AW: I am interested in Semantics and Sensors.

Dear SSN team,

 

I was able to browse 

 

http://www.w3.org/2005/Incubator/ssn/ssnx/ssn

 

and got an impression of the SSN ontology.

I learned about the description of sensor data and other interesting items
like observation etc. .

 

But I still have a big Question:

HOW IS THE REAL ACCESS of the Sensor's Data implemented.

In my Eyes there are only three possible ways:

·       Pushing - the sensor is updating the related semantics itself,

·       Polling - there is some software entity that is polling the and
creating the semantic data from the sensor's output?

·       Triggering - The semantic data is generated on the fly at the moment
of the request for the data.

 

Which option is used in real SSN systems?

 

Yours,

  Frank Haferkorn

 

 

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