A label to identify the source bus, eg serial-COM1, eth-local,etc . Can be anything but should follow a predicatable format
Optional
aisAIS Message Type
Optional
canNMEA2000 can name of the source device
Optional
instanceNMEA2000 instance value of the source message
Optional
pgnNMEA2000 pgn of the source message
Optional
sentenceSentence type of the source NMEA0183 sentence, $GP[RMC],092750.000,A,5321.6802,N,00630.3372,W,0.02,31.66,280511,,,A*43
Optional
srcNMEA2000 src value or any similar value for encapsulating the original source of the data
Optional
talkerTalker id of the source NMEA0183 sentence, $[GP]RMC,092750.000,A,5321.6802,N,00630.3372,W,0.02,31.66,280511,,,A*43
Optional
typeA human name to identify the type. NMEA0183, NMEA2000, signalk
Source of data in delta format, a record of where the data was received from. An object containing at least the properties defined in 'properties', but can contain anything beyond that.