Each subsystem has its own namespace for fields it contains. This means two fields in different subsystems can have the same name;
for example, log.status and security.status refer to two different fields. The subsystem parameter identifies the default subsystem
to use when validating/querying a field that is not explicitly qualified by its subsystem.
Each subsystem has its own namespace for fields it contains. This means two fields in different subsystems can have the same name; for example, log.status and security.status refer to two different fields. The subsystem parameter identifies the default subsystem to use when validating/querying a field that is not explicitly qualified by its subsystem.