datapump                 10       3
-- Direct path API          11       2
-- FineGrainedAudit          5       5
-- KACL_AUDIT               12       1
-- Label Security            8      18
-- Protocol                 13       3
-- RMAN_AUDIT                9       1
-- SQL Firewall             14       4
-- Standard                  4     232
-- XS                        6      50

See also

The view audsys.unified_audit_trail

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