management DecentralizedSituationManagement, -- container with DEN management and version control
situation DecentralizedSituation, -- container with event description, incl. type, severity
location DecentralizedSituationLocation, -- container with event location, location referencing with more detailed location description and the relevance area
...
}
DecentralizedSituationManagement::= SEQUENCE {
-- unique identifier about an event from one originator ITS station, combination of node ID and a sequence number
actionID ActionID, -- 6 byte
-- version of the DENM indicating updates from the same originator ITS station; value of 255 is used for the cancellation message sent from the originator ITS station
dataVersion DataVersion, -- 1 byte
-- time when the DENM is deleted from the DEN management and the information related to the event is set as invalid.. If it is not provided, it indicates that the expiry time is unkown by the originator ITS station
expiryTime TimeStamp OPTIONAL, -- 6 byte
frequency INTEGER (0..255) OPTIONAL, --units of 0.1 Hz
-- probability of the detected event to be true, varies from 0 to 100, with maximum value as full reliability
reliability INTEGER(0..100), -- 7 bits
-- negates the existence of an event at the event position by a third part ITS station that have received DENMs previously.
isNegation BOOLEAN -- 1 bit
}
-- event description derived from [3]
DecentralizedSituation::= SEQUENCE {
-- traffic status near the event position, defined based on [3], TPEG table tec001