| Value | Meaning |
|---|---|
| trace | Developer information for locating events when no useful stack traces are available |
| debugV | Developer information useful for algorithm debugging - for verbose output |
| debug_ | Developer information useful for algorithm debugging |
| diagnostic | Extended user information (e.g. for more detailed error information) |
| info | Informational message for normal user education |
| warn | Unexpected condition that could indicate an error but has no direct consequences |
| error | Normal error that is handled gracefully |
| critical | Error that severely influences the execution of the application |
| fatal | Error that forces the application to terminate |
| none | Special value used to indicate no logging when set as the minimum log level |
| verbose1diagnostic | Alias for diagnostic messages |
| verbose2debug_ | Alias for debug messages |
| verbose3debugV | Alias for verbose debug messages |
| verbose4trace | Alias for trace messages |
Specifies the log level for a particular log message.