Each Syslog message includes a priority value at the beginning of the text. The priority value ranges from 0 to 191 and is made up of a Facility value and a Level value. The priority is enclosed in "<>" delimiters.

A BSD Unix Syslog message looks like this:

HEADER MESSAGE

The priority is a value from 0 to 191 and is not space or leading zero padded.

For more information on the Syslog message format, please read the RFC3164.

The priority value is calculated using the following formula: