# Parser Modules

Parser modules are used to parse message content, once the message has been received. They can be used to process custom message formats or invalidly formatted messages. For details, please see the rsyslog message parser documentation.

The current modules are currently provided as part of rsyslog:

- pmciscoios
  - Parser Parameters
  - Example
- pmlastmsg: last message repeated n times
- pmrfc3164: Parse RFC3161-formatted messages
  - Parser Parameters
  - Example
- pmrfc3164sd: Parse RFC5424 structured data inside RFC3164 messages
- pmrfc5424: Parse RFC5424-formatted messages