To list the event scope internal documentation commands use ORADEBUG DOC EVENT SCOPE:
In Oracle 12.1.0.2 output is:
SQL> ORADEBUG DOC EVENT SCOPE Event scopes in library RDBMS: ------------------------------ SQL[] sql scope for RDBMS
Scope is the SQL scope for RDBMS events. It is defined using the following syntax:
[SQL:sql_id <string>]
For example:
[SQL:sql_id s1yukp05bzg6]
Multiple SQL_IDs can be specified using | as a separator. For example:
[SQL:sql_id s1yukp05bzg6 | aca4xvmz0rzup]