Re: another relevant bit of ontology

I think I'm in agreement with both Amit and John in that I think  
semantics is (here comes a gross simplification) really about  
description and relationships, and that you should reason about those  
things (and the data that they describe) by whatever method works  
best.  No need to stop with OWL, rules and relations - though, I think  
you can get a long way with that much.

If you are concerned with subsumption, satisfaction etc, then OWL/DL  
reasoning is the way to go, but if your semantics tells you that to  
work out that it's winter you actually need observations from sensors  
of a particular type from a particular area and a particular sort of  
temperature/temporal/atmospheric model written in C, then use the OWL  
to compute the sensors of the right type, and your spatial reasoning  
to find the ones in the right area and then use the model to determine  
if it's winter.  If the process tells you that you need to assert new  
triples that might be used by some other sort of reasoning, go ahead -  
but you'd better get the logic right.

I guess I'm just saying the obvious thing that semantics is supposed  
to enable all these things and not be constraining.  So yes why not  
"any reasoning over any information associated with sensors".

Michael




On 27/05/2009, at 5:20 , John Graybeal wrote:

> OK, I think that one explicitly addressed the fact they were drawing  
> inferences about the reasons the data has problems.  For example,  
> "In this section, we explore how our reasoning system can evaluate  
> these data to signal the plausibility of several hypotheses to  
> explain their correlations." (p.7)
>
> I assume inference over observational data fits into the scope of  
> the project... In my naive world, I assume any reasoning over any  
> information associated with sensors fits into the project.  If the  
> project is to semantically describe sensors, how would you constrain  
> what kinds of reasoning we mean to support?
>
> John
>
>
> On May 26, 2009, at 7:55 AM, Cory Henson wrote:
>
>> Sorry for confusion, I was referring to the paper you sent to start  
>> this thread.
>>
>> [1] http://efg.cs.umb.edu/pubs/SensorDataReasoning.pdf
>>
>> -Cory
>>
>>
>> On Tue, May 26, 2009 at 10:50 AM, John Graybeal  
>> <graybeal@mbari.org> wrote:
>> Cory,
>>
>> Please clarify which link you mean by "this paper"?  Thanks.
>>
>> John
>>
>>
>> On May 26, 2009, at 7:03 AM, Cory Henson wrote:
>>
>>> The paper seems to be discussing deductive rule-based reasoning  
>>> with sensor data. While this is definitely useful for certain  
>>> tasks (i.e., checking constraints and data validity) it may be  
>>> insufficient for other purposes such as interpretation and  
>>> explanation of sensor data. For example, the rule on page 5 says  
>>> that if the temperature is less than zero Celsius then it must be  
>>> winter.  But, is it winter because it is cold, or is it cold  
>>> because it is winter? Or is it cold because the sensor is in a  
>>> freezer? Interpretation of observations seems more like an  
>>> abductive task, where there are often multiple hypothetical  
>>> explanations for a set of sensor data. Just a suggestion in case  
>>> inference over observation data fits into the scope of this  
>>> project.  For reference please see: http://knoesis.wright.edu/library/resource.php?id=00595
>>>
>>> On Tue, May 26, 2009 at 9:45 AM, Oscar Corcho <ocorcho@fi.upm.es>  
>>> wrote:
>>> I tend to agree with Amit. Anyway, probably Víctor was not referring
>>> necessarily to DL reasoning, but also to some RDF inferencing.
>>>
>>> Oscar
>>>
>>> -----Mensaje original-----
>>> De: public-xg-ssn-request@w3.org [mailto:public-xg-ssn-request@w3.org 
>>> ] En
>>> nombre de Amit P. Sheth
>>> Enviado el: martes, 26 de mayo de 2009 14:23
>>> Para: Victor Manuel Pelaez Martinez
>>> CC: public-xg-ssn@w3.org
>>> Asunto: Re: another relevant bit of ontology
>>>
>>> I would argue that DL inferencing is not the only or even primary  
>>> way to
>>> exploit semantics. We have had lits of debate in the community
>>> and we generally agree that SW's benefits not only machine  
>>> processing
>>> but also, human understandability and use a of data. RDF  
>>> processing is
>>> perfectly
>>> adequate ways to exploit semantics by exploiting relationships
>>> as first class objects.
>>> Semantic annotations can improve search, for example,
>>> or integration, without using inferencing.
>>> Some ideas are in this paper:
>>> http://knoesis.wright.edu/library/resource.php?id=00050
>>>
>>> Amit
>>> http://knoesis.org/amit
>>>
>>> Victor Manuel Pelaez Martinez wrote:
>>> >
>>> > Dear All,
>>> >
>>> > This is a quite interesting use case, but it’s focused more on the
>>> > sensor data than in the sensor network itself, so in our opinion  
>>> it
>>> > fits only partially in the scope of the group (as the group  
>>> discussed
>>> > in one of the teleconferences).
>>> >
>>> > We think that the most interesting point is the use of ontology
>>> > reasoning (in this case using rules) because it goes further  
>>> than the
>>> > use cases based on syntactic queries.
>>> >
>>> > In our opinion we shouldn't be able to solve use cases using only
>>> > syntactic queries, because that would mean that those use cases  
>>> could
>>> > be solved using other non-semantic technologies.
>>> >
>>> > We think that the use cases should show the advantages of using
>>> > semantic technologies, so some kind of reasoning or inference  
>>> should
>>> > be necessary in order to solve them (as it is done in the paper  
>>> sent
>>> > by John). Perhaps this could be a good point to discuss within  
>>> the use
>>> > case work package.
>>> >
>>> > Regards,
>>> >
>>> > Víctor M. Peláez
>>> >
>>> > Fundación CTIC
>>> >
>>> > Departamento de I+D+i
>>> >
>>> > victor.pelaez@fundacionctic.org <mailto:victor.pelaez@fundacionctic.org 
>>> >
>>> >
>>> > Tfno: +34 984 29 12 12
>>> >
>>> > Fax: +34 984 39 06 12
>>> >
>>> > Parque Científico Tecnológico Gijón - Asturias - Spain
>>> >
>>> > www.fundacionctic.org <http://www.fundacionctic.org>
>>> >
>>> >  
>>> ------------------------------------------------------------------------
>>> >
>>> > *De:* public-xg-ssn-request@w3.org
>>> > [mailto:public-xg-ssn-request@w3.org] *En nombre de *John Graybeal
>>> > *Enviado el:* jueves, 21 de mayo de 2009 0:39
>>> > *Para:* public-xg-ssn@w3.org
>>> > *CC:* Bob Morris; Matt Calder; Francesco Peri
>>> > *Asunto:* another relevant bit of ontology
>>> >
>>> > Folks,
>>> >
>>> > Bob Morris and his team at UMass (copied) have a paper in review  
>>> [1]
>>> > that seems highly relevant as a demonstration use case. It  
>>> describes
>>> > using ontologies to relate types
>>> >
>>> > of ecosystem events to properties of the ecosystem and the sensors
>>> > observing it.
>>> >
>>> > I added this reference to the Use Cases page, and also to the
>>> > References page, but the sensor ontology itself may be of direct
>>> > interest (I don't have a link to that yet).
>>> >
>>> > John
>>> >
>>> > [1] http://efg.cs.umb.edu/pubs/SensorDataReasoning.pdf
>>> >
>>> > --------------
>>> >
>>> > John Graybeal <mailto:graybeal@mbari.org> -- 831-775-1956
>>> > Monterey Bay Aquarium Research Institute
>>> > Marine Metadata Interoperability Project: http:// 
>>> marinemetadata.org
>>> >
>>>
>>>
>>>
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>>>
>>>
>>>
>>>
>>>
>>> -- 
>>> Cory Andrew Henson
>>> Kno.e.sis Center, Wright State University
>>> http://knoesis.wright.edu/researchers/cory/
>>
>>
>> John
>>
>> --------------
>> John Graybeal   <mailto:graybeal@mbari.org>  -- 831-775-1956
>> Monterey Bay Aquarium Research Institute
>> Marine Metadata Interoperability Project: http://marinemetadata.org
>>
>>
>>
>>
>> -- 
>> Cory Andrew Henson
>> Kno.e.sis Center, Wright State University
>> http://knoesis.wright.edu/researchers/cory/
>
>
> John
>
> --------------
> John Graybeal   <mailto:graybeal@mbari.org>  -- 831-775-1956
> Monterey Bay Aquarium Research Institute
> Marine Metadata Interoperability Project: http://marinemetadata.org
>