One Log - SchwarzIT/sap-usi-logging-api GitHub Wiki
This API was written to make support easier and that requires easy access to all relevant logs.
Your application might use another component directly or indirectly. If an error occurs in that component, it will affect your application. So in the end you will receive a ticket because your application is not working as expected. In such cases the logs of the used component must be accessible to you in an easy way.
Therefore, called components either reuse the main application's logger or their logs are linked to the main application's log to ensure they are easy to find. The desired behavior can be maintained in the customizing.
This ensures that all relevant log messages can be found via your main application's log - either directly within the log itself or in linked sub-logs.