Version number for this message. Subclass generating the log message (or applicable subsystem of which the log message belongs). An occurrence type that categorizes the kind of activity or event that happened, triggering the log message. Indicates the severity of the Log Message. Scale traditionally applied to message based on requirements and characteristics of the component or ground system. The severity may be used to alert the operator in some way such as visual or audible notification. Debug is typically used by software developers. Which user/network position/proc the message has to do with. Time event happened ((may be earlier than actual posted time) Time event happened (may be earlier than published time) A local index or map to a table of additional information. Text for display (typically about 60 characters) One or more paragraphs that includes more detail. Suggested corrective action. Suggest specifying url in this field. For application use.