The fields in the descriptor are defined, but not limited to, the following:
name : notification name
descriptorType : must be "notification"
severity : 1-5 where 1: fatal 2: severe 3: error 4: warn 5: info
messageID : unique key for message text (to allow translation,analysis)
messageText : text of notification
log : T - log message F - do not log message
logfile : string fully qualified file name appropriate for operating system
visibility : 1-4 where 1: always visible 4: rarely visible
presentationString : xml formatted string to allow presentation of data
The default descriptor contains the name, descriptorType, and severity=5 fields.