To list the top level internal documentation commands use ORADEBUG DOC:
| ORADEBUG DOC EVENT |
| ORADEBUG DOC COMPONENT |
In Oracle 12.1.0.2 output is:
SQL> ORADEBUG DOC Internal Documentation ********************** EVENT Help on events (syntax, event list, ...) COMPONENT [] List all components or describe
Components are arranged in nested hierarchies.
Each component has a unique. This means that it is not necessary to specify parent(s) to uniquenly identify components.
Most component descriptions include the internal module name(s) e.g.:
SQL_Execution SQL Execution (qer, qes, kx, qee) Parallel_Execution Parallel Execution (qerpx, qertq, kxfr, kxfx, kxfq, kxfp)