# Logging

These interfaces deal with message logs, which can be submitted
by the application or by NNG itself.

- [nng_log](./nng_log.md) --- Message logs
- [nng_log_facility](./nng_log_facility.md) --- Facility for message logs
- [nng_log_level](./nng_log_level.md) --- Severity level for message logs
- [nng_log_logger](./nng_log_logger.md) --- Handler for log messages