Re: I am interested in Semantics and Sensors.

Hello Peter,

Do you store the sensor data values in RDF or do you point to a JSON or XML object? 

Thanks,

Michael

On Feb 26, 2013, at 6:55 AM, Peter Waher <Peter.Waher@clayster.com> wrote:

> Hello Frank
>  
> In our system (running on servers or plug computers, gateways, etc.), semantic data for all connected sensors is generated on the fly (on demand). It has a built in SPARQL engine which can process a variety of RDF triple sources. One such type of triple source is an on demand converter of sensor information to semantic information. As we control the SPARQL engine ourselves, we don’t have the need to create a huge triple store for all semantic data necessary to describe the sensor network.
>  
> Sincerely,
> Peter Waher
>  
> From: Frank Haferkorn [mailto:F.Haferkorn@RST-Automation.de] 
> Sent: den 26 februari 2013 07:16
> To: public-ssn-cg@w3.org
> Cc: Peter Waher
> Subject: 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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