Are MeasurementProperties and OperatingProperties observable ?

Hi all,

In [1], Kerry you ask:

>Kerry: I am worried about this. This makes all instances of (e.g.
> oldssn:MeasurementProperty)s become sosa:ObservableProperty,
> when they were only oldssn:Property before. And also when we have that
> newssn:MeasurementProperty is not necessarily sosa:ObservableProperty. If
> "observationProperty" means anything at all (and I am totally unconvinced
that it
> does), then this must be wrong? e.g. any oldssn:Accuracy instance becomes
a
> sosa:ObservableProperty.


In the old SSN, the definition of ssn:Property is:
 "An observable Quality of an Event or Object.  That is, not a Quality of
an abstract entity, but rather an aspect of an entity that is intrinsic to
and cannot exist without the entity and that is observable by a sensor."

and then all of the following classes are defined as sub classes of
oldssn:Property

oldssn:MeasurementCapability
oldssn:MeasurementProperty
oldssn:MeasurementRange
oldssn:Accuracy
oldssn:DetectionLimit
oldssn:Drift
oldssn:Frequency
oldssn:Latency
oldssn:Precision
oldssn:Resolution
oldssn:ResponseTime
oldssn:Selectivity
oldssn:Sensitivity
oldssn:MaintenanceSchedule
oldssn:OperatingProperty
oldssn:OperatingRange
oldssn:SurvivalProperty
oldssn:SurvivalRange
oldssn:SystemLifetime
oldssn:OperatingPowerRange
oldssn:BatteryLifetime

Most of these properties are not observable directly by sensors.

Therefore I share your concern and would agree to say that the old
definition of oldssn:Property should have been a bit loosen to account for
non-observable properties.

I added a con to option 5 and added a new Option 6 to the list.



You also add:
> Having said that, by definition any newssn:Property,
> including Accuracy and SurvivalRange and BatteryPower has to be a
property of a
> FeatureofInterest....(and the FoI would often be a sensor or a system).

This seems correct to me, isn't it ?
So we could add the following axioms to reflect this ?

newssn:MeasurementProperty rdfs:subClassOf [
  owl:onProperty newssn:isPropertyOf ;
  owl:allValuesFrom newssn:Sensor ] .

newssn:OperatingProperty rdfs:subClassOf [
  owl:onProperty newssn:isPropertyOf ;
  owl:allValuesFrom newssn:System ] .


Kind regards,
Maxime


[1] - https://www.w3.org/2015/spatial/wiki/Property_and_Observable_Property