Re: ssn: action-155

As discussed before, I believe that om-lite should be integrated with 
the current SSN. In fact, I still strongly believe that we need to 
develop a simple core ontology/vocabulary around central notions such as 
sensor and observations that can be used for simple, everyday linked 
data and acts as interfaces/hooks for other SSN modules.

Krzysztof


On 05/09/2016 06:06 PM, Simon.Cox@csiro.au wrote:
>
> FWIW All classes and most properties in om-lite have reasonably 
> precise definitions in rdf:comment and dct:description properties. 
>  Not formally axiomatized, but a lot more than just labels. For 
> example oml:Observation is described:
>
> An observation is an act associated with a discrete time instant or 
> period through which a number, term or other symbol is assigned to a 
> phenomenon [2]. It involves application of a specified procedure, such 
> as a sensor, instrument, algorithm or process chain. The procedure may 
> be applied in-situ, remotely, or ex-situ with respect to the sampling 
> location. The result of an observation is an estimate of the value of 
> a property of some feature. Use of a common model allows observation 
> data using different procedures to be combined unambiguously.
>
> The observation itself is also a feature, since it has properties and 
> identity.
>
> Observation details are important for data discovery and for data 
> quality estimation.
>
> The observation could be considered to carry metadata about an 
> instance of a property (of the feature of interest). This 
> property-value metadata complements the dataset and feature metadata 
> that have been conventionally considered (e.g. ISO 19115).
>
> The values for the properties 'procedure', 'featureOfInterest', 
> 'observedProperty', 'phenomenonTime', 'resultTime' may be inherited 
> from a container resource.
>
> See http://def.seegrid.csiro.au/ontology/om/om-lite#Observation
>
> Simon
>
> *From:*Krzysztof Janowicz [mailto:janowicz@ucsb.edu]
> *Sent:* Tuesday, 10 May 2016 5:29 AM
> *To:* Kerry Taylor <kerry.taylor@anu.edu.au>; public-sdw-wg@w3.org
> *Subject:* Re: ssn: action-155
>
> Hi Kerry,
>
> Sure. One of the reasons to include DUL in the original SSN was the 
> need for a stronger semantic anchoring of the classes and 
> relationships defined in SSN. One problem we faced was that terms such 
> as Sensor, System, Observation, were under-specific to a degree where 
> a major part of the intended interpretation of these classes was 
> encoded in terms of their labels. DUL gave us additional axioms to 
> further refine what was meant by 'Sensor', 'Observation' and so forth. 
> Removing DUL, will leave us with the same problem as we had before, 
> and, thus, I proposed to make use of the power of OWL2 to add a 
> stronger axiomatic foundation to SSN (classes).
>
> Best,
> Krzysztof
>
>
>
> On 05/09/2016 05:20 AM, Kerry Taylor wrote:
>
>     Krzysztof,
>
>     https://www.w3.org/2015/spatial/track/actions/155
>
>     Could you please address this remark you made in an ssn meeting
>     some time ago? I read it as a suggestion for a major ssn rewrite,
>     but perhaps it  is a suggestion for an extension instead?  Or
>     something else?  It is sitting on this page
>     https://www.w3.org/2015/spatial/wiki/SSN_Tasks  at present but
>     maybe it deserves attention as one of these proposals on the wiki
>     here
>     https://www.w3.org/2015/spatial/wiki/Proposals_for_rewriting_SSN?
>      If nothing better can  you please explain it on the list so we
>     can handle it appropriately and write it off the “task list” if
>     appropriate?
>
>     Thanks,
>
>     Kerry
>
>
>
>
> -- 
> Krzysztof Janowicz
> Geography Department, University of California, Santa Barbara
> 4830 Ellison Hall, Santa Barbara, CA 93106-4060
> Email:jano@geog.ucsb.edu <mailto:jano@geog.ucsb.edu>
> Webpage:http://geog.ucsb.edu/~jano/ <http://geog.ucsb.edu/%7Ejano/>
> Semantic Web Journal:http://www.semantic-web-journal.net


-- 
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