((id "SEVERITY")
 (mandatory yes)
 (meaning "severity as an exact integer in [0,7]")
 (reference "RFC 5424, 6.2.1"))

((id "MESSAGE")
 (mandatory yes)
 (meaning "free-form message as a string")
 (reference ""))

((id "FACILITY")
 (mandatory no)
 (meaning "facility as an exact integer")
 (reference "RFC 5424, 6.2.1"))

((id "APP-NAME")
 (mandatory no)
 (meaning "APP-NAME as a string")
 (reference "RFC 5424, 6.2.5"))

((id "PROCID")
 (mandatory no)
 (meaning "PROCID as a string")
 (reference "RFC 5424, 6.2.6"))

((id "MSGID")
 (mandatory no)
 (meaning "MSGID as a string")
 (reference "RFC 5424, 6.2.7"))

((id "MESSAGE_ID")
 (mandatory no)
 (meaning "128-bit message identifier")
 (reference "systemd.journal-fields(7)"))

((id "TOPIC")
 (mandatory no)
 (meaning "topic (or equivalent) of the logger")
 (reference "Racket"))