semantic and unit description for measurement values in streampipes?

[Florian Micklich <mi...@apache.org>]

Me again,

do we have somewhere an up-to-date- examples on how to implement units in StreamPipes processor elements?

I found an "old"? example in the speed calculator [1] but I guess only the ontology is added here and not the units?

My goal would be to add automatically measurement ontology's with the specific units like
* distance in meters, distance in km etc etc
* meassurments of areas m², km² 
* speed in km/h 
 and so on.

What kind of methods are available to me in StreamPipes to accomplish this?


Greetings
Florian


[1] https://github.com/apache/streampipes/blob/dev/streampipes-extensions/streampipes-processors-geo-jvm/src/main/java/org/apache/streampipes/processors/geo/jvm/processor/speed/SpeedCalculatorController.java#L69