Not a keyword, but just a final enum specifying the number of enums.
(Source code) Origin of message String
Application parameters String(*)
Number of required columns.
Observation id (index in OBSERVATION table) Int.
PredefinedKeywords
Keywords with a predefined meaning.
Timestamp of message Double - s - EPOCH.
Originating object ID String.
CLI command sequence String(*)
"True" columns are defined.
"True" keywords are defined.
Priority of message: DEBUGGING, WARN, NORMAL, SEVERE String.
Not a column, but just a final enum specifying the number of enums.
Enums for the MeasurementSet HISTORY table.
PredefinedColumns
The HISTORY table colums with predefined meaning.