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Re: SOSA core - procedures vs devices

From: Krzysztof Janowicz <janowicz@ucsb.edu>
Date: Tue, 12 Jul 2016 22:43:43 -0700
To: Rob Atkinson <rob@metalinkage.com.au>, Simon.Cox@csiro.au, jlieberman@tumblingwalls.com
Cc: danh.lephuoc@tu-berlin.de, armin.haller@anu.edu.au, public-sdw-wg@w3.org, kerry.taylor@anu.edu.au
Message-ID: <5785D50F.8080507@ucsb.edu>
> because procedures are not unique to sensing, its is necessary to 
> allow procedures to be independent of sensors

Yes, absolutely. We get this for 'free' thanks to the semantics of 
RDF/OWL. There are ObservationProcedures, SamplingProcedures, and many 
more types of procedures (that we do not need to consider). As long as 
we do not have global domain and range restrictions we will be fine.

> Is a deployed sensor just a sampling feature 

I would not say so. IMHO, a sampling feature is something like a 
trajectory taken by a research vessel to collect observations as the 
vessel cannot sample the entire feature of interest (e.g., an ocean). Am 
I missing/misunderstanding something?


On 07/12/2016 09:34 PM, Rob Atkinson wrote:
> Probably going to rehash an old debate here, but given there is an 
> active conversation trying to make the model more easily understood to 
> outsiders I'll dive in to check my comprehension...
> This description ( sensor->procedure->activity) is helpful to me at 
> least to quickly understand the basic concerns. It introduces a 
> requirement on the modularity IMHO: because procedures are not unique 
> to sensing, its is necessary to allow procedures to be independent of 
> sensors - because there are numerical models that generate similar 
> looking results to sensing.
> Sensing appears to be bound up in the spatio-temporal frame of 
> reference of the observer, whereas the spatio-temporal frame of 
> reference of the phenomena is common to sensing, models, statistical 
> operations (are these just models).  I would expect the model module 
> structure to reflect this: its a way of attaching such sensing related 
> metadata to a general observation process. Is a deployed sensor just a 
> sampling feature (being a sensor within a specific spatio-temporal 
> context but also within a context where what it observes indirectly 
>  to a property of the feature of interest?)
> cheers
> Rob
> On Wed, 13 Jul 2016 at 09:50 <Simon.Cox@csiro.au> wrote:
>     Yes, but I think we were thinking more that a procedure uses a
>     device, during an activity.
>     When describing the agents of observation, it depends how close
>     you want to look. There are multiple layers of encapsulation. That
>     was probably the motivation for bundling them together in SensorML
>     and O&M, but SSN chose to be more careful about distinguishing
>     physical devices from workflows – which I certainly understand as
>     well.
>     The word ‘process’ is overloaded, and in particular is used in
>     contradictory ways in BFO and O&M, and SensorML uses it in both
>     ways. So now I prefer to avoid it altogether.
>     *From:*Joshua Lieberman [mailto:jlieberman@tumblingwalls.com
>     <mailto:jlieberman@tumblingwalls.com>]
>     *Sent:* Wednesday, 13 July 2016 9:10 AM
>     *To:* Cox, Simon (L&W, Clayton) <Simon.Cox@csiro.au>
>     *Cc:* danh.lephuoc@tu-berlin.de
>     <mailto:danh.lephuoc@tu-berlin.de>; janowicz@ucsb.edu
>     <mailto:janowicz@ucsb.edu>; armin.haller@anu.edu.au
>     <mailto:armin.haller@anu.edu.au>; public-sdw-wg@w3.org
>     <mailto:public-sdw-wg@w3.org>; kerry.taylor@anu.edu.au
>     <mailto:kerry.taylor@anu.edu.au>
>     *Subject:* Re: SOSA core - procedures vs devices
>     Sorry I missed the call today. So a device “runs” (l:n) a
>     procedure in / during (1:n) a process?
>     —Josh
>         On Jul 12, 2016, at 6:39 PM, simon.cox@csiro.au
>         <mailto:simon.cox@csiro.au> wrote:
>         I’ve put some notes and a diagram explaining my understanding
>         of the consensus from today’s call here
>         https://www.w3.org/2015/spatial/wiki/SOSA_Ontology#Procedures_vs_Devices
>         Note
>         1.I have adjusted the names of the classes to avoid ambiguity
>         between the re-usable things and the events when they are used
>         2.I have not yet implemented this in SOSA-Core – its just a
>         proposal for now.
>         Simon

Krzysztof Janowicz

Geography Department, University of California, Santa Barbara
4830 Ellison Hall, Santa Barbara, CA 93106-4060

Email: jano@geog.ucsb.edu
Webpage: http://geog.ucsb.edu/~jano/
Semantic Web Journal: http://www.semantic-web-journal.net
Received on Wednesday, 13 July 2016 05:44:15 UTC

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