do you use polling, pushing or triggering data?

Hello  Peter,

do you use polling, pushing or triggering data (see below)?

How many sensor data do you have to manage at the same time? And how
frequency?

 

Yours,

     Frank

 

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Von: Peter Waher [mailto:Peter.Waher@clayster.com] 
Gesendet: Dienstag, 26. Februar 2013 15:55
An: Frank Haferkorn; public-ssn-cg@w3.org
Betreff: RE: I am interested in Semantics and Sensors.

 

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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RST Industrie Automation GmbH * Carl-Zeiss-Str. 51, D-85521 Ottobrunn 

Tel. +49-89-9616018-20 * Fax +49-89-9616018-10 * http://www.rst-automation.de

 

Geschäftsführer: Dipl.-Ing.(FH) Robert Schachner 

Amtsgericht München: HRB 103 626 * ID-Nr. DE 811 466 035

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