First, some features are not available in older releases of the OS; so this is for recent releases -- say, V5R3 or later.

When you use SQL to create a collection, the system will create a journal named QSQJRN in the schema. That will be the default journal for that schema.

If you have a standard library, you can create a data area in that library named QDFTJRN. The data area will contain the name of the journal that you want to be the default journal for new objects created in that library. See Automatically starting journaling for details on values you store in the data area.

For an IFS directory, if use STRJRN to start journaling on that directory, you can specify the INHERIT(*YES) parameter. That sets the journal for the directory as the default journal for new objects in that directory.

The system audit journal is always named QAUDJRN and it must be created in library QSYS. The journal receivers can be in any library you choose. The system job accounting journal is always named QACGJRN and it must also be created in library QSYS. The receivers can be created wherever is best for you.

One of the quickest ways to see examples of other journals is to run WRKJRN with default parameters. Some (or all) of the journals in your library list will be listed. This includes journals in the system portion of your library list. If you are not authorized to use a journal, a diagnostic message will be sent to your session with the name of the journal in the message. There might be a number of messages for you to scroll through if journals are restricted from viewing.

Tom