Search notes:

Oracle Scheduler Objects

Scheduler objects are standard Oracle objects. Thus,

they can be granted and revoked privileges and
they belong to a user/schema (and are referenced either by schemaname.objectname or objectname

Job	The fundamental scheduler object.
Job classes	Allows to assign the same attributes or set resource definitions to/for mulitple (so called member-) jobs.
Program	Description of the action to be executed by the scheduler.
Schedule	Specification of when and how often a job is run.
Destination
File watcher	Specification of file characteristics. When a file matching these characteristics arrives on the Server, a job is triggered.
Window	An time interval
Chain	Specification of dependencies among jobs.
Credentials	A username-password pair.
Group	A list of scheduler objects
Incompatibility	?

Job Class

A job class groups a set of jobs so that the can be administered simulataneously.

…

The window group MAINTENANCE_WINDOW_GROUP contains maintenance windows.

By default, predefined maintenance windows use the resource plan DEFAULT_MAINTENANCE_PLAN.

See also dba_autotask_window_clients, dba_autotask_schedule and dbms_auto_task_admin.

A destination group is a scheduler object that contains a list of scheduler destination objects.

A scheduler objects has attributes that can be set or modified with dbms_scheduler.set_attribute.