The syslog interface (simplified) is:

procedure openlog(ident: string, facility: enum)
procedure syslog(priority: enum, message: string)

facility enum:

LOG_AUTH
LOG_AUTHPRIV
LOG_CRON
LOG_DAEMON
LOG_FTP
LOG_KERN
LOG_LPR
LOG_MAIL
LOG_NEWS
LOG_SECURITY
LOG_SYSLOG
LOG_USER
LOG_UUCP
LOG_LOCAL0

priority enum:

LOG_EMERG
LOG_ALERT
LOG_CRIT
LOG_ERR
LOG_WARNING
LOG_NOTICE
LOG_INFO
LOG_DEBUG

Should we use foreign-status objects to represent syslog messages?

(make-foreign-status
  'facility 'news
  'priority 'emerg
  'message "Pants on fire")

This goes against the foreign-status principle of having a particular
status code, but otherwise it fits.